Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - kasan updates

 - procfs

 - lib/bitmap updates

 - other lib/ updates

 - checkpatch tweaks

 - rapidio

 - ubsan

 - pipe fixes and cleanups

 - lots of other misc bits

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
  Documentation/sysctl/user.txt: fix typo
  MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
  MAINTAINERS: update various PALM patterns
  MAINTAINERS: update "ARM/OXNAS platform support" patterns
  MAINTAINERS: update Cortina/Gemini patterns
  MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
  MAINTAINERS: remove ANDROID ION pattern
  mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
  mm: docs: fix parameter names mismatch
  mm: docs: fixup punctuation
  pipe: read buffer limits atomically
  pipe: simplify round_pipe_size()
  pipe: reject F_SETPIPE_SZ with size over UINT_MAX
  pipe: fix off-by-one error when checking buffer limits
  pipe: actually allow root to exceed the pipe buffer limits
  pipe, sysctl: remove pipe_proc_fn()
  pipe, sysctl: drop 'min' parameter from pipe-max-size converter
  kasan: rework Kconfig settings
  crash_dump: is_kdump_kernel can be boolean
  kernel/mutex: mutex_is_locked can be boolean
  ...

Documentation/sysctl/user.txt

@@ -3,7 +3,7 @@ Documentation for /proc/sys/user/*	kernel version 4.9.0
 
 ==============================================================
 
-This file contains the documetation for the sysctl files in
+This file contains the documentation for the sysctl files in
 /proc/sys/user.
 
 The files in this directory can be used to override the default

MAINTAINERS

@@ -903,7 +903,6 @@ L:	devel@driverdev.osuosl.org
 S:	Supported
 F:	drivers/staging/android/ion
 F:	drivers/staging/android/uapi/ion.h
-F:	drivers/staging/android/uapi/ion_test.h
 
 AOA (Apple Onboard Audio) ALSA DRIVER
 M:	Johannes Berg <johannes@sipsolutions.net>
@@ -1308,7 +1307,6 @@ M:	Russell King <linux@armlinux.org.uk>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 T:	git git://git.armlinux.org.uk/~rmk/linux-arm.git clkdev
-F:	arch/arm/include/asm/clkdev.h
 F:	drivers/clk/clkdev.c
 
 ARM/COMPULAB CM-X270/EM-X270 and CM-X300 MACHINE SUPPORT
@@ -1360,7 +1358,7 @@ F:	Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt
 F:	Documentation/devicetree/bindings/net/cortina,gemini-ethernet.txt
 F:	Documentation/devicetree/bindings/rtc/faraday,ftrtc010.txt
 F:	arch/arm/mach-gemini/
-F:	drivers/net/ethernet/cortina/gemini/*
+F:	drivers/net/ethernet/cortina/
 F:	drivers/pinctrl/pinctrl-gemini.c
 F:	drivers/rtc/rtc-ftrtc010.c
 
@@ -1737,9 +1735,7 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-oxnas@lists.tuxfamily.org (moderated for non-subscribers)
 S:	Maintained
 F:	arch/arm/mach-oxnas/
-F:	arch/arm/boot/dts/ox8*.dtsi
-F:	arch/arm/boot/dts/wd-mbwe.dts
-F:	arch/arm/boot/dts/cloudengines-pogoplug-series-3.dts
+F:	arch/arm/boot/dts/ox8*.dts*
 N:	oxnas
 
 ARM/PALM TREO SUPPORT
@@ -1747,8 +1743,7 @@ M:	Tomas Cech <sleep_walker@suse.com>
 L:	linux-arm-kernel@lists.infradead.org
 W:	http://hackndev.com
 S:	Maintained
-F:	arch/arm/mach-pxa/include/mach/palmtreo.h
-F:	arch/arm/mach-pxa/palmtreo.c
+F:	arch/arm/mach-pxa/palmtreo.*
 
 ARM/PALMTX,PALMT5,PALMLD,PALMTE2,PALMTC SUPPORT
 M:	Marek Vasut <marek.vasut@gmail.com>
@@ -1757,12 +1752,10 @@ W:	http://hackndev.com
 S:	Maintained
 F:	arch/arm/mach-pxa/include/mach/palmtx.h
 F:	arch/arm/mach-pxa/palmtx.c
-F:	arch/arm/mach-pxa/include/mach/palmt5.h
-F:	arch/arm/mach-pxa/palmt5.c
+F:	arch/arm/mach-pxa/palmt5.*
 F:	arch/arm/mach-pxa/include/mach/palmld.h
 F:	arch/arm/mach-pxa/palmld.c
-F:	arch/arm/mach-pxa/include/mach/palmte2.h
-F:	arch/arm/mach-pxa/palmte2.c
+F:	arch/arm/mach-pxa/palmte2.*
 F:	arch/arm/mach-pxa/include/mach/palmtc.h
 F:	arch/arm/mach-pxa/palmtc.c
 
@@ -1771,8 +1764,7 @@ M:	Sergey Lapin <slapin@ossfans.org>
 L:	linux-arm-kernel@lists.infradead.org
 W:	http://hackndev.com
 S:	Maintained
-F:	arch/arm/mach-pxa/include/mach/palmz72.h
-F:	arch/arm/mach-pxa/palmz72.c
+F:	arch/arm/mach-pxa/palmz72.*
 
 ARM/PLEB SUPPORT
 M:	Peter Chubb <pleb@gelato.unsw.edu.au>
@@ -1801,7 +1793,6 @@ F:	drivers/clk/qcom/
 F:	drivers/dma/qcom/
 F:	drivers/soc/qcom/
 F:	drivers/spi/spi-qup.c
-F:	drivers/tty/serial/msm_serial.h
 F:	drivers/tty/serial/msm_serial.c
 F:	drivers/*/pm8???-*
 F:	drivers/mfd/ssbi.c
@@ -3567,7 +3558,7 @@ F:	drivers/media/platform/coda/
 
 COMMON CLK FRAMEWORK
 M:	Michael Turquette <mturquette@baylibre.com>
-M:	Stephen Boyd <sboyd@codeaurora.org>
+M:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-clk@vger.kernel.org
 Q:	http://patchwork.kernel.org/project/linux-clk/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
@@ -10284,7 +10275,7 @@ F:	include/uapi/linux/openvswitch.h
 OPERATING PERFORMANCE POINTS (OPP)
 M:	Viresh Kumar <vireshk@kernel.org>
 M:	Nishanth Menon <nm@ti.com>
-M:	Stephen Boyd <sboyd@codeaurora.org>
+M:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-pm@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git
@@ -13020,7 +13011,7 @@ F:	Documentation/networking/spider_net.txt
 F:	drivers/net/ethernet/toshiba/spider_net*
 
 SPMI SUBSYSTEM
-R:	Stephen Boyd <sboyd@codeaurora.org>
+R:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-arm-msm@vger.kernel.org
 F:	Documentation/devicetree/bindings/spmi/
 F:	drivers/spmi/
@@ -13905,7 +13896,7 @@ F:	include/linux/usb/tilegx.h
 TIMEKEEPING, CLOCKSOURCE CORE, NTP, ALARMTIMER
 M:	John Stultz <john.stultz@linaro.org>
 M:	Thomas Gleixner <tglx@linutronix.de>
-R:	Stephen Boyd <sboyd@codeaurora.org>
+R:	Stephen Boyd <sboyd@kernel.org>
 L:	linux-kernel@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
 S:	Supported

Makefile

@@ -434,7 +434,8 @@ export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 
 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
-export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_KASAN CFLAGS_UBSAN
+export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
+export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
@@ -679,6 +680,10 @@ endif
 # This selects the stack protector compiler flag. Testing it is delayed
 # until after .config has been reprocessed, in the prepare-compiler-check
 # target.
+ifdef CONFIG_CC_STACKPROTECTOR_AUTO
+  stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
+  stackp-name := AUTO
+else
 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
   stackp-flag := -fstack-protector
   stackp-name := REGULAR
@@ -687,16 +692,40 @@ ifdef CONFIG_CC_STACKPROTECTOR_STRONG
   stackp-flag := -fstack-protector-strong
   stackp-name := STRONG
 else
+  # If either there is no stack protector for this architecture or
+  # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
+  # is empty, skipping all remaining stack protector tests.
+  #
   # Force off for distro compilers that enable stack protector by default.
-  stackp-flag := $(call cc-option, -fno-stack-protector)
+  KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
+endif
 endif
 endif
 # Find arch-specific stack protector compiler sanity-checking script.
-ifdef CONFIG_CC_STACKPROTECTOR
+ifdef stackp-name
+ifneq ($(stackp-flag),)
   stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
   stackp-check := $(wildcard $(stackp-path))
+  # If the wildcard test matches a test script, run it to check functionality.
+  ifdef stackp-check
+    ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
+      stackp-broken := y
+    endif
+  endif
+  ifndef stackp-broken
+    # If the stack protector is functional, enable code that depends on it.
+    KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
+    # Either we've already detected the flag (for AUTO) or we'll fail the
+    # build in the prepare-compiler-check rule (for specific flag).
+    KBUILD_CFLAGS += $(stackp-flag)
+  else
+    # We have to make sure stack protector is unconditionally disabled if
+    # the compiler is broken (in case we're going to continue the build in
+    # AUTO mode).
+    KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
+  endif
+endif
 endif
-KBUILD_CFLAGS += $(stackp-flag)
 
 ifeq ($(cc-name),clang)
 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
@@ -1091,14 +1120,25 @@ PHONY += prepare-compiler-check
 prepare-compiler-check: FORCE
 # Make sure compiler supports requested stack protector flag.
 ifdef stackp-name
+  # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
+  ifeq ($(stackp-flag),)
+	@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
+		  Compiler does not support any known stack-protector >&2
+  else
+  # Fail if specifically requested stack protector is missing.
   ifeq ($(call cc-option, $(stackp-flag)),)
 	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
 		  $(stackp-flag) not supported by compiler >&2 && exit 1
   endif
+  endif
 endif
-# Make sure compiler does not have buggy stack-protector support.
-ifdef stackp-check
-  ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
+# Make sure compiler does not have buggy stack-protector support. If a
+# specific stack-protector was requested, fail the build, otherwise warn.
+ifdef stackp-broken
+  ifeq ($(stackp-name),AUTO)
+	@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
+                  $(stackp-flag) available but compiler is broken: disabling >&2
+  else
 	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                   $(stackp-flag) available but compiler is broken >&2 && exit 1
   endif

arch/Kconfig

@@ -538,16 +538,10 @@ config HAVE_CC_STACKPROTECTOR
 	  - its compiler supports the -fstack-protector option
 	  - it has implemented a stack canary (e.g. __stack_chk_guard)
 
-config CC_STACKPROTECTOR
-	def_bool n
-	help
-	  Set when a stack-protector mode is enabled, so that the build
-	  can enable kernel-side support for the GCC feature.
-
 choice
 	prompt "Stack Protector buffer overflow detection"
 	depends on HAVE_CC_STACKPROTECTOR
-	default CC_STACKPROTECTOR_NONE
+	default CC_STACKPROTECTOR_AUTO
 	help
 	  This option turns on the "stack-protector" GCC feature. This
 	  feature puts, at the beginning of functions, a canary value on
@@ -564,7 +558,6 @@ config CC_STACKPROTECTOR_NONE
 
 config CC_STACKPROTECTOR_REGULAR
 	bool "Regular"
-	select CC_STACKPROTECTOR
 	help
 	  Functions will have the stack-protector canary logic added if they
 	  have an 8-byte or larger character array on the stack.
@@ -578,7 +571,6 @@ config CC_STACKPROTECTOR_REGULAR
 
 config CC_STACKPROTECTOR_STRONG
 	bool "Strong"
-	select CC_STACKPROTECTOR
 	help
 	  Functions will have the stack-protector canary logic added in any
 	  of the following conditions:
@@ -596,6 +588,12 @@ config CC_STACKPROTECTOR_STRONG
 	  about 20% of all kernel functions, which increases the kernel code
 	  size by about 2%.
 
+config CC_STACKPROTECTOR_AUTO
+	bool "Automatic"
+	help
+	  If the compiler supports it, the best available stack-protector
+	  option will be chosen.
+
 endchoice
 
 config THIN_ARCHIVES

arch/arm/include/asm/bitops.h

@@ -338,6 +338,7 @@ static inline int find_next_bit_le(const void *p, int size, int offset)
 
 #endif
 
+#include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/le.h>
 
 /*

arch/arm64/include/asm/kasan.h

@@ -12,7 +12,8 @@
 
 /*
  * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
- * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses.
+ * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses,
+ * where N = (1 << KASAN_SHADOW_SCALE_SHIFT).
  */
 #define KASAN_SHADOW_START      (VA_START)
 #define KASAN_SHADOW_END        (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
@@ -20,14 +21,16 @@
 /*
  * This value is used to map an address to the corresponding shadow
  * address by the following formula:
- *     shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET;
+ *     shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET
  *
- * (1 << 61) shadow addresses - [KASAN_SHADOW_OFFSET,KASAN_SHADOW_END]
- * cover all 64-bits of virtual addresses. So KASAN_SHADOW_OFFSET
- * should satisfy the following equation:
- *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61)
+ * (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range
+ * [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual
+ * addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation:
+ *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END -
+ *				(1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT))
  */
-#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << (64 - 3)))
+#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << \
+					(64 - KASAN_SHADOW_SCALE_SHIFT)))
 
 void kasan_init(void);
 void kasan_copy_shadow(pgd_t *pgdir);

arch/arm64/include/asm/memory.h

@@ -85,7 +85,8 @@
  * stack size when KASAN is in use.
  */
 #ifdef CONFIG_KASAN
-#define KASAN_SHADOW_SIZE	(UL(1) << (VA_BITS - 3))
+#define KASAN_SHADOW_SCALE_SHIFT 3
+#define KASAN_SHADOW_SIZE	(UL(1) << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
 #define KASAN_THREAD_SHIFT	1
 #else
 #define KASAN_SHADOW_SIZE	(0)

arch/arm64/kernel/perf_event.c

@@ -925,9 +925,8 @@ static void __armv8pmu_probe_pmu(void *info)
 	pmceid[0] = read_sysreg(pmceid0_el0);
 	pmceid[1] = read_sysreg(pmceid1_el0);
 
-	bitmap_from_u32array(cpu_pmu->pmceid_bitmap,
-			     ARMV8_PMUV3_MAX_COMMON_EVENTS, pmceid,
-			     ARRAY_SIZE(pmceid));
+	bitmap_from_arr32(cpu_pmu->pmceid_bitmap,
+			     pmceid, ARMV8_PMUV3_MAX_COMMON_EVENTS);
 }
 
 static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu)

arch/arm64/mm/kasan_init.c

@@ -135,7 +135,8 @@ static void __init kasan_pgd_populate(unsigned long addr, unsigned long end,
 /* The early shadow maps everything to a single page of zeroes */
 asmlinkage void __init kasan_early_init(void)
 {
-	BUILD_BUG_ON(KASAN_SHADOW_OFFSET != KASAN_SHADOW_END - (1UL << 61));
+	BUILD_BUG_ON(KASAN_SHADOW_OFFSET !=
+		KASAN_SHADOW_END - (1UL << (64 - KASAN_SHADOW_SCALE_SHIFT)));
 	BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, PGDIR_SIZE));
 	BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, PGDIR_SIZE));
 	kasan_pgd_populate(KASAN_SHADOW_START, KASAN_SHADOW_END, NUMA_NO_NODE,

arch/ia64/kernel/perfmon.c

@@ -2610,17 +2610,10 @@ pfm_get_task(pfm_context_t *ctx, pid_t pid, struct task_struct **task)
 	if (pid < 2) return -EPERM;
 
 	if (pid != task_pid_vnr(current)) {
-
-		read_lock(&tasklist_lock);
-
-		p = find_task_by_vpid(pid);
-
 		/* make sure task cannot go away while we operate on it */
-		if (p) get_task_struct(p);
-
-		read_unlock(&tasklist_lock);
-
-		if (p == NULL) return -ESRCH;
+		p = find_get_task_by_vpid(pid);
+		if (!p)
+			return -ESRCH;
 	}
 
 	ret = pfm_task_incompatible(ctx, p);

arch/m68k/include/asm/bitops.h

@@ -311,7 +311,6 @@ static inline int bfchg_mem_test_and_change_bit(int nr,
  *	functions.
  */
 #if defined(CONFIG_CPU_HAS_NO_BITFIELDS)
-#include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ffz.h>
 #else
 
@@ -441,6 +440,8 @@ static inline unsigned long ffz(unsigned long word)
 
 #endif
 
+#include <asm-generic/bitops/find.h>
+
 #ifdef __KERNEL__
 
 #if defined(CONFIG_CPU_HAS_NO_BITFIELDS)

arch/score/kernel/setup.c

@@ -124,9 +124,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 {
 	unsigned long n = (unsigned long) v - 1;
 
-	seq_printf(m, "processor\t\t: %ld\n", n);
-	seq_printf(m, "\n");
-
+	seq_printf(m, "processor\t\t: %ld\n\n", n);
 	return 0;
 }
 

arch/unicore32/include/asm/bitops.h

@@ -44,4 +44,6 @@ static inline int fls(int x)
 #define find_first_bit		find_first_bit
 #define find_first_zero_bit	find_first_zero_bit
 
+#include <asm-generic/bitops/find.h>
+
 #endif /* __UNICORE_BITOPS_H__ */

arch/x86/Kconfig

@@ -324,7 +324,7 @@ config X86_64_SMP
 
 config X86_32_LAZY_GS
 	def_bool y
-	depends on X86_32 && !CC_STACKPROTECTOR
+	depends on X86_32 && CC_STACKPROTECTOR_NONE
 
 config ARCH_SUPPORTS_UPROBES
 	def_bool y

arch/x86/include/asm/kasan.h

@@ -4,6 +4,7 @@
 
 #include <linux/const.h>
 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
+#define KASAN_SHADOW_SCALE_SHIFT 3
 
 /*
  * Compiler uses shadow offset assuming that addresses start
@@ -12,12 +13,15 @@
  * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
  */
 #define KASAN_SHADOW_START      (KASAN_SHADOW_OFFSET + \
-					((-1UL << __VIRTUAL_MASK_SHIFT) >> 3))
+					((-1UL << __VIRTUAL_MASK_SHIFT) >> \
+						KASAN_SHADOW_SCALE_SHIFT))
 /*
- * 47 bits for kernel address -> (47 - 3) bits for shadow
- * 56 bits for kernel address -> (56 - 3) bits for shadow
+ * 47 bits for kernel address -> (47 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
+ * 56 bits for kernel address -> (56 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
  */
-#define KASAN_SHADOW_END        (KASAN_SHADOW_START + (1ULL << (__VIRTUAL_MASK_SHIFT - 3)))
+#define KASAN_SHADOW_END        (KASAN_SHADOW_START + \
+					(1ULL << (__VIRTUAL_MASK_SHIFT - \
+						  KASAN_SHADOW_SCALE_SHIFT)))
 
 #ifndef __ASSEMBLY__
 

drivers/perf/arm_dsu_pmu.c

@@ -658,10 +658,8 @@ static void dsu_pmu_probe_pmu(struct dsu_pmu *dsu_pmu)
 		return;
 	cpmceid[0] = __dsu_pmu_read_pmceid(0);
 	cpmceid[1] = __dsu_pmu_read_pmceid(1);
-	bitmap_from_u32array(dsu_pmu->cpmceid_bitmap,
-				DSU_PMU_MAX_COMMON_EVENTS,
-				cpmceid,
-				ARRAY_SIZE(cpmceid));
+	bitmap_from_arr32(dsu_pmu->cpmceid_bitmap, cpmceid,
+			  DSU_PMU_MAX_COMMON_EVENTS);
 }
 
 static void dsu_pmu_set_active_cpu(int cpu, struct dsu_pmu *dsu_pmu)

drivers/pps/generators/pps_gen_parport.c

@@ -70,7 +70,7 @@ static long hrtimer_error = SAFETY_INTERVAL;
 /* the kernel hrtimer event */
 static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 {
-	struct timespec expire_time, ts1, ts2, ts3, dts;
+	struct timespec64 expire_time, ts1, ts2, ts3, dts;
 	struct pps_generator_pp *dev;
 	struct parport *port;
 	long lim, delta;
@@ -78,7 +78,7 @@ static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 
 	/* We have to disable interrupts here. The idea is to prevent
 	 * other interrupts on the same processor to introduce random
-	 * lags while polling the clock. getnstimeofday() takes <1us on
+	 * lags while polling the clock. ktime_get_real_ts64() takes <1us on
 	 * most machines while other interrupt handlers can take much
 	 * more potentially.
 	 *
@@ -88,22 +88,22 @@ static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 	local_irq_save(flags);
 
 	/* first of all we get the time stamp... */
-	getnstimeofday(&ts1);
-	expire_time = ktime_to_timespec(hrtimer_get_softexpires(timer));
+	ktime_get_real_ts64(&ts1);
+	expire_time = ktime_to_timespec64(hrtimer_get_softexpires(timer));
 	dev = container_of(timer, struct pps_generator_pp, timer);
 	lim = NSEC_PER_SEC - send_delay - dev->port_write_time;
 
 	/* check if we are late */
 	if (expire_time.tv_sec != ts1.tv_sec || ts1.tv_nsec > lim) {
 		local_irq_restore(flags);
-		pr_err("we are late this time %ld.%09ld\n",
-				ts1.tv_sec, ts1.tv_nsec);
+		pr_err("we are late this time %lld.%09ld\n",
+				(s64)ts1.tv_sec, ts1.tv_nsec);
 		goto done;
 	}
 
 	/* busy loop until the time is right for an assert edge */
 	do {
-		getnstimeofday(&ts2);
+		ktime_get_real_ts64(&ts2);
 	} while (expire_time.tv_sec == ts2.tv_sec && ts2.tv_nsec < lim);
 
 	/* set the signal */
@@ -113,25 +113,25 @@ static enum hrtimer_restart hrtimer_event(struct hrtimer *timer)
 	/* busy loop until the time is right for a clear edge */
 	lim = NSEC_PER_SEC - dev->port_write_time;
 	do {
-		getnstimeofday(&ts2);
+		ktime_get_real_ts64(&ts2);
 	} while (expire_time.tv_sec == ts2.tv_sec && ts2.tv_nsec < lim);
 
 	/* unset the signal */
 	port->ops->write_control(port, NO_SIGNAL);
 
-	getnstimeofday(&ts3);
+	ktime_get_real_ts64(&ts3);
 
 	local_irq_restore(flags);
 
 	/* update calibrated port write time */
-	dts = timespec_sub(ts3, ts2);
+	dts = timespec64_sub(ts3, ts2);
 	dev->port_write_time =
-		(dev->port_write_time + timespec_to_ns(&dts)) >> 1;
+		(dev->port_write_time + timespec64_to_ns(&dts)) >> 1;
 
 done:
 	/* update calibrated hrtimer error */
-	dts = timespec_sub(ts1, expire_time);
-	delta = timespec_to_ns(&dts);
+	dts = timespec64_sub(ts1, expire_time);
+	delta = timespec64_to_ns(&dts);
 	/* If the new error value is bigger then the old, use the new
 	 * value, if not then slowly move towards the new value. This
 	 * way it should be safe in bad conditions and efficient in
@@ -161,17 +161,17 @@ static void calibrate_port(struct pps_generator_pp *dev)
 	long acc = 0;
 
 	for (i = 0; i < (1 << PORT_NTESTS_SHIFT); i++) {
-		struct timespec a, b;
+		struct timespec64 a, b;
 		unsigned long irq_flags;
 
 		local_irq_save(irq_flags);
-		getnstimeofday(&a);
+		ktime_get_real_ts64(&a);
 		port->ops->write_control(port, NO_SIGNAL);
-		getnstimeofday(&b);
+		ktime_get_real_ts64(&b);
 		local_irq_restore(irq_flags);
 
-		b = timespec_sub(b, a);
-		acc += timespec_to_ns(&b);
+		b = timespec64_sub(b, a);
+		acc += timespec64_to_ns(&b);
 	}
 
 	dev->port_write_time = acc >> PORT_NTESTS_SHIFT;
@@ -180,9 +180,9 @@ static void calibrate_port(struct pps_generator_pp *dev)
 
 static inline ktime_t next_intr_time(struct pps_generator_pp *dev)
 {
-	struct timespec ts;
+	struct timespec64 ts;
 
-	getnstimeofday(&ts);
+	ktime_get_real_ts64(&ts);
 
 	return ktime_set(ts.tv_sec +
 			((ts.tv_nsec > 990 * NSEC_PER_MSEC) ? 1 : 0),

drivers/rapidio/devices/tsi721_dma.c

@@ -222,7 +222,7 @@ static int tsi721_bdma_ch_free(struct tsi721_bdma_chan *bdma_chan)
 	struct tsi721_device *priv = to_tsi721(bdma_chan->dchan.device);
 #endif
 
-	if (bdma_chan->bd_base == NULL)
+	if (!bdma_chan->bd_base)
 		return 0;
 
 	/* Check if DMA channel still running */
@@ -346,7 +346,7 @@ tsi721_desc_fill_init(struct tsi721_tx_desc *desc,
 {
 	u64 rio_addr;
 
-	if (bd_ptr == NULL)
+	if (!bd_ptr)
 		return -EINVAL;
 
 	/* Initialize DMA descriptor */
@@ -370,7 +370,7 @@ tsi721_desc_fill_init(struct tsi721_tx_desc *desc,
 static int
 tsi721_desc_fill_end(struct tsi721_dma_desc *bd_ptr, u32 bcount, bool interrupt)
 {
-	if (bd_ptr == NULL)
+	if (!bd_ptr)
 		return -EINVAL;
 
 	/* Update DMA descriptor */
@@ -555,9 +555,7 @@ static void tsi721_advance_work(struct tsi721_bdma_chan *bdma_chan,
 	 * If there is no data transfer in progress, fetch new descriptor from
 	 * the pending queue.
 	*/
-
-	if (desc == NULL && bdma_chan->active_tx == NULL &&
-					!list_empty(&bdma_chan->queue)) {
+	if (!desc && !bdma_chan->active_tx && !list_empty(&bdma_chan->queue)) {
 		desc = list_first_entry(&bdma_chan->queue,
 					struct tsi721_tx_desc, desc_node);
 		list_del_init((&desc->desc_node));
@@ -735,7 +733,7 @@ static dma_cookie_t tsi721_tx_submit(struct dma_async_tx_descriptor *txd)
 static int tsi721_alloc_chan_resources(struct dma_chan *dchan)
 {
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-	struct tsi721_tx_desc *desc = NULL;
+	struct tsi721_tx_desc *desc;
 	int i;
 
 	tsi_debug(DMA, &dchan->dev->device, "DMAC%d", bdma_chan->id);
@@ -754,9 +752,6 @@ static int tsi721_alloc_chan_resources(struct dma_chan *dchan)
 	desc = kcalloc(dma_txqueue_sz, sizeof(struct tsi721_tx_desc),
 			GFP_ATOMIC);
 	if (!desc) {
-		tsi_err(&dchan->dev->device,
-			"DMAC%d Failed to allocate logical descriptors",
-			bdma_chan->id);
 		tsi721_bdma_ch_free(bdma_chan);
 		return -ENOMEM;
 	}
@@ -799,7 +794,7 @@ static void tsi721_free_chan_resources(struct dma_chan *dchan)
 
 	tsi_debug(DMA, &dchan->dev->device, "DMAC%d", bdma_chan->id);
 
-	if (bdma_chan->bd_base == NULL)
+	if (!bdma_chan->bd_base)
 		return;
 
 	tsi721_bdma_interrupt_enable(bdma_chan, 0);

drivers/rapidio/rio.c

@@ -81,6 +81,7 @@ u16 rio_local_get_device_id(struct rio_mport *port)
 
 	return (RIO_GET_DID(port->sys_size, result));
 }
+EXPORT_SYMBOL_GPL(rio_local_get_device_id);
 
 /**
  * rio_query_mport - Query mport device attributes
@@ -110,9 +111,8 @@ EXPORT_SYMBOL(rio_query_mport);
  */
 struct rio_net *rio_alloc_net(struct rio_mport *mport)
 {
-	struct rio_net *net;
+	struct rio_net *net = kzalloc(sizeof(*net), GFP_KERNEL);
 
-	net = kzalloc(sizeof(struct rio_net), GFP_KERNEL);
 	if (net) {
 		INIT_LIST_HEAD(&net->node);
 		INIT_LIST_HEAD(&net->devices);
@@ -243,18 +243,17 @@ int rio_request_inb_mbox(struct rio_mport *mport,
 	int rc = -ENOSYS;
 	struct resource *res;
 
-	if (mport->ops->open_inb_mbox == NULL)
+	if (!mport->ops->open_inb_mbox)
 		goto out;
 
-	res = kzalloc(sizeof(struct resource), GFP_KERNEL);
-
+	res = kzalloc(sizeof(*res), GFP_KERNEL);
 	if (res) {
 		rio_init_mbox_res(res, mbox, mbox);
 
 		/* Make sure this mailbox isn't in use */
-		if ((rc =
-		     request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
-				      res)) < 0) {
+		rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
+				      res);
+		if (rc < 0) {
 			kfree(res);
 			goto out;
 		}
@@ -277,6 +276,7 @@ int rio_request_inb_mbox(struct rio_mport *mport,
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
 
 /**
  * rio_release_inb_mbox - release inbound mailbox message service
@@ -305,6 +305,7 @@ int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
 
 /**
  * rio_request_outb_mbox - request outbound mailbox service
@@ -326,18 +327,17 @@ int rio_request_outb_mbox(struct rio_mport *mport,
 	int rc = -ENOSYS;
 	struct resource *res;
 
-	if (mport->ops->open_outb_mbox == NULL)
+	if (!mport->ops->open_outb_mbox)
 		goto out;
 
-	res = kzalloc(sizeof(struct resource), GFP_KERNEL);
-
+	res = kzalloc(sizeof(*res), GFP_KERNEL);
 	if (res) {
 		rio_init_mbox_res(res, mbox, mbox);
 
 		/* Make sure this outbound mailbox isn't in use */
-		if ((rc =
-		     request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
-				      res)) < 0) {
+		rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
+				      res);
+		if (rc < 0) {
 			kfree(res);
 			goto out;
 		}
@@ -360,6 +360,7 @@ int rio_request_outb_mbox(struct rio_mport *mport,
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
 
 /**
  * rio_release_outb_mbox - release outbound mailbox message service
@@ -388,6 +389,7 @@ int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
 
 /**
  * rio_setup_inb_dbell - bind inbound doorbell callback
@@ -405,13 +407,10 @@ rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
 		    void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
 				  u16 info))
 {
-	int rc = 0;
-	struct rio_dbell *dbell;
+	struct rio_dbell *dbell = kmalloc(sizeof(*dbell), GFP_KERNEL);
 
-	if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
-		rc = -ENOMEM;
-		goto out;
-	}
+	if (!dbell)
+		return -ENOMEM;
 
 	dbell->res = res;
 	dbell->dinb = dinb;
@@ -420,9 +419,7 @@ rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
 	mutex_lock(&mport->lock);
 	list_add_tail(&dbell->node, &mport->dbells);
 	mutex_unlock(&mport->lock);
-
-      out:
-	return rc;
+	return 0;
 }
 
 /**
@@ -444,17 +441,16 @@ int rio_request_inb_dbell(struct rio_mport *mport,
 			  void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
 					u16 dst, u16 info))
 {
-	int rc = 0;
-
-	struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+	int rc;
+	struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
 
 	if (res) {
 		rio_init_dbell_res(res, start, end);
 
 		/* Make sure these doorbells aren't in use */
-		if ((rc =
-		     request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
-				      res)) < 0) {
+		rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
+				      res);
+		if (rc < 0) {
 			kfree(res);
 			goto out;
 		}
@@ -467,6 +463,7 @@ int rio_request_inb_dbell(struct rio_mport *mport,
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
 
 /**
  * rio_release_inb_dbell - release inbound doorbell message service
@@ -508,6 +505,7 @@ int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
       out:
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
 
 /**
  * rio_request_outb_dbell - request outbound doorbell message range
@@ -536,6 +534,7 @@ struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
 
 	return res;
 }
+EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
 
 /**
  * rio_release_outb_dbell - release outbound doorbell message range
@@ -553,6 +552,7 @@ int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
 
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
 
 /**
  * rio_add_mport_pw_handler - add port-write message handler into the list
@@ -567,22 +567,17 @@ int rio_add_mport_pw_handler(struct rio_mport *mport, void *context,
 			     int (*pwcback)(struct rio_mport *mport,
 			     void *context, union rio_pw_msg *msg, int step))
 {
-	int rc = 0;
-	struct rio_pwrite *pwrite;
+	struct rio_pwrite *pwrite = kzalloc(sizeof(*pwrite), GFP_KERNEL);
 
-	pwrite = kzalloc(sizeof(struct rio_pwrite), GFP_KERNEL);
-	if (!pwrite) {
-		rc = -ENOMEM;
-		goto out;
-	}
+	if (!pwrite)
+		return -ENOMEM;
 
 	pwrite->pwcback = pwcback;
 	pwrite->context = context;
 	mutex_lock(&mport->lock);
 	list_add_tail(&pwrite->node, &mport->pwrites);
 	mutex_unlock(&mport->lock);
-out:
-	return rc;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(rio_add_mport_pw_handler);
 
@@ -632,7 +627,7 @@ int rio_request_inb_pwrite(struct rio_dev *rdev,
 	int rc = 0;
 
 	spin_lock(&rio_global_list_lock);
-	if (rdev->pwcback != NULL)
+	if (rdev->pwcback)
 		rc = -ENOMEM;
 	else
 		rdev->pwcback = pwcback;
@@ -698,7 +693,7 @@ EXPORT_SYMBOL_GPL(rio_pw_enable);
 int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
 			u64 rbase, u32 size, u32 rflags)
 {
-	int rc = 0;
+	int rc;
 	unsigned long flags;
 
 	if (!mport->ops->map_inb)
@@ -742,7 +737,7 @@ EXPORT_SYMBOL_GPL(rio_unmap_inb_region);
 int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase,
 			u32 size, u32 rflags, dma_addr_t *local)
 {
-	int rc = 0;
+	int rc;
 	unsigned long flags;
 
 	if (!mport->ops->map_outb)
@@ -975,7 +970,7 @@ rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum)
 		rdev = rdev->prev;
 	}
 
-	if (prev == NULL)
+	if (!prev)
 		goto err_out;
 
 	p_port = prev->rswitch->route_table[rdev->destid];
@@ -1054,7 +1049,7 @@ rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
 		RIO_MNT_REQ_CMD_IS);
 
 	/* Exit if the response is not expected */
-	if (lnkresp == NULL)
+	if (!lnkresp)
 		return 0;
 
 	checkcount = 3;
@@ -1411,7 +1406,9 @@ rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
 						 ext_ftr_ptr, &ftr_header);
 		if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
 			return ext_ftr_ptr;
-		if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
+
+		ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header);
+		if (!ext_ftr_ptr)
 			break;
 	}
 
@@ -1462,6 +1459,7 @@ struct rio_dev *rio_get_asm(u16 vid, u16 did,
 	spin_unlock(&rio_global_list_lock);
 	return rdev;
 }
+EXPORT_SYMBOL_GPL(rio_get_asm);
 
 /**
  * rio_get_device - Begin or continue searching for a RIO device by vid/did
@@ -1481,6 +1479,7 @@ struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
 {
 	return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
 }
+EXPORT_SYMBOL_GPL(rio_get_device);
 
 /**
  * rio_std_route_add_entry - Add switch route table entry using standard
@@ -1696,7 +1695,7 @@ int rio_route_add_entry(struct rio_dev *rdev,
 
 	spin_lock(&rdev->rswitch->lock);
 
-	if (ops == NULL || ops->add_entry == NULL) {
+	if (!ops || !ops->add_entry) {
 		rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid,
 					     rdev->hopcount, table,
 					     route_destid, route_port);
@@ -1749,7 +1748,7 @@ int rio_route_get_entry(struct rio_dev *rdev, u16 table,
 
 	spin_lock(&rdev->rswitch->lock);
 
-	if (ops == NULL || ops->get_entry == NULL) {
+	if (!ops || !ops->get_entry) {
 		rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid,
 					     rdev->hopcount, table,
 					     route_destid, route_port);
@@ -1797,7 +1796,7 @@ int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock)
 
 	spin_lock(&rdev->rswitch->lock);
 
-	if (ops == NULL || ops->clr_table == NULL) {
+	if (!ops || !ops->clr_table) {
 		rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid,
 					     rdev->hopcount, table);
 	} else if (try_module_get(ops->owner)) {
@@ -1889,7 +1888,7 @@ struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan,
 {
 	struct rio_dma_ext rio_ext;
 
-	if (dchan->device->device_prep_slave_sg == NULL) {
+	if (!dchan->device->device_prep_slave_sg) {
 		pr_err("%s: prep_rio_sg == NULL\n", __func__);
 		return NULL;
 	}
@@ -2189,7 +2188,6 @@ int rio_init_mports(void)
 
 	work = kcalloc(n, sizeof *work, GFP_KERNEL);
 	if (!work) {
-		pr_err("RIO: no memory for work struct\n");
 		destroy_workqueue(rio_wq);
 		goto no_disc;
 	}
@@ -2216,6 +2214,7 @@ no_disc:
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(rio_init_mports);
 
 static int rio_get_hdid(int index)
 {
@@ -2330,16 +2329,3 @@ int rio_unregister_mport(struct rio_mport *port)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rio_unregister_mport);
-
-EXPORT_SYMBOL_GPL(rio_local_get_device_id);
-EXPORT_SYMBOL_GPL(rio_get_device);
-EXPORT_SYMBOL_GPL(rio_get_asm);
-EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
-EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
-EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
-EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
-EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
-EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
-EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
-EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
-EXPORT_SYMBOL_GPL(rio_init_mports);

fs/binfmt_elf.c

@@ -1599,6 +1599,8 @@ static int fill_files_note(struct memelfnote *note)
 
 	/* *Estimated* file count and total data size needed */
 	count = current->mm->map_count;
+	if (count > UINT_MAX / 64)
+		return -EINVAL;
 	size = count * 64;
 
 	names_ofs = (2 + 3 * count) * sizeof(data[0]);

fs/hfsplus/dir.c

@@ -444,7 +444,7 @@ static int hfsplus_symlink(struct inode *dir, struct dentry *dentry,
 	int res = -ENOMEM;
 
 	mutex_lock(&sbi->vh_mutex);
-	inode = hfsplus_new_inode(dir->i_sb, S_IFLNK | S_IRWXUGO);
+	inode = hfsplus_new_inode(dir->i_sb, dir, S_IFLNK | S_IRWXUGO);
 	if (!inode)
 		goto out;
 
@@ -486,7 +486,7 @@ static int hfsplus_mknod(struct inode *dir, struct dentry *dentry,
 	int res = -ENOMEM;
 
 	mutex_lock(&sbi->vh_mutex);
-	inode = hfsplus_new_inode(dir->i_sb, mode);
+	inode = hfsplus_new_inode(dir->i_sb, dir, mode);
 	if (!inode)
 		goto out;
 

fs/hfsplus/hfsplus_fs.h

@@ -478,7 +478,8 @@ extern const struct address_space_operations hfsplus_aops;
 extern const struct address_space_operations hfsplus_btree_aops;
 extern const struct dentry_operations hfsplus_dentry_operations;
 
-struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode);
+struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
+				umode_t mode);
 void hfsplus_delete_inode(struct inode *inode);
 void hfsplus_inode_read_fork(struct inode *inode,
 			     struct hfsplus_fork_raw *fork);

fs/hfsplus/inode.c

@@ -354,7 +354,8 @@ static const struct file_operations hfsplus_file_operations = {
 	.unlocked_ioctl = hfsplus_ioctl,
 };
 
-struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
+struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
+				umode_t mode)
 {
 	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
 	struct inode *inode = new_inode(sb);
@@ -364,9 +365,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
 		return NULL;
 
 	inode->i_ino = sbi->next_cnid++;
-	inode->i_mode = mode;
-	inode->i_uid = current_fsuid();
-	inode->i_gid = current_fsgid();
+	inode_init_owner(inode, dir, mode);
 	set_nlink(inode, 1);
 	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 

fs/hfsplus/super.c

@@ -549,7 +549,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 
 		if (!sbi->hidden_dir) {
 			mutex_lock(&sbi->vh_mutex);
-			sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
+			sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR);
 			if (!sbi->hidden_dir) {
 				mutex_unlock(&sbi->vh_mutex);
 				err = -ENOMEM;

fs/inode.c

@@ -498,7 +498,6 @@ EXPORT_SYMBOL(__remove_inode_hash);
 
 void clear_inode(struct inode *inode)
 {
-	might_sleep();
 	/*
 	 * We have to cycle tree_lock here because reclaim can be still in the
 	 * process of removing the last page (in __delete_from_page_cache())

fs/nilfs2/segbuf.c

@@ -130,7 +130,7 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf,
 }
 
 int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned int flags,
-		       time_t ctime, __u64 cno)
+		       time64_t ctime, __u64 cno)
 {
 	int err;
 

fs/nilfs2/segbuf.h

@@ -46,7 +46,7 @@ struct nilfs_segsum_info {
 	unsigned long		nfileblk;
 	u64			seg_seq;
 	__u64			cno;
-	time_t			ctime;
+	time64_t		ctime;
 	sector_t		next;
 };
 
@@ -120,7 +120,7 @@ void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf,
 			   struct nilfs_segment_buffer *prev);
 void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *, __u64,
 				  struct the_nilfs *);
-int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned int, time_t,
+int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned int, time64_t,
 		       __u64);
 int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *);
 int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *,

fs/nilfs2/segment.c

@@ -2040,7 +2040,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode)
 			goto out;
 
 		/* Update time stamp */
-		sci->sc_seg_ctime = get_seconds();
+		sci->sc_seg_ctime = ktime_get_real_seconds();
 
 		err = nilfs_segctor_collect(sci, nilfs, mode);
 		if (unlikely(err))

fs/nilfs2/segment.h

@@ -157,7 +157,7 @@ struct nilfs_sc_info {
 	unsigned long		sc_blk_cnt;
 	unsigned long		sc_datablk_cnt;
 	unsigned long		sc_nblk_this_inc;
-	time_t			sc_seg_ctime;
+	time64_t		sc_seg_ctime;
 	__u64			sc_cno;
 	unsigned long		sc_flags;
 

fs/nilfs2/sufile.c

@@ -526,7 +526,7 @@ int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum)
  * @modtime: modification time (option)
  */
 int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
-				   unsigned long nblocks, time_t modtime)
+				   unsigned long nblocks, time64_t modtime)
 {
 	struct buffer_head *bh;
 	struct nilfs_segment_usage *su;

fs/nilfs2/sufile.h

@@ -35,7 +35,7 @@ int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end);
 int nilfs_sufile_alloc(struct inode *, __u64 *);
 int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
 int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
-				   unsigned long nblocks, time_t modtime);
+				   unsigned long nblocks, time64_t modtime);
 int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
 ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int,
 				size_t);

fs/nilfs2/super.c

@@ -283,10 +283,10 @@ int nilfs_commit_super(struct super_block *sb, int flag)
 {
 	struct the_nilfs *nilfs = sb->s_fs_info;
 	struct nilfs_super_block **sbp = nilfs->ns_sbp;
-	time_t t;
+	time64_t t;
 
 	/* nilfs->ns_sem must be locked by the caller. */
-	t = get_seconds();
+	t = ktime_get_real_seconds();
 	nilfs->ns_sbwtime = t;
 	sbp[0]->s_wtime = cpu_to_le64(t);
 	sbp[0]->s_sum = 0;

fs/nilfs2/sysfs.c

@@ -31,7 +31,7 @@ static struct kset *nilfs_kset;
 #define NILFS_SHOW_TIME(time_t_val, buf) ({ \
 		struct tm res; \
 		int count = 0; \
-		time_to_tm(time_t_val, 0, &res); \
+		time64_to_tm(time_t_val, 0, &res); \
 		res.tm_year += 1900; \
 		res.tm_mon += 1; \
 		count = scnprintf(buf, PAGE_SIZE, \
@@ -579,7 +579,7 @@ nilfs_segctor_last_seg_write_time_show(struct nilfs_segctor_attr *attr,
 					struct the_nilfs *nilfs,
 					char *buf)
 {
-	time_t ctime;
+	time64_t ctime;
 
 	down_read(&nilfs->ns_segctor_sem);
 	ctime = nilfs->ns_ctime;
@@ -593,13 +593,13 @@ nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr,
 					    struct the_nilfs *nilfs,
 					    char *buf)
 {
-	time_t ctime;
+	time64_t ctime;
 
 	down_read(&nilfs->ns_segctor_sem);
 	ctime = nilfs->ns_ctime;
 	up_read(&nilfs->ns_segctor_sem);
 
-	return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)ctime);
+	return snprintf(buf, PAGE_SIZE, "%llu\n", ctime);
 }
 
 static ssize_t
@@ -607,7 +607,7 @@ nilfs_segctor_last_nongc_write_time_show(struct nilfs_segctor_attr *attr,
 					 struct the_nilfs *nilfs,
 					 char *buf)
 {
-	time_t nongc_ctime;
+	time64_t nongc_ctime;
 
 	down_read(&nilfs->ns_segctor_sem);
 	nongc_ctime = nilfs->ns_nongc_ctime;
@@ -621,14 +621,13 @@ nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr,
 						struct the_nilfs *nilfs,
 						char *buf)
 {
-	time_t nongc_ctime;
+	time64_t nongc_ctime;
 
 	down_read(&nilfs->ns_segctor_sem);
 	nongc_ctime = nilfs->ns_nongc_ctime;
 	up_read(&nilfs->ns_segctor_sem);
 
-	return snprintf(buf, PAGE_SIZE, "%llu\n",
-			(unsigned long long)nongc_ctime);
+	return snprintf(buf, PAGE_SIZE, "%llu\n", nongc_ctime);
 }
 
 static ssize_t
@@ -728,7 +727,7 @@ nilfs_superblock_sb_write_time_show(struct nilfs_superblock_attr *attr,
 				     struct the_nilfs *nilfs,
 				     char *buf)
 {
-	time_t sbwtime;
+	time64_t sbwtime;
 
 	down_read(&nilfs->ns_sem);
 	sbwtime = nilfs->ns_sbwtime;
@@ -742,13 +741,13 @@ nilfs_superblock_sb_write_time_secs_show(struct nilfs_superblock_attr *attr,
 					 struct the_nilfs *nilfs,
 					 char *buf)
 {
-	time_t sbwtime;
+	time64_t sbwtime;
 
 	down_read(&nilfs->ns_sem);
 	sbwtime = nilfs->ns_sbwtime;
 	up_read(&nilfs->ns_sem);
 
-	return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)sbwtime);
+	return snprintf(buf, PAGE_SIZE, "%llu\n", sbwtime);
 }
 
 static ssize_t

fs/nilfs2/the_nilfs.h

@@ -116,7 +116,7 @@ struct the_nilfs {
 	 */
 	struct buffer_head     *ns_sbh[2];
 	struct nilfs_super_block *ns_sbp[2];
-	time_t			ns_sbwtime;
+	time64_t		ns_sbwtime;
 	unsigned int		ns_sbwcount;
 	unsigned int		ns_sbsize;
 	unsigned int		ns_mount_state;
@@ -131,8 +131,8 @@ struct the_nilfs {
 	__u64			ns_nextnum;
 	unsigned long		ns_pseg_offset;
 	__u64			ns_cno;
-	time_t			ns_ctime;
-	time_t			ns_nongc_ctime;
+	time64_t		ns_ctime;
+	time64_t		ns_nongc_ctime;
 	atomic_t		ns_ndirtyblks;
 
 	/*
@@ -267,7 +267,7 @@ struct nilfs_root {
 
 static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
 {
-	u64 t = get_seconds();
+	u64 t = ktime_get_real_seconds();
 
 	return t < nilfs->ns_sbwtime ||
 		t > nilfs->ns_sbwtime + nilfs->ns_sb_update_freq;

fs/pipe.c

@@ -35,11 +35,6 @@
  */
 unsigned int pipe_max_size = 1048576;
 
-/*
- * Minimum pipe size, as required by POSIX
- */
-unsigned int pipe_min_size = PAGE_SIZE;
-
 /* Maximum allocatable pages per user. Hard limit is unset by default, soft
  * matches default values.
  */
@@ -610,12 +605,21 @@ static unsigned long account_pipe_buffers(struct user_struct *user,
 
 static bool too_many_pipe_buffers_soft(unsigned long user_bufs)
 {
-	return pipe_user_pages_soft && user_bufs >= pipe_user_pages_soft;
+	unsigned long soft_limit = READ_ONCE(pipe_user_pages_soft);
+
+	return soft_limit && user_bufs > soft_limit;
 }
 
 static bool too_many_pipe_buffers_hard(unsigned long user_bufs)
 {
-	return pipe_user_pages_hard && user_bufs >= pipe_user_pages_hard;
+	unsigned long hard_limit = READ_ONCE(pipe_user_pages_hard);
+
+	return hard_limit && user_bufs > hard_limit;
+}
+
+static bool is_unprivileged_user(void)
+{
+	return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);
 }
 
 struct pipe_inode_info *alloc_pipe_info(void)
@@ -624,22 +628,23 @@ struct pipe_inode_info *alloc_pipe_info(void)
 	unsigned long pipe_bufs = PIPE_DEF_BUFFERS;
 	struct user_struct *user = get_current_user();
 	unsigned long user_bufs;
+	unsigned int max_size = READ_ONCE(pipe_max_size);
 
 	pipe = kzalloc(sizeof(struct pipe_inode_info), GFP_KERNEL_ACCOUNT);
 	if (pipe == NULL)
 		goto out_free_uid;
 
-	if (pipe_bufs * PAGE_SIZE > pipe_max_size && !capable(CAP_SYS_RESOURCE))
-		pipe_bufs = pipe_max_size >> PAGE_SHIFT;
+	if (pipe_bufs * PAGE_SIZE > max_size && !capable(CAP_SYS_RESOURCE))
+		pipe_bufs = max_size >> PAGE_SHIFT;
 
 	user_bufs = account_pipe_buffers(user, 0, pipe_bufs);
 
-	if (too_many_pipe_buffers_soft(user_bufs)) {
+	if (too_many_pipe_buffers_soft(user_bufs) && is_unprivileged_user()) {
 		user_bufs = account_pipe_buffers(user, pipe_bufs, 1);
 		pipe_bufs = 1;
 	}
 
-	if (too_many_pipe_buffers_hard(user_bufs))
+	if (too_many_pipe_buffers_hard(user_bufs) && is_unprivileged_user())
 		goto out_revert_acct;
 
 	pipe->bufs = kcalloc(pipe_bufs, sizeof(struct pipe_buffer),
@@ -1020,18 +1025,16 @@ const struct file_operations pipefifo_fops = {
  * Currently we rely on the pipe array holding a power-of-2 number
  * of pages. Returns 0 on error.
  */
-unsigned int round_pipe_size(unsigned int size)
+unsigned int round_pipe_size(unsigned long size)
 {
-	unsigned long nr_pages;
-
-	if (size < pipe_min_size)
-		size = pipe_min_size;
-
-	nr_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
-	if (nr_pages == 0)
+	if (size > (1U << 31))
 		return 0;
 
-	return roundup_pow_of_two(nr_pages) << PAGE_SHIFT;
+	/* Minimum pipe size, as required by POSIX */
+	if (size < PAGE_SIZE)
+		return PAGE_SIZE;
+
+	return roundup_pow_of_two(size);
 }
 
 /*
@@ -1046,8 +1049,6 @@ static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long arg)
 	long ret = 0;
 
 	size = round_pipe_size(arg);
-	if (size == 0)
-		return -EINVAL;
 	nr_pages = size >> PAGE_SHIFT;
 
 	if (!nr_pages)
@@ -1069,7 +1070,7 @@ static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long arg)
 	if (nr_pages > pipe->buffers &&
 			(too_many_pipe_buffers_hard(user_bufs) ||
 			 too_many_pipe_buffers_soft(user_bufs)) &&
-			!capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN)) {
+			is_unprivileged_user()) {
 		ret = -EPERM;
 		goto out_revert_acct;
 	}
@@ -1124,16 +1125,6 @@ out_revert_acct:
 	return ret;
 }
 
-/*
- * This should work even if CONFIG_PROC_FS isn't set, as proc_dopipe_max_size
- * will return an error.
- */
-int pipe_proc_fn(struct ctl_table *table, int write, void __user *buf,
-		 size_t *lenp, loff_t *ppos)
-{
-	return proc_dopipe_max_size(table, write, buf, lenp, ppos);
-}
-
 /*
  * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
  * location, so checking ->i_pipe is not enough to verify that this is a

fs/proc/array.c

@@ -736,16 +736,10 @@ static int children_seq_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-int children_seq_release(struct inode *inode, struct file *file)
-{
-	seq_release(inode, file);
-	return 0;
-}
-
 const struct file_operations proc_tid_children_operations = {
 	.open    = children_seq_open,
 	.read    = seq_read,
 	.llseek  = seq_lseek,
-	.release = children_seq_release,
+	.release = seq_release,
 };
 #endif /* CONFIG_PROC_CHILDREN */

fs/proc/base.c

@@ -75,6 +75,7 @@
 #include <linux/ptrace.h>
 #include <linux/tracehook.h>
 #include <linux/printk.h>
+#include <linux/cache.h>
 #include <linux/cgroup.h>
 #include <linux/cpuset.h>
 #include <linux/audit.h>
@@ -100,6 +101,8 @@
 #include "internal.h"
 #include "fd.h"
 
+#include "../../lib/kstrtox.h"
+
 /* NOTE:
  *	Implementing inode permission operations in /proc is almost
  *	certainly an error.  Permission checks need to happen during
@@ -110,8 +113,8 @@
  *	in /proc for a task before it execs a suid executable.
  */
 
-static u8 nlink_tid;
-static u8 nlink_tgid;
+static u8 nlink_tid __ro_after_init;
+static u8 nlink_tgid __ro_after_init;
 
 struct pid_entry {
 	const char *name;
@@ -1370,7 +1373,7 @@ static ssize_t proc_fail_nth_write(struct file *file, const char __user *buf,
 	task = get_proc_task(file_inode(file));
 	if (!task)
 		return -ESRCH;
-	WRITE_ONCE(task->fail_nth, n);
+	task->fail_nth = n;
 	put_task_struct(task);
 
 	return count;
@@ -1386,8 +1389,7 @@ static ssize_t proc_fail_nth_read(struct file *file, char __user *buf,
 	task = get_proc_task(file_inode(file));
 	if (!task)
 		return -ESRCH;
-	len = snprintf(numbuf, sizeof(numbuf), "%u\n",
-			READ_ONCE(task->fail_nth));
+	len = snprintf(numbuf, sizeof(numbuf), "%u\n", task->fail_nth);
 	len = simple_read_from_buffer(buf, count, ppos, numbuf, len);
 	put_task_struct(task);
 
@@ -1907,8 +1909,33 @@ end_instantiate:
 static int dname_to_vma_addr(struct dentry *dentry,
 			     unsigned long *start, unsigned long *end)
 {
-	if (sscanf(dentry->d_name.name, "%lx-%lx", start, end) != 2)
+	const char *str = dentry->d_name.name;
+	unsigned long long sval, eval;
+	unsigned int len;
+
+	len = _parse_integer(str, 16, &sval);
+	if (len & KSTRTOX_OVERFLOW)
+		return -EINVAL;
+	if (sval != (unsigned long)sval)
 		return -EINVAL;
+	str += len;
+
+	if (*str != '-')
+		return -EINVAL;
+	str++;
+
+	len = _parse_integer(str, 16, &eval);
+	if (len & KSTRTOX_OVERFLOW)
+		return -EINVAL;
+	if (eval != (unsigned long)eval)
+		return -EINVAL;
+	str += len;
+
+	if (*str != '\0')
+		return -EINVAL;
+
+	*start = sval;
+	*end = eval;
 
 	return 0;
 }
@@ -2000,9 +2027,9 @@ out:
 }
 
 struct map_files_info {
+	unsigned long	start;
+	unsigned long	end;
 	fmode_t		mode;
-	unsigned int	len;
-	unsigned char	name[4*sizeof(long)+2]; /* max: %lx-%lx\0 */
 };
 
 /*
@@ -2172,10 +2199,9 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 			if (++pos <= ctx->pos)
 				continue;
 
+			info.start = vma->vm_start;
+			info.end = vma->vm_end;
 			info.mode = vma->vm_file->f_mode;
-			info.len = snprintf(info.name,
-					sizeof(info.name), "%lx-%lx",
-					vma->vm_start, vma->vm_end);
 			if (flex_array_put(fa, i++, &info, GFP_KERNEL))
 				BUG();
 		}
@@ -2183,9 +2209,13 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 	up_read(&mm->mmap_sem);
 
 	for (i = 0; i < nr_files; i++) {
+		char buf[4 * sizeof(long) + 2];	/* max: %lx-%lx\0 */
+		unsigned int len;
+
 		p = flex_array_get(fa, i);
+		len = snprintf(buf, sizeof(buf), "%lx-%lx", p->start, p->end);
 		if (!proc_fill_cache(file, ctx,
-				      p->name, p->len,
+				      buf, len,
 				      proc_map_files_instantiate,
 				      task,
 				      (void *)(unsigned long)p->mode))
@@ -3018,11 +3048,11 @@ static const struct inode_operations proc_tgid_base_inode_operations = {
 static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
 {
 	struct dentry *dentry, *leader, *dir;
-	char buf[PROC_NUMBUF];
+	char buf[10 + 1];
 	struct qstr name;
 
 	name.name = buf;
-	name.len = snprintf(buf, sizeof(buf), "%d", pid);
+	name.len = snprintf(buf, sizeof(buf), "%u", pid);
 	/* no ->d_hash() rejects on procfs */
 	dentry = d_hash_and_lookup(mnt->mnt_root, &name);
 	if (dentry) {
@@ -3034,7 +3064,7 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
 		return;
 
 	name.name = buf;
-	name.len = snprintf(buf, sizeof(buf), "%d", tgid);
+	name.len = snprintf(buf, sizeof(buf), "%u", tgid);
 	leader = d_hash_and_lookup(mnt->mnt_root, &name);
 	if (!leader)
 		goto out;
@@ -3046,7 +3076,7 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
 		goto out_put_leader;
 
 	name.name = buf;
-	name.len = snprintf(buf, sizeof(buf), "%d", pid);
+	name.len = snprintf(buf, sizeof(buf), "%u", pid);
 	dentry = d_hash_and_lookup(dir, &name);
 	if (dentry) {
 		d_invalidate(dentry);
@@ -3225,14 +3255,14 @@ int proc_pid_readdir(struct file *file, struct dir_context *ctx)
 	for (iter = next_tgid(ns, iter);
 	     iter.task;
 	     iter.tgid += 1, iter = next_tgid(ns, iter)) {
-		char name[PROC_NUMBUF];
+		char name[10 + 1];
 		int len;
 
 		cond_resched();
 		if (!has_pid_permissions(ns, iter.task, HIDEPID_INVISIBLE))
 			continue;
 
-		len = snprintf(name, sizeof(name), "%d", iter.tgid);
+		len = snprintf(name, sizeof(name), "%u", iter.tgid);
 		ctx->pos = iter.tgid + TGID_OFFSET;
 		if (!proc_fill_cache(file, ctx, name, len,
 				     proc_pid_instantiate, iter.task, NULL)) {
@@ -3560,10 +3590,10 @@ static int proc_task_readdir(struct file *file, struct dir_context *ctx)
 	for (task = first_tid(proc_pid(inode), tid, ctx->pos - 2, ns);
 	     task;
 	     task = next_tid(task), ctx->pos++) {
-		char name[PROC_NUMBUF];
+		char name[10 + 1];
 		int len;
 		tid = task_pid_nr_ns(task, ns);
-		len = snprintf(name, sizeof(name), "%d", tid);
+		len = snprintf(name, sizeof(name), "%u", tid);
 		if (!proc_fill_cache(file, ctx, name, len,
 				proc_task_instantiate, task, NULL)) {
 			/* returning this tgid failed, save it as the first

fs/proc/consoles.c

@@ -55,8 +55,7 @@ static int show_console_dev(struct seq_file *m, void *v)
 	if (dev)
 		seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev));
 
-	seq_printf(m, "\n");
-
+	seq_putc(m, '\n');
 	return 0;
 }
 

fs/proc/fd.c

@@ -236,7 +236,7 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
 	for (fd = ctx->pos - 2;
 	     fd < files_fdtable(files)->max_fds;
 	     fd++, ctx->pos++) {
-		char name[PROC_NUMBUF];
+		char name[10 + 1];
 		int len;
 
 		if (!fcheck_files(files, fd))

fs/proc/generic.c

@@ -28,7 +28,7 @@
 
 static DEFINE_RWLOCK(proc_subdir_lock);
 
-static int proc_match(unsigned int len, const char *name, struct proc_dir_entry *de)
+static int proc_match(const char *name, struct proc_dir_entry *de, unsigned int len)
 {
 	if (len < de->namelen)
 		return -1;
@@ -60,7 +60,7 @@ static struct proc_dir_entry *pde_subdir_find(struct proc_dir_entry *dir,
 		struct proc_dir_entry *de = rb_entry(node,
 						     struct proc_dir_entry,
 						     subdir_node);
-		int result = proc_match(len, name, de);
+		int result = proc_match(name, de, len);
 
 		if (result < 0)
 			node = node->rb_left;
@@ -84,7 +84,7 @@ static bool pde_subdir_insert(struct proc_dir_entry *dir,
 		struct proc_dir_entry *this = rb_entry(*new,
 						       struct proc_dir_entry,
 						       subdir_node);
-		int result = proc_match(de->namelen, de->name, this);
+		int result = proc_match(de->name, this, de->namelen);
 
 		parent = *new;
 		if (result < 0)
@@ -211,8 +211,8 @@ void proc_free_inum(unsigned int inum)
  * Don't create negative dentries here, return -ENOENT by hand
  * instead.
  */
-struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
-		struct dentry *dentry)
+struct dentry *proc_lookup_de(struct inode *dir, struct dentry *dentry,
+			      struct proc_dir_entry *de)
 {
 	struct inode *inode;
 
@@ -235,7 +235,7 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
 struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
 		unsigned int flags)
 {
-	return proc_lookup_de(PDE(dir), dir, dentry);
+	return proc_lookup_de(dir, dentry, PDE(dir));
 }
 
 /*
@@ -247,8 +247,8 @@ struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
  * value of the readdir() call, as long as it's non-negative
  * for success..
  */
-int proc_readdir_de(struct proc_dir_entry *de, struct file *file,
-		    struct dir_context *ctx)
+int proc_readdir_de(struct file *file, struct dir_context *ctx,
+		    struct proc_dir_entry *de)
 {
 	int i;
 
@@ -292,7 +292,7 @@ int proc_readdir(struct file *file, struct dir_context *ctx)
 {
 	struct inode *inode = file_inode(file);
 
-	return proc_readdir_de(PDE(inode), file, ctx);
+	return proc_readdir_de(file, ctx, PDE(inode));
 }
 
 /*

fs/proc/inode.c

@@ -5,6 +5,7 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
+#include <linux/cache.h>
 #include <linux/time.h>
 #include <linux/proc_fs.h>
 #include <linux/kernel.h>
@@ -52,7 +53,7 @@ static void proc_evict_inode(struct inode *inode)
 	}
 }
 
-static struct kmem_cache * proc_inode_cachep;
+static struct kmem_cache *proc_inode_cachep __ro_after_init;
 
 static struct inode *proc_alloc_inode(struct super_block *sb)
 {
@@ -128,12 +129,12 @@ enum {BIAS = -1U<<31};
 
 static inline int use_pde(struct proc_dir_entry *pde)
 {
-	return atomic_inc_unless_negative(&pde->in_use);
+	return likely(atomic_inc_unless_negative(&pde->in_use));
 }
 
 static void unuse_pde(struct proc_dir_entry *pde)
 {
-	if (atomic_dec_return(&pde->in_use) == BIAS)
+	if (unlikely(atomic_dec_return(&pde->in_use) == BIAS))
 		complete(pde->pde_unload_completion);
 }
 
@@ -166,7 +167,7 @@ static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo)
 		spin_lock(&pde->pde_unload_lock);
 		/* After ->release. */
 		list_del(&pdeo->lh);
-		if (pdeo->c)
+		if (unlikely(pdeo->c))
 			complete(pdeo->c);
 		kfree(pdeo);
 	}
@@ -420,7 +421,7 @@ static const char *proc_get_link(struct dentry *dentry,
 				 struct delayed_call *done)
 {
 	struct proc_dir_entry *pde = PDE(inode);
-	if (unlikely(!use_pde(pde)))
+	if (!use_pde(pde))
 		return ERR_PTR(-EINVAL);
 	set_delayed_call(done, proc_put_link, pde);
 	return pde->data;

fs/proc/internal.h

@@ -31,24 +31,28 @@ struct mempolicy;
  * subdir_node is used to build the rb tree "subdir" of the parent.
  */
 struct proc_dir_entry {
+	/*
+	 * number of callers into module in progress;
+	 * negative -> it's going away RSN
+	 */
+	atomic_t in_use;
+	atomic_t count;		/* use count */
+	struct list_head pde_openers;	/* who did ->open, but not ->release */
+	/* protects ->pde_openers and all struct pde_opener instances */
+	spinlock_t pde_unload_lock;
+	struct completion *pde_unload_completion;
+	const struct inode_operations *proc_iops;
+	const struct file_operations *proc_fops;
+	void *data;
 	unsigned int low_ino;
-	umode_t mode;
 	nlink_t nlink;
 	kuid_t uid;
 	kgid_t gid;
 	loff_t size;
-	const struct inode_operations *proc_iops;
-	const struct file_operations *proc_fops;
 	struct proc_dir_entry *parent;
 	struct rb_root_cached subdir;
 	struct rb_node subdir_node;
-	void *data;
-	atomic_t count;		/* use count */
-	atomic_t in_use;	/* number of callers into module in progress; */
-			/* negative -> it's going away RSN */
-	struct completion *pde_unload_completion;
-	struct list_head pde_openers;	/* who did ->open, but not ->release */
-	spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
+	umode_t mode;
 	u8 namelen;
 	char name[];
 } __randomize_layout;
@@ -149,10 +153,9 @@ extern bool proc_fill_cache(struct file *, struct dir_context *, const char *, i
  * generic.c
  */
 extern struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
-extern struct dentry *proc_lookup_de(struct proc_dir_entry *, struct inode *,
-				     struct dentry *);
+struct dentry *proc_lookup_de(struct inode *, struct dentry *, struct proc_dir_entry *);
 extern int proc_readdir(struct file *, struct dir_context *);
-extern int proc_readdir_de(struct proc_dir_entry *, struct file *, struct dir_context *);
+int proc_readdir_de(struct file *, struct dir_context *, struct proc_dir_entry *);
 
 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
 {

fs/proc/kcore.c

@@ -512,23 +512,15 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
 				return -EFAULT;
 		} else {
 			if (kern_addr_valid(start)) {
-				unsigned long n;
-
 				/*
 				 * Using bounce buffer to bypass the
 				 * hardened user copy kernel text checks.
 				 */
-				memcpy(buf, (char *) start, tsz);
-				n = copy_to_user(buffer, buf, tsz);
-				/*
-				 * We cannot distinguish between fault on source
-				 * and fault on destination. When this happens
-				 * we clear too and hope it will trigger the
-				 * EFAULT again.
-				 */
-				if (n) { 
-					if (clear_user(buffer + tsz - n,
-								n))
+				if (probe_kernel_read(buf, (void *) start, tsz)) {
+					if (clear_user(buffer, tsz))
+						return -EFAULT;
+				} else {
+					if (copy_to_user(buffer, buf, tsz))
 						return -EFAULT;
 				}
 			} else {

fs/proc/proc_net.c

@@ -135,7 +135,7 @@ static struct dentry *proc_tgid_net_lookup(struct inode *dir,
 	de = ERR_PTR(-ENOENT);
 	net = get_proc_task_net(dir);
 	if (net != NULL) {
-		de = proc_lookup_de(net->proc_net, dir, dentry);
+		de = proc_lookup_de(dir, dentry, net->proc_net);
 		put_net(net);
 	}
 	return de;
@@ -172,7 +172,7 @@ static int proc_tgid_net_readdir(struct file *file, struct dir_context *ctx)
 	ret = -EINVAL;
 	net = get_proc_task_net(file_inode(file));
 	if (net != NULL) {
-		ret = proc_readdir_de(net->proc_net, file, ctx);
+		ret = proc_readdir_de(file, ctx, net->proc_net);
 		put_net(net);
 	}
 	return ret;

fs/proc/self.c

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/cache.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/pid_namespace.h>
@@ -17,11 +18,11 @@ static const char *proc_self_get_link(struct dentry *dentry,
 
 	if (!tgid)
 		return ERR_PTR(-ENOENT);
-	/* 11 for max length of signed int in decimal + NULL term */
-	name = kmalloc(12, dentry ? GFP_KERNEL : GFP_ATOMIC);
+	/* max length of unsigned int in decimal + NULL term */
+	name = kmalloc(10 + 1, dentry ? GFP_KERNEL : GFP_ATOMIC);
 	if (unlikely(!name))
 		return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD);
-	sprintf(name, "%d", tgid);
+	sprintf(name, "%u", tgid);
 	set_delayed_call(done, kfree_link, name);
 	return name;
 }
@@ -30,7 +31,7 @@ static const struct inode_operations proc_self_inode_operations = {
 	.get_link	= proc_self_get_link,
 };
 
-static unsigned self_inum;
+static unsigned self_inum __ro_after_init;
 
 int proc_setup_self(struct super_block *s)
 {

fs/proc/thread_self.c

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/cache.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/pid_namespace.h>
@@ -18,11 +19,10 @@ static const char *proc_thread_self_get_link(struct dentry *dentry,
 
 	if (!pid)
 		return ERR_PTR(-ENOENT);
-	name = kmalloc(PROC_NUMBUF + 6 + PROC_NUMBUF,
-				dentry ? GFP_KERNEL : GFP_ATOMIC);
+	name = kmalloc(10 + 6 + 10 + 1, dentry ? GFP_KERNEL : GFP_ATOMIC);
 	if (unlikely(!name))
 		return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD);
-	sprintf(name, "%d/task/%d", tgid, pid);
+	sprintf(name, "%u/task/%u", tgid, pid);
 	set_delayed_call(done, kfree_link, name);
 	return name;
 }
@@ -31,7 +31,7 @@ static const struct inode_operations proc_thread_self_inode_operations = {
 	.get_link	= proc_thread_self_get_link,
 };
 
-static unsigned thread_self_inum;
+static unsigned thread_self_inum __ro_after_init;
 
 int proc_setup_thread_self(struct super_block *s)
 {

fs/proc/vmcore.c

@@ -1178,18 +1178,16 @@ fs_initcall(vmcore_init);
 /* Cleanup function for vmcore module. */
 void vmcore_cleanup(void)
 {
-	struct list_head *pos, *next;
-
 	if (proc_vmcore) {
 		proc_remove(proc_vmcore);
 		proc_vmcore = NULL;
 	}
 
 	/* clear the vmcore list. */
-	list_for_each_safe(pos, next, &vmcore_list) {
+	while (!list_empty(&vmcore_list)) {
 		struct vmcore *m;
 
-		m = list_entry(pos, struct vmcore, list);
+		m = list_first_entry(&vmcore_list, struct vmcore, list);
 		list_del(&m->list);
 		kfree(m);
 	}

include/asm-generic/bitops/find.h

@@ -16,6 +16,22 @@ extern unsigned long find_next_bit(const unsigned long *addr, unsigned long
 		size, unsigned long offset);
 #endif
 
+#ifndef find_next_and_bit
+/**
+ * find_next_and_bit - find the next set bit in both memory regions
+ * @addr1: The first address to base the search on
+ * @addr2: The second address to base the search on
+ * @offset: The bitnumber to start searching at
+ * @size: The bitmap size in bits
+ *
+ * Returns the bit number for the next set bit
+ * If no bits are set, returns @size.
+ */
+extern unsigned long find_next_and_bit(const unsigned long *addr1,
+		const unsigned long *addr2, unsigned long size,
+		unsigned long offset);
+#endif
+
 #ifndef find_next_zero_bit
 /**
  * find_next_zero_bit - find the next cleared bit in a memory region
@@ -55,8 +71,12 @@ extern unsigned long find_first_zero_bit(const unsigned long *addr,
 					 unsigned long size);
 #else /* CONFIG_GENERIC_FIND_FIRST_BIT */
 
+#ifndef find_first_bit
 #define find_first_bit(addr, size) find_next_bit((addr), (size), 0)
+#endif
+#ifndef find_first_zero_bit
 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
+#endif
 
 #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
 

include/linux/bitmap.h

@@ -64,9 +64,14 @@
  *  bitmap_find_free_region(bitmap, bits, order)  Find and allocate bit region
  *  bitmap_release_region(bitmap, pos, order)   Free specified bit region
  *  bitmap_allocate_region(bitmap, pos, order)  Allocate specified bit region
- *  bitmap_from_u32array(dst, nbits, buf, nwords)  *dst = *buf (nwords 32b words)
- *  bitmap_to_u32array(buf, nwords, src, nbits) *buf = *dst (nwords 32b words)
+ *  bitmap_from_arr32(dst, buf, nbits)          Copy nbits from u32[] buf to dst
+ *  bitmap_to_arr32(buf, src, nbits)            Copy nbits from buf to u32[] dst
  *
+ * Note, bitmap_zero() and bitmap_fill() operate over the region of
+ * unsigned longs, that is, bits behind bitmap till the unsigned long
+ * boundary will be zeroed or filled as well. Consider to use
+ * bitmap_clear() or bitmap_set() to make explicit zeroing or filling
+ * respectively.
  */
 
 /**
@@ -83,8 +88,12 @@
  *  test_and_change_bit(bit, addr)      Change bit and return old value
  *  find_first_zero_bit(addr, nbits)    Position first zero bit in *addr
  *  find_first_bit(addr, nbits)         Position first set bit in *addr
- *  find_next_zero_bit(addr, nbits, bit)  Position next zero bit in *addr >= bit
+ *  find_next_zero_bit(addr, nbits, bit)
+ *                                      Position next zero bit in *addr >= bit
  *  find_next_bit(addr, nbits, bit)     Position next set bit in *addr >= bit
+ *  find_next_and_bit(addr1, addr2, nbits, bit)
+ *                                      Same as find_next_bit, but in
+ *                                      (*addr1 & *addr2)
  *
  */
 
@@ -174,14 +183,7 @@ extern void bitmap_fold(unsigned long *dst, const unsigned long *orig,
 extern int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order);
 extern void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order);
 extern int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order);
-extern unsigned int bitmap_from_u32array(unsigned long *bitmap,
-					 unsigned int nbits,
-					 const u32 *buf,
-					 unsigned int nwords);
-extern unsigned int bitmap_to_u32array(u32 *buf,
-				       unsigned int nwords,
-				       const unsigned long *bitmap,
-				       unsigned int nbits);
+
 #ifdef __BIG_ENDIAN
 extern void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits);
 #else
@@ -209,12 +211,12 @@ static inline void bitmap_zero(unsigned long *dst, unsigned int nbits)
 
 static inline void bitmap_fill(unsigned long *dst, unsigned int nbits)
 {
-	unsigned int nlongs = BITS_TO_LONGS(nbits);
-	if (!small_const_nbits(nbits)) {
-		unsigned int len = (nlongs - 1) * sizeof(unsigned long);
-		memset(dst, 0xff,  len);
+	if (small_const_nbits(nbits))
+		*dst = ~0UL;
+	else {
+		unsigned int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
+		memset(dst, 0xff, len);
 	}
-	dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits);
 }
 
 static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
@@ -228,6 +230,35 @@ static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
 	}
 }
 
+/*
+ * Copy bitmap and clear tail bits in last word.
+ */
+static inline void bitmap_copy_clear_tail(unsigned long *dst,
+		const unsigned long *src, unsigned int nbits)
+{
+	bitmap_copy(dst, src, nbits);
+	if (nbits % BITS_PER_LONG)
+		dst[nbits / BITS_PER_LONG] &= BITMAP_LAST_WORD_MASK(nbits);
+}
+
+/*
+ * On 32-bit systems bitmaps are represented as u32 arrays internally, and
+ * therefore conversion is not needed when copying data from/to arrays of u32.
+ */
+#if BITS_PER_LONG == 64
+extern void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf,
+							unsigned int nbits);
+extern void bitmap_to_arr32(u32 *buf, const unsigned long *bitmap,
+							unsigned int nbits);
+#else
+#define bitmap_from_arr32(bitmap, buf, nbits)			\
+	bitmap_copy_clear_tail((unsigned long *) (bitmap),	\
+			(const unsigned long *) (buf), (nbits))
+#define bitmap_to_arr32(buf, bitmap, nbits)			\
+	bitmap_copy_clear_tail((unsigned long *) (buf),		\
+			(const unsigned long *) (bitmap), (nbits))
+#endif
+
 static inline int bitmap_and(unsigned long *dst, const unsigned long *src1,
 			const unsigned long *src2, unsigned int nbits)
 {

include/linux/build_bug.h

@@ -8,7 +8,6 @@
 #define __BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
 #define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
 #define BUILD_BUG_ON_ZERO(e) (0)
-#define BUILD_BUG_ON_NULL(e) ((void *)0)
 #define BUILD_BUG_ON_INVALID(e) (0)
 #define BUILD_BUG_ON_MSG(cond, msg) (0)
 #define BUILD_BUG_ON(condition) (0)
@@ -28,7 +27,6 @@
  * aren't permitted).
  */
 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))
-#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:(-!!(e)); }))
 
 /*
  * BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the

include/linux/compiler-clang.h

@@ -19,3 +19,11 @@
 
 #define randomized_struct_fields_start	struct {
 #define randomized_struct_fields_end	};
+
+/* all clang versions usable with the kernel support KASAN ABI version 5 */
+#define KASAN_ABI_VERSION 5
+
+/* emulate gcc's __SANITIZE_ADDRESS__ flag */
+#if __has_feature(address_sanitizer)
+#define __SANITIZE_ADDRESS__
+#endif

include/linux/cpumask.h

@@ -640,7 +640,7 @@ static inline int cpulist_parse(const char *buf, struct cpumask *dstp)
 /**
  * cpumask_size - size to allocate for a 'struct cpumask' in bytes
  */
-static inline size_t cpumask_size(void)
+static inline unsigned int cpumask_size(void)
 {
 	return BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long);
 }

include/linux/cpuset.h

@@ -112,7 +112,7 @@ static inline int cpuset_do_slab_mem_spread(void)
 	return task_spread_slab(current);
 }
 
-extern int current_cpuset_is_being_rebound(void);
+extern bool current_cpuset_is_being_rebound(void);
 
 extern void rebuild_sched_domains(void);
 
@@ -247,9 +247,9 @@ static inline int cpuset_do_slab_mem_spread(void)
 	return 0;
 }
 
-static inline int current_cpuset_is_being_rebound(void)
+static inline bool current_cpuset_is_being_rebound(void)
 {
-	return 0;
+	return false;
 }
 
 static inline void rebuild_sched_domains(void)

include/linux/crash_dump.h

@@ -2,13 +2,13 @@
 #ifndef LINUX_CRASH_DUMP_H
 #define LINUX_CRASH_DUMP_H
 
-#ifdef CONFIG_CRASH_DUMP
 #include <linux/kexec.h>
 #include <linux/proc_fs.h>
 #include <linux/elf.h>
 
 #include <asm/pgtable.h> /* for pgprot_t */
 
+#ifdef CONFIG_CRASH_DUMP
 #define ELFCORE_ADDR_MAX	(-1ULL)
 #define ELFCORE_ADDR_ERR	(-2ULL)
 
@@ -52,13 +52,13 @@ void vmcore_cleanup(void);
  * has passed the elf core header address on command line.
  *
  * This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will
- * return 1 if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic of
- * previous kernel.
+ * return true if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic
+ * of previous kernel.
  */
 
-static inline int is_kdump_kernel(void)
+static inline bool is_kdump_kernel(void)
 {
-	return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0;
+	return elfcorehdr_addr != ELFCORE_ADDR_MAX;
 }
 
 /* is_vmcore_usable() checks if the kernel is booting after a panic and
@@ -89,7 +89,7 @@ extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
 extern void unregister_oldmem_pfn_is_ram(void);
 
 #else /* !CONFIG_CRASH_DUMP */
-static inline int is_kdump_kernel(void) { return 0; }
+static inline bool is_kdump_kernel(void) { return 0; }
 #endif /* CONFIG_CRASH_DUMP */
 
 extern unsigned long saved_max_pfn;

include/linux/genl_magic_func.h

@@ -2,6 +2,7 @@
 #ifndef GENL_MAGIC_FUNC_H
 #define GENL_MAGIC_FUNC_H
 
+#include <linux/build_bug.h>
 #include <linux/genl_magic_struct.h>
 
 /*
@@ -132,17 +133,6 @@ static void dprint_array(const char *dir, int nla_type,
  * use one static buffer for parsing of nested attributes */
 static struct nlattr *nested_attr_tb[128];
 
-#ifndef BUILD_BUG_ON
-/* Force a compilation error if condition is true */
-#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
-/* Force a compilation error if condition is true, but also produce a
-   result (of value 0 and type size_t), so the expression can be used
-   e.g. in a structure initializer (or where-ever else comma expressions
-   aren't permitted). */
-#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
-#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
-#endif
-
 #undef GENL_struct
 #define GENL_struct(tag_name, tag_number, s_name, s_fields)		\
 /* *_from_attrs functions are static, but potentially unused */		\

include/linux/ioport.h

@@ -265,7 +265,7 @@ extern struct resource * __devm_request_region(struct device *dev,
 extern void __devm_release_region(struct device *dev, struct resource *parent,
 				  resource_size_t start, resource_size_t n);
 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
-extern int iomem_is_exclusive(u64 addr);
+extern bool iomem_is_exclusive(u64 addr);
 
 extern int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,

include/linux/kallsyms.h

@@ -167,7 +167,7 @@ static inline int kallsyms_show_value(void)
 
 static inline void print_ip_sym(unsigned long ip)
 {
-	printk("[<%p>] %pS\n", (void *) ip, (void *) ip);
+	printk("[<%px>] %pS\n", (void *) ip, (void *) ip);
 }
 
 #endif /*_LINUX_KALLSYMS_H*/

include/linux/kasan.h

@@ -11,8 +11,6 @@ struct task_struct;
 
 #ifdef CONFIG_KASAN
 
-#define KASAN_SHADOW_SCALE_SHIFT 3
-
 #include <asm/kasan.h>
 #include <asm/pgtable.h>
 
@@ -56,14 +54,14 @@ void kasan_poison_object_data(struct kmem_cache *cache, void *object);
 void kasan_init_slab_obj(struct kmem_cache *cache, const void *object);
 
 void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags);
-void kasan_kfree_large(const void *ptr);
-void kasan_poison_kfree(void *ptr);
+void kasan_kfree_large(void *ptr, unsigned long ip);
+void kasan_poison_kfree(void *ptr, unsigned long ip);
 void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size,
 		  gfp_t flags);
 void kasan_krealloc(const void *object, size_t new_size, gfp_t flags);
 
 void kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags);
-bool kasan_slab_free(struct kmem_cache *s, void *object);
+bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip);
 
 struct kasan_cache {
 	int alloc_meta_offset;
@@ -108,8 +106,8 @@ static inline void kasan_init_slab_obj(struct kmem_cache *cache,
 				const void *object) {}
 
 static inline void kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) {}
-static inline void kasan_kfree_large(const void *ptr) {}
-static inline void kasan_poison_kfree(void *ptr) {}
+static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
+static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
 static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
 				size_t size, gfp_t flags) {}
 static inline void kasan_krealloc(const void *object, size_t new_size,
@@ -117,7 +115,8 @@ static inline void kasan_krealloc(const void *object, size_t new_size,
 
 static inline void kasan_slab_alloc(struct kmem_cache *s, void *object,
 				   gfp_t flags) {}
-static inline bool kasan_slab_free(struct kmem_cache *s, void *object)
+static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
+				   unsigned long ip)
 {
 	return false;
 }

include/linux/lockref.h

@@ -44,7 +44,7 @@ extern void lockref_mark_dead(struct lockref *);
 extern int lockref_get_not_dead(struct lockref *);
 
 /* Must be called under spinlock for reliable results */
-static inline int __lockref_is_dead(const struct lockref *l)
+static inline bool __lockref_is_dead(const struct lockref *l)
 {
 	return ((int)l->count < 0);
 }

include/linux/memblock.h

@@ -332,8 +332,8 @@ void memblock_enforce_memory_limit(phys_addr_t memory_limit);
 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
 void memblock_mem_limit_remove_map(phys_addr_t limit);
 bool memblock_is_memory(phys_addr_t addr);
-int memblock_is_map_memory(phys_addr_t addr);
-int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
+bool memblock_is_map_memory(phys_addr_t addr);
+bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
 bool memblock_is_reserved(phys_addr_t addr);
 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
 

include/linux/module.h

@@ -491,7 +491,7 @@ extern struct mutex module_mutex;
 /* FIXME: It'd be nice to isolate modules during init, too, so they
    aren't used before they (may) fail.  But presently too much code
    (IDE & SCSI) require entry into the module during init.*/
-static inline int module_is_live(struct module *mod)
+static inline bool module_is_live(struct module *mod)
 {
 	return mod->state != MODULE_STATE_GOING;
 }

include/linux/mutex.h

@@ -138,9 +138,9 @@ extern void __mutex_init(struct mutex *lock, const char *name,
  * mutex_is_locked - is the mutex locked
  * @lock: the mutex to be queried
  *
- * Returns 1 if the mutex is locked, 0 if unlocked.
+ * Returns true if the mutex is locked, false if unlocked.
  */
-static inline int mutex_is_locked(struct mutex *lock)
+static inline bool mutex_is_locked(struct mutex *lock)
 {
 	/*
 	 * XXX think about spin_is_locked

include/linux/pipe_fs_i.h

@@ -167,10 +167,9 @@ void pipe_lock(struct pipe_inode_info *);
 void pipe_unlock(struct pipe_inode_info *);
 void pipe_double_lock(struct pipe_inode_info *, struct pipe_inode_info *);
 
-extern unsigned int pipe_max_size, pipe_min_size;
+extern unsigned int pipe_max_size;
 extern unsigned long pipe_user_pages_hard;
 extern unsigned long pipe_user_pages_soft;
-int pipe_proc_fn(struct ctl_table *, int, void __user *, size_t *, loff_t *);
 
 /* Drop the inode semaphore and wait for a pipe event, atomically */
 void pipe_wait(struct pipe_inode_info *pipe);
@@ -191,6 +190,6 @@ long pipe_fcntl(struct file *, unsigned int, unsigned long arg);
 struct pipe_inode_info *get_pipe_info(struct file *file);
 
 int create_pipe_files(struct file **, int);
-unsigned int round_pipe_size(unsigned int size);
+unsigned int round_pipe_size(unsigned long size);
 
 #endif

include/linux/sched.h

@@ -1497,6 +1497,11 @@ static inline struct thread_info *task_thread_info(struct task_struct *task)
 extern struct task_struct *find_task_by_vpid(pid_t nr);
 extern struct task_struct *find_task_by_pid_ns(pid_t nr, struct pid_namespace *ns);
 
+/*
+ * find a task by its virtual pid and get the task struct
+ */
+extern struct task_struct *find_get_task_by_vpid(pid_t nr);
+
 extern int wake_up_state(struct task_struct *tsk, unsigned int state);
 extern int wake_up_process(struct task_struct *tsk);
 extern void wake_up_new_task(struct task_struct *tsk);

include/linux/sysctl.h

@@ -51,9 +51,6 @@ extern int proc_dointvec_minmax(struct ctl_table *, int,
 extern int proc_douintvec_minmax(struct ctl_table *table, int write,
 				 void __user *buffer, size_t *lenp,
 				 loff_t *ppos);
-extern int proc_dopipe_max_size(struct ctl_table *table, int write,
-				void __user *buffer, size_t *lenp,
-				loff_t *ppos);
 extern int proc_dointvec_jiffies(struct ctl_table *, int,
 				 void __user *, size_t *, loff_t *);
 extern int proc_dointvec_userhz_jiffies(struct ctl_table *, int,

include/linux/uuid.h

@@ -17,6 +17,7 @@
 #define _LINUX_UUID_H_
 
 #include <uapi/linux/uuid.h>
+#include <linux/string.h>
 
 #define UUID_SIZE 16
 

include/uapi/asm-generic/siginfo.h

@@ -280,8 +280,8 @@ typedef struct siginfo {
 #define NSIGTRAP	4
 
 /*
- * There are an additional set of SIGTRAP si_codes used by ptrace
- * that of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
+ * There is an additional set of SIGTRAP si_codes used by ptrace
+ * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
  */
 
 /*

include/uapi/linux/uuid.h

@@ -19,7 +19,6 @@
 #define _UAPI_LINUX_UUID_H_
 
 #include <linux/types.h>
-#include <linux/string.h>
 
 typedef struct {
 	__u8 b[16];

ipc/mqueue.c

@@ -596,7 +596,7 @@ static void wq_add(struct mqueue_inode_info *info, int sr,
 	ewp->task = current;
 
 	list_for_each_entry(walk, &info->e_wait_q[sr].list, list) {
-		if (walk->task->static_prio <= current->static_prio) {
+		if (walk->task->prio <= current->prio) {
 			list_add_tail(&ewp->list, &walk->list);
 			return;
 		}

ipc/msg.c

@@ -476,9 +476,9 @@ static int msgctl_info(struct ipc_namespace *ns, int msqid,
 static int msgctl_stat(struct ipc_namespace *ns, int msqid,
 			 int cmd, struct msqid64_ds *p)
 {
-	int err;
 	struct msg_queue *msq;
-	int success_return;
+	int id = 0;
+	int err;
 
 	memset(p, 0, sizeof(*p));
 
@@ -489,14 +489,13 @@ static int msgctl_stat(struct ipc_namespace *ns, int msqid,
 			err = PTR_ERR(msq);
 			goto out_unlock;
 		}
-		success_return = msq->q_perm.id;
+		id = msq->q_perm.id;
 	} else {
 		msq = msq_obtain_object_check(ns, msqid);
 		if (IS_ERR(msq)) {
 			err = PTR_ERR(msq);
 			goto out_unlock;
 		}
-		success_return = 0;
 	}
 
 	err = -EACCES;
@@ -507,6 +506,14 @@ static int msgctl_stat(struct ipc_namespace *ns, int msqid,
 	if (err)
 		goto out_unlock;
 
+	ipc_lock_object(&msq->q_perm);
+
+	if (!ipc_valid_object(&msq->q_perm)) {
+		ipc_unlock_object(&msq->q_perm);
+		err = -EIDRM;
+		goto out_unlock;
+	}
+
 	kernel_to_ipc64_perm(&msq->q_perm, &p->msg_perm);
 	p->msg_stime  = msq->q_stime;
 	p->msg_rtime  = msq->q_rtime;
@@ -516,9 +523,10 @@ static int msgctl_stat(struct ipc_namespace *ns, int msqid,
 	p->msg_qbytes = msq->q_qbytes;
 	p->msg_lspid  = msq->q_lspid;
 	p->msg_lrpid  = msq->q_lrpid;
-	rcu_read_unlock();
 
-	return success_return;
+	ipc_unlock_object(&msq->q_perm);
+	rcu_read_unlock();
+	return id;
 
 out_unlock:
 	rcu_read_unlock();

ipc/sem.c

@@ -1213,10 +1213,20 @@ static int semctl_stat(struct ipc_namespace *ns, int semid,
 	if (err)
 		goto out_unlock;
 
+	ipc_lock_object(&sma->sem_perm);
+
+	if (!ipc_valid_object(&sma->sem_perm)) {
+		ipc_unlock_object(&sma->sem_perm);
+		err = -EIDRM;
+		goto out_unlock;
+	}
+
 	kernel_to_ipc64_perm(&sma->sem_perm, &semid64->sem_perm);
 	semid64->sem_otime = get_semotime(sma);
 	semid64->sem_ctime = sma->sem_ctime;
 	semid64->sem_nsems = sma->sem_nsems;
+
+	ipc_unlock_object(&sma->sem_perm);
 	rcu_read_unlock();
 	return id;
 

ipc/shm.c

@@ -909,9 +909,11 @@ static int shmctl_stat(struct ipc_namespace *ns, int shmid,
 			int cmd, struct shmid64_ds *tbuf)
 {
 	struct shmid_kernel *shp;
-	int result;
+	int id = 0;
 	int err;
 
+	memset(tbuf, 0, sizeof(*tbuf));
+
 	rcu_read_lock();
 	if (cmd == SHM_STAT) {
 		shp = shm_obtain_object(ns, shmid);
@@ -919,14 +921,13 @@ static int shmctl_stat(struct ipc_namespace *ns, int shmid,
 			err = PTR_ERR(shp);
 			goto out_unlock;
 		}
-		result = shp->shm_perm.id;
+		id = shp->shm_perm.id;
 	} else {
 		shp = shm_obtain_object_check(ns, shmid);
 		if (IS_ERR(shp)) {
 			err = PTR_ERR(shp);
 			goto out_unlock;
 		}
-		result = 0;
 	}
 
 	err = -EACCES;
@@ -937,7 +938,14 @@ static int shmctl_stat(struct ipc_namespace *ns, int shmid,
 	if (err)
 		goto out_unlock;
 
-	memset(tbuf, 0, sizeof(*tbuf));
+	ipc_lock_object(&shp->shm_perm);
+
+	if (!ipc_valid_object(&shp->shm_perm)) {
+		ipc_unlock_object(&shp->shm_perm);
+		err = -EIDRM;
+		goto out_unlock;
+	}
+
 	kernel_to_ipc64_perm(&shp->shm_perm, &tbuf->shm_perm);
 	tbuf->shm_segsz	= shp->shm_segsz;
 	tbuf->shm_atime	= shp->shm_atim;
@@ -946,8 +954,10 @@ static int shmctl_stat(struct ipc_namespace *ns, int shmid,
 	tbuf->shm_cpid	= shp->shm_cprid;
 	tbuf->shm_lpid	= shp->shm_lprid;
 	tbuf->shm_nattch = shp->shm_nattch;
+
+	ipc_unlock_object(&shp->shm_perm);
 	rcu_read_unlock();
-	return result;
+	return id;
 
 out_unlock:
 	rcu_read_unlock();

ipc/util.c

@@ -23,9 +23,12 @@
  *	    tree.
  *	    - perform initial checks (capabilities, auditing and permission,
  *	      etc).
- *	    - perform read-only operations, such as STAT, INFO commands.
+ *	    - perform read-only operations, such as INFO command, that
+ *	      do not demand atomicity
  *	      acquire the ipc lock (kern_ipc_perm.lock) through
  *	      ipc_lock_object()
+ *		- perform read-only operations that demand atomicity,
+ *		  such as STAT command.
  *		- perform data updates, such as SET, RMID commands and
  *		  mechanism-specific operations (semop/semtimedop,
  *		  msgsnd/msgrcv, shmat/shmdt).

kernel/async.c

@@ -84,20 +84,24 @@ static atomic_t entry_count;
 
 static async_cookie_t lowest_in_progress(struct async_domain *domain)
 {
-	struct list_head *pending;
+	struct async_entry *first = NULL;
 	async_cookie_t ret = ASYNC_COOKIE_MAX;
 	unsigned long flags;
 
 	spin_lock_irqsave(&async_lock, flags);
 
-	if (domain)
-		pending = &domain->pending;
-	else
-		pending = &async_global_pending;
+	if (domain) {
+		if (!list_empty(&domain->pending))
+			first = list_first_entry(&domain->pending,
+					struct async_entry, domain_list);
+	} else {
+		if (!list_empty(&async_global_pending))
+			first = list_first_entry(&async_global_pending,
+					struct async_entry, global_list);
+	}
 
-	if (!list_empty(pending))
-		ret = list_first_entry(pending, struct async_entry,
-				       domain_list)->cookie;
+	if (first)
+		ret = first->cookie;
 
 	spin_unlock_irqrestore(&async_lock, flags);
 	return ret;

kernel/cgroup/cpuset.c

@@ -1254,9 +1254,9 @@ done:
 	return retval;
 }
 
-int current_cpuset_is_being_rebound(void)
+bool current_cpuset_is_being_rebound(void)
 {
-	int ret;
+	bool ret;
 
 	rcu_read_lock();
 	ret = task_cs(current) == cpuset_being_rebound;

kernel/compat.c

@@ -355,7 +355,7 @@ COMPAT_SYSCALL_DEFINE3(sched_getaffinity, compat_pid_t,  pid, unsigned int, len,
 
 	ret = sched_getaffinity(pid, mask);
 	if (ret == 0) {
-		size_t retlen = min_t(size_t, len, cpumask_size());
+		unsigned int retlen = min(len, cpumask_size());
 
 		if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8))
 			ret = -EFAULT;

kernel/configs/tiny.config

@@ -10,3 +10,7 @@ CONFIG_OPTIMIZE_INLINING=y
 # CONFIG_SLAB is not set
 # CONFIG_SLUB is not set
 CONFIG_SLOB=y
+CONFIG_CC_STACKPROTECTOR_NONE=y
+# CONFIG_CC_STACKPROTECTOR_REGULAR is not set
+# CONFIG_CC_STACKPROTECTOR_STRONG is not set
+# CONFIG_CC_STACKPROTECTOR_AUTO is not set

kernel/fork.c

@@ -1592,6 +1592,10 @@ static __latent_entropy struct task_struct *copy_process(
 	int retval;
 	struct task_struct *p;
 
+	/*
+	 * Don't allow sharing the root directory with processes in a different
+	 * namespace
+	 */
 	if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
 		return ERR_PTR(-EINVAL);
 
@@ -2067,6 +2071,8 @@ long _do_fork(unsigned long clone_flags,
 	      int __user *child_tidptr,
 	      unsigned long tls)
 {
+	struct completion vfork;
+	struct pid *pid;
 	struct task_struct *p;
 	int trace = 0;
 	long nr;
@@ -2092,43 +2098,40 @@ long _do_fork(unsigned long clone_flags,
 	p = copy_process(clone_flags, stack_start, stack_size,
 			 child_tidptr, NULL, trace, tls, NUMA_NO_NODE);
 	add_latent_entropy();
+
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+
 	/*
 	 * Do this prior waking up the new thread - the thread pointer
 	 * might get invalid after that point, if the thread exits quickly.
 	 */
-	if (!IS_ERR(p)) {
-		struct completion vfork;
-		struct pid *pid;
-
-		trace_sched_process_fork(current, p);
+	trace_sched_process_fork(current, p);
 
-		pid = get_task_pid(p, PIDTYPE_PID);
-		nr = pid_vnr(pid);
+	pid = get_task_pid(p, PIDTYPE_PID);
+	nr = pid_vnr(pid);
 
-		if (clone_flags & CLONE_PARENT_SETTID)
-			put_user(nr, parent_tidptr);
+	if (clone_flags & CLONE_PARENT_SETTID)
+		put_user(nr, parent_tidptr);
 
-		if (clone_flags & CLONE_VFORK) {
-			p->vfork_done = &vfork;
-			init_completion(&vfork);
-			get_task_struct(p);
-		}
-
-		wake_up_new_task(p);
+	if (clone_flags & CLONE_VFORK) {
+		p->vfork_done = &vfork;
+		init_completion(&vfork);
+		get_task_struct(p);
+	}
 
-		/* forking complete and child started to run, tell ptracer */
-		if (unlikely(trace))
-			ptrace_event_pid(trace, pid);
+	wake_up_new_task(p);
 
-		if (clone_flags & CLONE_VFORK) {
-			if (!wait_for_vfork_done(p, &vfork))
-				ptrace_event_pid(PTRACE_EVENT_VFORK_DONE, pid);
-		}
+	/* forking complete and child started to run, tell ptracer */
+	if (unlikely(trace))
+		ptrace_event_pid(trace, pid);
 
-		put_pid(pid);
-	} else {
-		nr = PTR_ERR(p);
+	if (clone_flags & CLONE_VFORK) {
+		if (!wait_for_vfork_done(p, &vfork))
+			ptrace_event_pid(PTRACE_EVENT_VFORK_DONE, pid);
 	}
+
+	put_pid(pid);
 	return nr;
 }
 

kernel/futex.c

@@ -862,24 +862,6 @@ static void put_pi_state(struct futex_pi_state *pi_state)
 	}
 }
 
-/*
- * Look up the task based on what TID userspace gave us.
- * We dont trust it.
- */
-static struct task_struct *futex_find_get_task(pid_t pid)
-{
-	struct task_struct *p;
-
-	rcu_read_lock();
-	p = find_task_by_vpid(pid);
-	if (p)
-		get_task_struct(p);
-
-	rcu_read_unlock();
-
-	return p;
-}
-
 #ifdef CONFIG_FUTEX_PI
 
 /*
@@ -1183,7 +1165,7 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key,
 	 */
 	if (!pid)
 		return -ESRCH;
-	p = futex_find_get_task(pid);
+	p = find_get_task_by_vpid(pid);
 	if (!p)
 		return -ESRCH;
 

kernel/irq/spurious.c

@@ -10,7 +10,6 @@
 #include <linux/jiffies.h>
 #include <linux/irq.h>
 #include <linux/module.h>
-#include <linux/kallsyms.h>
 #include <linux/interrupt.h>
 #include <linux/moduleparam.h>
 #include <linux/timer.h>

kernel/kcov.c

@@ -358,7 +358,8 @@ static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
 		 */
 		if (kcov->mode != KCOV_MODE_INIT || !kcov->area)
 			return -EINVAL;
-		if (kcov->t != NULL)
+		t = current;
+		if (kcov->t != NULL || t->kcov != NULL)
 			return -EBUSY;
 		if (arg == KCOV_TRACE_PC)
 			kcov->mode = KCOV_MODE_TRACE_PC;
@@ -370,7 +371,6 @@ static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
 #endif
 		else
 			return -EINVAL;
-		t = current;
 		/* Cache in task struct for performance. */
 		t->kcov_size = kcov->size;
 		t->kcov_area = kcov->area;

kernel/pid.c

@@ -343,6 +343,19 @@ struct task_struct *find_task_by_vpid(pid_t vnr)
 	return find_task_by_pid_ns(vnr, task_active_pid_ns(current));
 }
 
+struct task_struct *find_get_task_by_vpid(pid_t nr)
+{
+	struct task_struct *task;
+
+	rcu_read_lock();
+	task = find_task_by_vpid(nr);
+	if (task)
+		get_task_struct(task);
+	rcu_read_unlock();
+
+	return task;
+}
+
 struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
 {
 	struct pid *pid;

kernel/ptrace.c

@@ -1103,21 +1103,6 @@ int ptrace_request(struct task_struct *child, long request,
 	return ret;
 }
 
-static struct task_struct *ptrace_get_task_struct(pid_t pid)
-{
-	struct task_struct *child;
-
-	rcu_read_lock();
-	child = find_task_by_vpid(pid);
-	if (child)
-		get_task_struct(child);
-	rcu_read_unlock();
-
-	if (!child)
-		return ERR_PTR(-ESRCH);
-	return child;
-}
-
 #ifndef arch_ptrace_attach
 #define arch_ptrace_attach(child)	do { } while (0)
 #endif
@@ -1135,9 +1120,9 @@ SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr,
 		goto out;
 	}
 
-	child = ptrace_get_task_struct(pid);
-	if (IS_ERR(child)) {
-		ret = PTR_ERR(child);
+	child = find_get_task_by_vpid(pid);
+	if (!child) {
+		ret = -ESRCH;
 		goto out;
 	}
 
@@ -1281,9 +1266,9 @@ COMPAT_SYSCALL_DEFINE4(ptrace, compat_long_t, request, compat_long_t, pid,
 		goto out;
 	}
 
-	child = ptrace_get_task_struct(pid);
-	if (IS_ERR(child)) {
-		ret = PTR_ERR(child);
+	child = find_get_task_by_vpid(pid);
+	if (!child) {
+		ret = -ESRCH;
 		goto out;
 	}
 

kernel/relay.c

@@ -611,7 +611,6 @@ free_bufs:
 
 	kref_put(&chan->kref, relay_destroy_channel);
 	mutex_unlock(&relay_channels_mutex);
-	kfree(chan);
 	return NULL;
 }
 EXPORT_SYMBOL_GPL(relay_open);

kernel/resource.c

@@ -1576,17 +1576,17 @@ static int strict_iomem_checks;
 
 /*
  * check if an address is reserved in the iomem resource tree
- * returns 1 if reserved, 0 if not reserved.
+ * returns true if reserved, false if not reserved.
  */
-int iomem_is_exclusive(u64 addr)
+bool iomem_is_exclusive(u64 addr)
 {
 	struct resource *p = &iomem_resource;
-	int err = 0;
+	bool err = false;
 	loff_t l;
 	int size = PAGE_SIZE;
 
 	if (!strict_iomem_checks)
-		return 0;
+		return false;
 
 	addr = addr & PAGE_MASK;
 
@@ -1609,7 +1609,7 @@ int iomem_is_exclusive(u64 addr)
 			continue;
 		if (IS_ENABLED(CONFIG_IO_STRICT_DEVMEM)
 				|| p->flags & IORESOURCE_EXCLUSIVE) {
-			err = 1;
+			err = true;
 			break;
 		}
 	}

kernel/sched/core.c

@@ -4867,7 +4867,7 @@ SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len,
 
 	ret = sched_getaffinity(pid, mask);
 	if (ret == 0) {
-		size_t retlen = min_t(size_t, len, cpumask_size());
+		unsigned int retlen = min(len, cpumask_size());
 
 		if (copy_to_user(user_mask_ptr, mask, retlen))
 			ret = -EFAULT;

kernel/sysctl.c

@@ -218,6 +218,8 @@ static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
 static int proc_dostring_coredump(struct ctl_table *table, int write,
 		void __user *buffer, size_t *lenp, loff_t *ppos);
 #endif
+static int proc_dopipe_max_size(struct ctl_table *table, int write,
+		void __user *buffer, size_t *lenp, loff_t *ppos);
 
 #ifdef CONFIG_MAGIC_SYSRQ
 /* Note: sysrq code uses it's own private copy */
@@ -1812,8 +1814,7 @@ static struct ctl_table fs_table[] = {
 		.data		= &pipe_max_size,
 		.maxlen		= sizeof(pipe_max_size),
 		.mode		= 0644,
-		.proc_handler	= &pipe_proc_fn,
-		.extra1		= &pipe_min_size,
+		.proc_handler	= proc_dopipe_max_size,
 	},
 	{
 		.procname	= "pipe-user-pages-hard",
@@ -2615,29 +2616,17 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
 				 do_proc_douintvec_minmax_conv, &param);
 }
 
-struct do_proc_dopipe_max_size_conv_param {
-	unsigned int *min;
-};
-
 static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
 					unsigned int *valp,
 					int write, void *data)
 {
-	struct do_proc_dopipe_max_size_conv_param *param = data;
-
 	if (write) {
 		unsigned int val;
 
-		if (*lvalp > UINT_MAX)
-			return -EINVAL;
-
 		val = round_pipe_size(*lvalp);
 		if (val == 0)
 			return -EINVAL;
 
-		if (param->min && *param->min > val)
-			return -ERANGE;
-
 		*valp = val;
 	} else {
 		unsigned int val = *valp;
@@ -2647,14 +2636,11 @@ static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
 	return 0;
 }
 
-int proc_dopipe_max_size(struct ctl_table *table, int write,
-			 void __user *buffer, size_t *lenp, loff_t *ppos)
+static int proc_dopipe_max_size(struct ctl_table *table, int write,
+				void __user *buffer, size_t *lenp, loff_t *ppos)
 {
-	struct do_proc_dopipe_max_size_conv_param param = {
-		.min = (unsigned int *) table->extra1,
-	};
 	return do_proc_douintvec(table, write, buffer, lenp, ppos,
-				 do_proc_dopipe_max_size_conv, &param);
+				 do_proc_dopipe_max_size_conv, NULL);
 }
 
 static void validate_coredump_safety(void)
@@ -3160,12 +3146,6 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
 	return -ENOSYS;
 }
 
-int proc_dopipe_max_size(struct ctl_table *table, int write,
-			 void __user *buffer, size_t *lenp, loff_t *ppos)
-{
-	return -ENOSYS;
-}
-
 int proc_dointvec_jiffies(struct ctl_table *table, int write,
 		    void __user *buffer, size_t *lenp, loff_t *ppos)
 {
@@ -3209,7 +3189,6 @@ EXPORT_SYMBOL(proc_douintvec);
 EXPORT_SYMBOL(proc_dointvec_jiffies);
 EXPORT_SYMBOL(proc_dointvec_minmax);
 EXPORT_SYMBOL_GPL(proc_douintvec_minmax);
-EXPORT_SYMBOL_GPL(proc_dopipe_max_size);
 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
 EXPORT_SYMBOL(proc_dostring);

kernel/taskstats.c

@@ -194,11 +194,7 @@ static int fill_stats_for_pid(pid_t pid, struct taskstats *stats)
 {
 	struct task_struct *tsk;
 
-	rcu_read_lock();
-	tsk = find_task_by_vpid(pid);
-	if (tsk)
-		get_task_struct(tsk);
-	rcu_read_unlock();
+	tsk = find_get_task_by_vpid(pid);
 	if (!tsk)
 		return -ESRCH;
 	fill_stats(current_user_ns(), task_active_pid_ns(current), tsk, stats);

kernel/time/hrtimer.c

@@ -37,7 +37,6 @@
 #include <linux/hrtimer.h>
 #include <linux/notifier.h>
 #include <linux/syscalls.h>
-#include <linux/kallsyms.h>
 #include <linux/interrupt.h>
 #include <linux/tick.h>
 #include <linux/seq_file.h>

lib/Kconfig.debug

@@ -217,7 +217,7 @@ config ENABLE_MUST_CHECK
 config FRAME_WARN
 	int "Warn for stack frames larger than (needs gcc 4.4)"
 	range 0 8192
-	default 0 if KASAN
+	default 3072 if KASAN_EXTRA
 	default 2048 if GCC_PLUGIN_LATENT_ENTROPY
 	default 1280 if (!64BIT && PARISC)
 	default 1024 if (!64BIT && !PARISC)
@@ -1641,7 +1641,10 @@ config DMA_API_DEBUG
 
 	  If unsure, say N.
 
-menu "Runtime Testing"
+menuconfig RUNTIME_TESTING_MENU
+	bool "Runtime Testing"
+
+if RUNTIME_TESTING_MENU
 
 config LKDTM
 	tristate "Linux Kernel Dump Test Tool Module"
@@ -1841,7 +1844,7 @@ config TEST_BPF
 
 	  If unsure, say N.
 
-config TEST_FIND_BIT
+config FIND_BIT_BENCHMARK
 	tristate "Test find_bit functions"
 	default n
 	help
@@ -1929,7 +1932,7 @@ config TEST_DEBUG_VIRTUAL
 
 	  If unsure, say N.
 
-endmenu # runtime tests
+endif # RUNTIME_TESTING_MENU
 
 config MEMTEST
 	bool "Memtest"

lib/Kconfig.kasan

@@ -20,6 +20,17 @@ config KASAN
 	  Currently CONFIG_KASAN doesn't work with CONFIG_DEBUG_SLAB
 	  (the resulting kernel does not boot).
 
+config KASAN_EXTRA
+	bool "KAsan: extra checks"
+	depends on KASAN && DEBUG_KERNEL && !COMPILE_TEST
+	help
+	  This enables further checks in the kernel address sanitizer, for now
+	  it only includes the address-use-after-scope check that can lead
+	  to excessive kernel stack usage, frame size warnings and longer
+	  compile time.
+	  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 has more
+
+
 choice
 	prompt "Instrumentation type"
 	depends on KASAN

lib/Makefile

@@ -46,8 +46,8 @@ obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
 obj-y += hexdump.o
 obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o
 obj-y += kstrtox.o
+obj-$(CONFIG_FIND_BIT_BENCHMARK) += find_bit_benchmark.o
 obj-$(CONFIG_TEST_BPF) += test_bpf.o
-obj-$(CONFIG_TEST_FIND_BIT) += test_find_bit.o
 obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o
 obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
 obj-$(CONFIG_TEST_HASH) += test_hash.o test_siphash.o

lib/bitmap.c

@@ -1106,111 +1106,80 @@ int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
 EXPORT_SYMBOL(bitmap_allocate_region);
 
 /**
- * bitmap_from_u32array - copy the contents of a u32 array of bits to bitmap
- *	@bitmap: array of unsigned longs, the destination bitmap, non NULL
- *	@nbits: number of bits in @bitmap
- *	@buf: array of u32 (in host byte order), the source bitmap, non NULL
- *	@nwords: number of u32 words in @buf
- *
- * copy min(nbits, 32*nwords) bits from @buf to @bitmap, remaining
- * bits between nword and nbits in @bitmap (if any) are cleared. In
- * last word of @bitmap, the bits beyond nbits (if any) are kept
- * unchanged.
+ * bitmap_copy_le - copy a bitmap, putting the bits into little-endian order.
+ * @dst:   destination buffer
+ * @src:   bitmap to copy
+ * @nbits: number of bits in the bitmap
  *
- * Return the number of bits effectively copied.
+ * Require nbits % BITS_PER_LONG == 0.
  */
-unsigned int
-bitmap_from_u32array(unsigned long *bitmap, unsigned int nbits,
-		     const u32 *buf, unsigned int nwords)
+#ifdef __BIG_ENDIAN
+void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits)
 {
-	unsigned int dst_idx, src_idx;
-
-	for (src_idx = dst_idx = 0; dst_idx < BITS_TO_LONGS(nbits); ++dst_idx) {
-		unsigned long part = 0;
-
-		if (src_idx < nwords)
-			part = buf[src_idx++];
-
-#if BITS_PER_LONG == 64
-		if (src_idx < nwords)
-			part |= ((unsigned long) buf[src_idx++]) << 32;
-#endif
-
-		if (dst_idx < nbits/BITS_PER_LONG)
-			bitmap[dst_idx] = part;
-		else {
-			unsigned long mask = BITMAP_LAST_WORD_MASK(nbits);
+	unsigned int i;
 
-			bitmap[dst_idx] = (bitmap[dst_idx] & ~mask)
-				| (part & mask);
-		}
+	for (i = 0; i < nbits/BITS_PER_LONG; i++) {
+		if (BITS_PER_LONG == 64)
+			dst[i] = cpu_to_le64(src[i]);
+		else
+			dst[i] = cpu_to_le32(src[i]);
 	}
-
-	return min_t(unsigned int, nbits, 32*nwords);
 }
-EXPORT_SYMBOL(bitmap_from_u32array);
+EXPORT_SYMBOL(bitmap_copy_le);
+#endif
 
+#if BITS_PER_LONG == 64
 /**
- * bitmap_to_u32array - copy the contents of bitmap to a u32 array of bits
- *	@buf: array of u32 (in host byte order), the dest bitmap, non NULL
- *	@nwords: number of u32 words in @buf
- *	@bitmap: array of unsigned longs, the source bitmap, non NULL
+ * bitmap_from_arr32 - copy the contents of u32 array of bits to bitmap
+ *	@bitmap: array of unsigned longs, the destination bitmap
+ *	@buf: array of u32 (in host byte order), the source bitmap
  *	@nbits: number of bits in @bitmap
- *
- * copy min(nbits, 32*nwords) bits from @bitmap to @buf. Remaining
- * bits after nbits in @buf (if any) are cleared.
- *
- * Return the number of bits effectively copied.
  */
-unsigned int
-bitmap_to_u32array(u32 *buf, unsigned int nwords,
-		   const unsigned long *bitmap, unsigned int nbits)
+void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf,
+						unsigned int nbits)
 {
-	unsigned int dst_idx = 0, src_idx = 0;
-
-	while (dst_idx < nwords) {
-		unsigned long part = 0;
-
-		if (src_idx < BITS_TO_LONGS(nbits)) {
-			part = bitmap[src_idx];
-			if (src_idx >= nbits/BITS_PER_LONG)
-				part &= BITMAP_LAST_WORD_MASK(nbits);
-			src_idx++;
-		}
+	unsigned int i, halfwords;
 
-		buf[dst_idx++] = part & 0xffffffffUL;
+	if (!nbits)
+		return;
 
-#if BITS_PER_LONG == 64
-		if (dst_idx < nwords) {
-			part >>= 32;
-			buf[dst_idx++] = part & 0xffffffffUL;
-		}
-#endif
+	halfwords = DIV_ROUND_UP(nbits, 32);
+	for (i = 0; i < halfwords; i++) {
+		bitmap[i/2] = (unsigned long) buf[i];
+		if (++i < halfwords)
+			bitmap[i/2] |= ((unsigned long) buf[i]) << 32;
 	}
 
-	return min_t(unsigned int, nbits, 32*nwords);
+	/* Clear tail bits in last word beyond nbits. */
+	if (nbits % BITS_PER_LONG)
+		bitmap[(halfwords - 1) / 2] &= BITMAP_LAST_WORD_MASK(nbits);
 }
-EXPORT_SYMBOL(bitmap_to_u32array);
+EXPORT_SYMBOL(bitmap_from_arr32);
 
 /**
- * bitmap_copy_le - copy a bitmap, putting the bits into little-endian order.
- * @dst:   destination buffer
- * @src:   bitmap to copy
- * @nbits: number of bits in the bitmap
- *
- * Require nbits % BITS_PER_LONG == 0.
+ * bitmap_to_arr32 - copy the contents of bitmap to a u32 array of bits
+ *	@buf: array of u32 (in host byte order), the dest bitmap
+ *	@bitmap: array of unsigned longs, the source bitmap
+ *	@nbits: number of bits in @bitmap
  */
-#ifdef __BIG_ENDIAN
-void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits)
+void bitmap_to_arr32(u32 *buf, const unsigned long *bitmap, unsigned int nbits)
 {
-	unsigned int i;
+	unsigned int i, halfwords;
 
-	for (i = 0; i < nbits/BITS_PER_LONG; i++) {
-		if (BITS_PER_LONG == 64)
-			dst[i] = cpu_to_le64(src[i]);
-		else
-			dst[i] = cpu_to_le32(src[i]);
+	if (!nbits)
+		return;
+
+	halfwords = DIV_ROUND_UP(nbits, 32);
+	for (i = 0; i < halfwords; i++) {
+		buf[i] = (u32) (bitmap[i/2] & UINT_MAX);
+		if (++i < halfwords)
+			buf[i] = (u32) (bitmap[i/2] >> 32);
 	}
+
+	/* Clear tail bits in last element of array beyond nbits. */
+	if (nbits % BITS_PER_LONG)
+		buf[halfwords - 1] &= (u32) (UINT_MAX >> ((-nbits) & 31));
 }
-EXPORT_SYMBOL(bitmap_copy_le);
+EXPORT_SYMBOL(bitmap_to_arr32);
+
 #endif

lib/cpumask.c

@@ -33,10 +33,11 @@ EXPORT_SYMBOL(cpumask_next);
 int cpumask_next_and(int n, const struct cpumask *src1p,
 		     const struct cpumask *src2p)
 {
-	while ((n = cpumask_next(n, src1p)) < nr_cpu_ids)
-		if (cpumask_test_cpu(n, src2p))
-			break;
-	return n;
+	/* -1 is a legal arg here. */
+	if (n != -1)
+		cpumask_check(n);
+	return find_next_and_bit(cpumask_bits(src1p), cpumask_bits(src2p),
+		nr_cpumask_bits, n + 1);
 }
 EXPORT_SYMBOL(cpumask_next_and);
 

lib/find_bit.c

@@ -21,22 +21,29 @@
 #include <linux/export.h>
 #include <linux/kernel.h>
 
-#if !defined(find_next_bit) || !defined(find_next_zero_bit)
+#if !defined(find_next_bit) || !defined(find_next_zero_bit) || \
+		!defined(find_next_and_bit)
 
 /*
- * This is a common helper function for find_next_bit and
- * find_next_zero_bit.  The difference is the "invert" argument, which
- * is XORed with each fetched word before searching it for one bits.
+ * This is a common helper function for find_next_bit, find_next_zero_bit, and
+ * find_next_and_bit. The differences are:
+ *  - The "invert" argument, which is XORed with each fetched word before
+ *    searching it for one bits.
+ *  - The optional "addr2", which is anded with "addr1" if present.
  */
-static unsigned long _find_next_bit(const unsigned long *addr,
-		unsigned long nbits, unsigned long start, unsigned long invert)
+static inline unsigned long _find_next_bit(const unsigned long *addr1,
+		const unsigned long *addr2, unsigned long nbits,
+		unsigned long start, unsigned long invert)
 {
 	unsigned long tmp;
 
 	if (unlikely(start >= nbits))
 		return nbits;
 
-	tmp = addr[start / BITS_PER_LONG] ^ invert;
+	tmp = addr1[start / BITS_PER_LONG];
+	if (addr2)
+		tmp &= addr2[start / BITS_PER_LONG];
+	tmp ^= invert;
 
 	/* Handle 1st word. */
 	tmp &= BITMAP_FIRST_WORD_MASK(start);
@@ -47,7 +54,10 @@ static unsigned long _find_next_bit(const unsigned long *addr,
 		if (start >= nbits)
 			return nbits;
 
-		tmp = addr[start / BITS_PER_LONG] ^ invert;
+		tmp = addr1[start / BITS_PER_LONG];
+		if (addr2)
+			tmp &= addr2[start / BITS_PER_LONG];
+		tmp ^= invert;
 	}
 
 	return min(start + __ffs(tmp), nbits);
@@ -61,7 +71,7 @@ static unsigned long _find_next_bit(const unsigned long *addr,
 unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
 			    unsigned long offset)
 {
-	return _find_next_bit(addr, size, offset, 0UL);
+	return _find_next_bit(addr, NULL, size, offset, 0UL);
 }
 EXPORT_SYMBOL(find_next_bit);
 #endif
@@ -70,11 +80,21 @@ EXPORT_SYMBOL(find_next_bit);
 unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
 				 unsigned long offset)
 {
-	return _find_next_bit(addr, size, offset, ~0UL);
+	return _find_next_bit(addr, NULL, size, offset, ~0UL);
 }
 EXPORT_SYMBOL(find_next_zero_bit);
 #endif
 
+#if !defined(find_next_and_bit)
+unsigned long find_next_and_bit(const unsigned long *addr1,
+		const unsigned long *addr2, unsigned long size,
+		unsigned long offset)
+{
+	return _find_next_bit(addr1, addr2, size, offset, 0UL);
+}
+EXPORT_SYMBOL(find_next_and_bit);
+#endif
+
 #ifndef find_first_bit
 /*
  * Find the first set bit in a memory region.
@@ -146,15 +166,19 @@ static inline unsigned long ext2_swab(const unsigned long y)
 }
 
 #if !defined(find_next_bit_le) || !defined(find_next_zero_bit_le)
-static unsigned long _find_next_bit_le(const unsigned long *addr,
-		unsigned long nbits, unsigned long start, unsigned long invert)
+static inline unsigned long _find_next_bit_le(const unsigned long *addr1,
+		const unsigned long *addr2, unsigned long nbits,
+		unsigned long start, unsigned long invert)
 {
 	unsigned long tmp;
 
 	if (unlikely(start >= nbits))
 		return nbits;
 
-	tmp = addr[start / BITS_PER_LONG] ^ invert;
+	tmp = addr1[start / BITS_PER_LONG];
+	if (addr2)
+		tmp &= addr2[start / BITS_PER_LONG];
+	tmp ^= invert;
 
 	/* Handle 1st word. */
 	tmp &= ext2_swab(BITMAP_FIRST_WORD_MASK(start));
@@ -165,7 +189,10 @@ static unsigned long _find_next_bit_le(const unsigned long *addr,
 		if (start >= nbits)
 			return nbits;
 
-		tmp = addr[start / BITS_PER_LONG] ^ invert;
+		tmp = addr1[start / BITS_PER_LONG];
+		if (addr2)
+			tmp &= addr2[start / BITS_PER_LONG];
+		tmp ^= invert;
 	}
 
 	return min(start + __ffs(ext2_swab(tmp)), nbits);
@@ -176,7 +203,7 @@ static unsigned long _find_next_bit_le(const unsigned long *addr,
 unsigned long find_next_zero_bit_le(const void *addr, unsigned
 		long size, unsigned long offset)
 {
-	return _find_next_bit_le(addr, size, offset, ~0UL);
+	return _find_next_bit_le(addr, NULL, size, offset, ~0UL);
 }
 EXPORT_SYMBOL(find_next_zero_bit_le);
 #endif
@@ -185,7 +212,7 @@ EXPORT_SYMBOL(find_next_zero_bit_le);
 unsigned long find_next_bit_le(const void *addr, unsigned
 		long size, unsigned long offset)
 {
-	return _find_next_bit_le(addr, size, offset, 0UL);
+	return _find_next_bit_le(addr, NULL, size, offset, 0UL);
 }
 EXPORT_SYMBOL(find_next_bit_le);
 #endif

lib/test_find_bit.c → lib/find_bit_benchmark.c

@@ -35,6 +35,7 @@
 #define SPARSE		500
 
 static DECLARE_BITMAP(bitmap, BITMAP_LEN) __initdata;
+static DECLARE_BITMAP(bitmap2, BITMAP_LEN) __initdata;
 
 /*
  * This is Schlemiel the Painter's algorithm. It should be called after
@@ -43,16 +44,15 @@ static DECLARE_BITMAP(bitmap, BITMAP_LEN) __initdata;
 static int __init test_find_first_bit(void *bitmap, unsigned long len)
 {
 	unsigned long i, cnt;
-	cycles_t cycles;
+	ktime_t time;
 
-	cycles = get_cycles();
+	time = ktime_get();
 	for (cnt = i = 0; i < len; cnt++) {
 		i = find_first_bit(bitmap, len);
 		__clear_bit(i, bitmap);
 	}
-	cycles = get_cycles() - cycles;
-	pr_err("find_first_bit:\t\t%llu cycles,\t%ld iterations\n",
-	       (u64)cycles, cnt);
+	time = ktime_get() - time;
+	pr_err("find_first_bit:     %18llu ns, %6ld iterations\n", time, cnt);
 
 	return 0;
 }
@@ -60,14 +60,13 @@ static int __init test_find_first_bit(void *bitmap, unsigned long len)
 static int __init test_find_next_bit(const void *bitmap, unsigned long len)
 {
 	unsigned long i, cnt;
-	cycles_t cycles;
+	ktime_t time;
 
-	cycles = get_cycles();
+	time = ktime_get();
 	for (cnt = i = 0; i < BITMAP_LEN; cnt++)
 		i = find_next_bit(bitmap, BITMAP_LEN, i) + 1;
-	cycles = get_cycles() - cycles;
-	pr_err("find_next_bit:\t\t%llu cycles,\t%ld iterations\n",
-	       (u64)cycles, cnt);
+	time = ktime_get() - time;
+	pr_err("find_next_bit:      %18llu ns, %6ld iterations\n", time, cnt);
 
 	return 0;
 }
@@ -75,14 +74,13 @@ static int __init test_find_next_bit(const void *bitmap, unsigned long len)
 static int __init test_find_next_zero_bit(const void *bitmap, unsigned long len)
 {
 	unsigned long i, cnt;
-	cycles_t cycles;
+	ktime_t time;
 
-	cycles = get_cycles();
+	time = ktime_get();
 	for (cnt = i = 0; i < BITMAP_LEN; cnt++)
 		i = find_next_zero_bit(bitmap, len, i) + 1;
-	cycles = get_cycles() - cycles;
-	pr_err("find_next_zero_bit:\t%llu cycles,\t%ld iterations\n",
-	       (u64)cycles, cnt);
+	time = ktime_get() - time;
+	pr_err("find_next_zero_bit: %18llu ns, %6ld iterations\n", time, cnt);
 
 	return 0;
 }
@@ -90,9 +88,9 @@ static int __init test_find_next_zero_bit(const void *bitmap, unsigned long len)
 static int __init test_find_last_bit(const void *bitmap, unsigned long len)
 {
 	unsigned long l, cnt = 0;
-	cycles_t cycles;
+	ktime_t time;
 
-	cycles = get_cycles();
+	time = ktime_get();
 	do {
 		cnt++;
 		l = find_last_bit(bitmap, len);
@@ -100,9 +98,24 @@ static int __init test_find_last_bit(const void *bitmap, unsigned long len)
 			break;
 		len = l;
 	} while (len);
+	time = ktime_get() - time;
+	pr_err("find_last_bit:      %18llu ns, %6ld iterations\n", time, cnt);
+
+	return 0;
+}
+
+static int __init test_find_next_and_bit(const void *bitmap,
+		const void *bitmap2, unsigned long len)
+{
+	unsigned long i, cnt;
+	cycles_t cycles;
+
+	cycles = get_cycles();
+	for (cnt = i = 0; i < BITMAP_LEN; cnt++)
+		i = find_next_and_bit(bitmap, bitmap2, BITMAP_LEN, i+1);
 	cycles = get_cycles() - cycles;
-	pr_err("find_last_bit:\t\t%llu cycles,\t%ld iterations\n",
-	       (u64)cycles, cnt);
+	pr_err("find_next_and_bit:\t\t%llu cycles, %ld iterations\n",
+		(u64)cycles, cnt);
 
 	return 0;
 }
@@ -114,31 +127,36 @@ static int __init find_bit_test(void)
 	pr_err("\nStart testing find_bit() with random-filled bitmap\n");
 
 	get_random_bytes(bitmap, sizeof(bitmap));
+	get_random_bytes(bitmap2, sizeof(bitmap2));
 
 	test_find_next_bit(bitmap, BITMAP_LEN);
 	test_find_next_zero_bit(bitmap, BITMAP_LEN);
 	test_find_last_bit(bitmap, BITMAP_LEN);
 	test_find_first_bit(bitmap, BITMAP_LEN);
+	test_find_next_and_bit(bitmap, bitmap2, BITMAP_LEN);
 
 	pr_err("\nStart testing find_bit() with sparse bitmap\n");
 
 	bitmap_zero(bitmap, BITMAP_LEN);
+	bitmap_zero(bitmap2, BITMAP_LEN);
 
-	while (nbits--)
+	while (nbits--) {
 		__set_bit(prandom_u32() % BITMAP_LEN, bitmap);
+		__set_bit(prandom_u32() % BITMAP_LEN, bitmap2);
+	}
 
 	test_find_next_bit(bitmap, BITMAP_LEN);
 	test_find_next_zero_bit(bitmap, BITMAP_LEN);
 	test_find_last_bit(bitmap, BITMAP_LEN);
 	test_find_first_bit(bitmap, BITMAP_LEN);
+	test_find_next_and_bit(bitmap, bitmap2, BITMAP_LEN);
 
-	return 0;
+	/*
+	 * Everything is OK. Return error just to let user run benchmark
+	 * again without annoying rmmod.
+	 */
+	return -EINVAL;
 }
 module_init(find_bit_test);
 
-static void __exit test_find_bit_cleanup(void)
-{
-}
-module_exit(test_find_bit_cleanup);
-
 MODULE_LICENSE("GPL");

lib/stackdepot.c

@@ -163,6 +163,21 @@ static inline u32 hash_stack(unsigned long *entries, unsigned int size)
 			       STACK_HASH_SEED);
 }
 
+/* Use our own, non-instrumented version of memcmp().
+ *
+ * We actually don't care about the order, just the equality.
+ */
+static inline
+int stackdepot_memcmp(const unsigned long *u1, const unsigned long *u2,
+			unsigned int n)
+{
+	for ( ; n-- ; u1++, u2++) {
+		if (*u1 != *u2)
+			return 1;
+	}
+	return 0;
+}
+
 /* Find a stack that is equal to the one stored in entries in the hash */
 static inline struct stack_record *find_stack(struct stack_record *bucket,
 					     unsigned long *entries, int size,
@@ -173,10 +188,8 @@ static inline struct stack_record *find_stack(struct stack_record *bucket,
 	for (found = bucket; found; found = found->next) {
 		if (found->hash == hash &&
 		    found->size == size &&
-		    !memcmp(entries, found->entries,
-			    size * sizeof(unsigned long))) {
+		    !stackdepot_memcmp(entries, found->entries, size))
 			return found;
-		}
 	}
 	return NULL;
 }

lib/test_bitmap.c

@@ -23,7 +23,7 @@ __check_eq_uint(const char *srcfile, unsigned int line,
 		const unsigned int exp_uint, unsigned int x)
 {
 	if (exp_uint != x) {
-		pr_warn("[%s:%u] expected %u, got %u\n",
+		pr_err("[%s:%u] expected %u, got %u\n",
 			srcfile, line, exp_uint, x);
 		return false;
 	}
@@ -33,19 +33,13 @@ __check_eq_uint(const char *srcfile, unsigned int line,
 
 static bool __init
 __check_eq_bitmap(const char *srcfile, unsigned int line,
-		  const unsigned long *exp_bmap, unsigned int exp_nbits,
-		  const unsigned long *bmap, unsigned int nbits)
+		  const unsigned long *exp_bmap, const unsigned long *bmap,
+		  unsigned int nbits)
 {
-	if (exp_nbits != nbits) {
-		pr_warn("[%s:%u] bitmap length mismatch: expected %u, got %u\n",
-			srcfile, line, exp_nbits, nbits);
-		return false;
-	}
-
 	if (!bitmap_equal(exp_bmap, bmap, nbits)) {
 		pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
 			srcfile, line,
-			exp_nbits, exp_bmap, nbits, bmap);
+			nbits, exp_bmap, nbits, bmap);
 		return false;
 	}
 	return true;
@@ -66,6 +60,10 @@ __check_eq_pbl(const char *srcfile, unsigned int line,
 	return true;
 }
 
+static bool __init
+__check_eq_u32_array(const char *srcfile, unsigned int line,
+		     const u32 *exp_arr, unsigned int exp_len,
+		     const u32 *arr, unsigned int len) __used;
 static bool __init
 __check_eq_u32_array(const char *srcfile, unsigned int line,
 		     const u32 *exp_arr, unsigned int exp_len,
@@ -107,7 +105,65 @@ __check_eq_u32_array(const char *srcfile, unsigned int line,
 #define expect_eq_pbl(...)		__expect_eq(pbl, ##__VA_ARGS__)
 #define expect_eq_u32_array(...)	__expect_eq(u32_array, ##__VA_ARGS__)
 
-static void __init test_zero_fill_copy(void)
+static void __init test_zero_clear(void)
+{
+	DECLARE_BITMAP(bmap, 1024);
+
+	/* Known way to set all bits */
+	memset(bmap, 0xff, 128);
+
+	expect_eq_pbl("0-22", bmap, 23);
+	expect_eq_pbl("0-1023", bmap, 1024);
+
+	/* single-word bitmaps */
+	bitmap_clear(bmap, 0, 9);
+	expect_eq_pbl("9-1023", bmap, 1024);
+
+	bitmap_zero(bmap, 35);
+	expect_eq_pbl("64-1023", bmap, 1024);
+
+	/* cross boundaries operations */
+	bitmap_clear(bmap, 79, 19);
+	expect_eq_pbl("64-78,98-1023", bmap, 1024);
+
+	bitmap_zero(bmap, 115);
+	expect_eq_pbl("128-1023", bmap, 1024);
+
+	/* Zeroing entire area */
+	bitmap_zero(bmap, 1024);
+	expect_eq_pbl("", bmap, 1024);
+}
+
+static void __init test_fill_set(void)
+{
+	DECLARE_BITMAP(bmap, 1024);
+
+	/* Known way to clear all bits */
+	memset(bmap, 0x00, 128);
+
+	expect_eq_pbl("", bmap, 23);
+	expect_eq_pbl("", bmap, 1024);
+
+	/* single-word bitmaps */
+	bitmap_set(bmap, 0, 9);
+	expect_eq_pbl("0-8", bmap, 1024);
+
+	bitmap_fill(bmap, 35);
+	expect_eq_pbl("0-63", bmap, 1024);
+
+	/* cross boundaries operations */
+	bitmap_set(bmap, 79, 19);
+	expect_eq_pbl("0-63,79-97", bmap, 1024);
+
+	bitmap_fill(bmap, 115);
+	expect_eq_pbl("0-127", bmap, 1024);
+
+	/* Zeroing entire area */
+	bitmap_fill(bmap, 1024);
+	expect_eq_pbl("0-1023", bmap, 1024);
+}
+
+static void __init test_copy(void)
 {
 	DECLARE_BITMAP(bmap1, 1024);
 	DECLARE_BITMAP(bmap2, 1024);
@@ -116,36 +172,20 @@ static void __init test_zero_fill_copy(void)
 	bitmap_zero(bmap2, 1024);
 
 	/* single-word bitmaps */
-	expect_eq_pbl("", bmap1, 23);
-
-	bitmap_fill(bmap1, 19);
-	expect_eq_pbl("0-18", bmap1, 1024);
-
+	bitmap_set(bmap1, 0, 19);
 	bitmap_copy(bmap2, bmap1, 23);
 	expect_eq_pbl("0-18", bmap2, 1024);
 
-	bitmap_fill(bmap2, 23);
-	expect_eq_pbl("0-22", bmap2, 1024);
-
+	bitmap_set(bmap2, 0, 23);
 	bitmap_copy(bmap2, bmap1, 23);
 	expect_eq_pbl("0-18", bmap2, 1024);
 
-	bitmap_zero(bmap1, 23);
-	expect_eq_pbl("", bmap1, 1024);
-
 	/* multi-word bitmaps */
-	bitmap_zero(bmap1, 1024);
-	expect_eq_pbl("", bmap1, 1024);
-
-	bitmap_fill(bmap1, 109);
-	expect_eq_pbl("0-108", bmap1, 1024);
-
+	bitmap_set(bmap1, 0, 109);
 	bitmap_copy(bmap2, bmap1, 1024);
 	expect_eq_pbl("0-108", bmap2, 1024);
 
 	bitmap_fill(bmap2, 1024);
-	expect_eq_pbl("0-1023", bmap2, 1024);
-
 	bitmap_copy(bmap2, bmap1, 1024);
 	expect_eq_pbl("0-108", bmap2, 1024);
 
@@ -160,9 +200,6 @@ static void __init test_zero_fill_copy(void)
 	bitmap_fill(bmap2, 1024);
 	bitmap_copy(bmap2, bmap1, 97);  /* ... but aligned on word length */
 	expect_eq_pbl("0-108,128-1023", bmap2, 1024);
-
-	bitmap_zero(bmap2, 97);  /* ... but 0-padded til word length */
-	expect_eq_pbl("128-1023", bmap2, 1024);
 }
 
 #define PARSE_TIME 0x1
@@ -255,171 +292,29 @@ static void __init test_bitmap_parselist(void)
 	}
 }
 
-static void __init test_bitmap_u32_array_conversions(void)
+static void __init test_bitmap_arr32(void)
 {
-	DECLARE_BITMAP(bmap1, 1024);
-	DECLARE_BITMAP(bmap2, 1024);
-	u32 exp_arr[32], arr[32];
-	unsigned nbits;
-
-	for (nbits = 0 ; nbits < 257 ; ++nbits) {
-		const unsigned int used_u32s = DIV_ROUND_UP(nbits, 32);
-		unsigned int i, rv;
-
-		bitmap_zero(bmap1, nbits);
-		bitmap_set(bmap1, nbits, 1024 - nbits);  /* garbage */
-
-		memset(arr, 0xff, sizeof(arr));
-		rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
-		expect_eq_uint(nbits, rv);
-
-		memset(exp_arr, 0xff, sizeof(exp_arr));
-		memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
-		expect_eq_u32_array(exp_arr, 32, arr, 32);
-
-		bitmap_fill(bmap2, 1024);
-		rv = bitmap_from_u32array(bmap2, nbits, arr, used_u32s);
-		expect_eq_uint(nbits, rv);
-		expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
-
-		for (i = 0 ; i < nbits ; ++i) {
-			/*
-			 * test conversion bitmap -> u32[]
-			 */
-
-			bitmap_zero(bmap1, 1024);
-			__set_bit(i, bmap1);
-			bitmap_set(bmap1, nbits, 1024 - nbits);  /* garbage */
-
-			memset(arr, 0xff, sizeof(arr));
-			rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
-			expect_eq_uint(nbits, rv);
-
-			/* 1st used u32 words contain expected bit set, the
-			 * remaining words are left unchanged (0xff)
-			 */
-			memset(exp_arr, 0xff, sizeof(exp_arr));
-			memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
-			exp_arr[i/32] = (1U<<(i%32));
-			expect_eq_u32_array(exp_arr, 32, arr, 32);
-
-
-			/* same, with longer array to fill
-			 */
-			memset(arr, 0xff, sizeof(arr));
-			rv = bitmap_to_u32array(arr, 32, bmap1, nbits);
-			expect_eq_uint(nbits, rv);
-
-			/* 1st used u32 words contain expected bit set, the
-			 * remaining words are all 0s
-			 */
-			memset(exp_arr, 0, sizeof(exp_arr));
-			exp_arr[i/32] = (1U<<(i%32));
-			expect_eq_u32_array(exp_arr, 32, arr, 32);
-
-			/*
-			 * test conversion u32[] -> bitmap
-			 */
-
-			/* the 1st nbits of bmap2 are identical to
-			 * bmap1, the remaining bits of bmap2 are left
-			 * unchanged (all 1s)
-			 */
-			bitmap_fill(bmap2, 1024);
-			rv = bitmap_from_u32array(bmap2, nbits,
-						  exp_arr, used_u32s);
-			expect_eq_uint(nbits, rv);
-
-			expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
-
-			/* same, with more bits to fill
-			 */
-			memset(arr, 0xff, sizeof(arr));  /* garbage */
-			memset(arr, 0, used_u32s*sizeof(u32));
-			arr[i/32] = (1U<<(i%32));
-
-			bitmap_fill(bmap2, 1024);
-			rv = bitmap_from_u32array(bmap2, 1024, arr, used_u32s);
-			expect_eq_uint(used_u32s*32, rv);
-
-			/* the 1st nbits of bmap2 are identical to
-			 * bmap1, the remaining bits of bmap2 are cleared
-			 */
-			bitmap_zero(bmap1, 1024);
-			__set_bit(i, bmap1);
-			expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
-
-
-			/*
-			 * test short conversion bitmap -> u32[] (1
-			 * word too short)
-			 */
-			if (used_u32s > 1) {
-				bitmap_zero(bmap1, 1024);
-				__set_bit(i, bmap1);
-				bitmap_set(bmap1, nbits,
-					   1024 - nbits);  /* garbage */
-				memset(arr, 0xff, sizeof(arr));
-
-				rv = bitmap_to_u32array(arr, used_u32s - 1,
-							bmap1, nbits);
-				expect_eq_uint((used_u32s - 1)*32, rv);
-
-				/* 1st used u32 words contain expected
-				 * bit set, the remaining words are
-				 * left unchanged (0xff)
-				 */
-				memset(exp_arr, 0xff, sizeof(exp_arr));
-				memset(exp_arr, 0,
-				       (used_u32s-1)*sizeof(*exp_arr));
-				if ((i/32) < (used_u32s - 1))
-					exp_arr[i/32] = (1U<<(i%32));
-				expect_eq_u32_array(exp_arr, 32, arr, 32);
-			}
-
-			/*
-			 * test short conversion u32[] -> bitmap (3
-			 * bits too short)
-			 */
-			if (nbits > 3) {
-				memset(arr, 0xff, sizeof(arr));  /* garbage */
-				memset(arr, 0, used_u32s*sizeof(*arr));
-				arr[i/32] = (1U<<(i%32));
-
-				bitmap_zero(bmap1, 1024);
-				rv = bitmap_from_u32array(bmap1, nbits - 3,
-							  arr, used_u32s);
-				expect_eq_uint(nbits - 3, rv);
-
-				/* we are expecting the bit < nbits -
-				 * 3 (none otherwise), and the rest of
-				 * bmap1 unchanged (0-filled)
-				 */
-				bitmap_zero(bmap2, 1024);
-				if (i < nbits - 3)
-					__set_bit(i, bmap2);
-				expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
-
-				/* do the same with bmap1 initially
-				 * 1-filled
-				 */
-
-				bitmap_fill(bmap1, 1024);
-				rv = bitmap_from_u32array(bmap1, nbits - 3,
-							 arr, used_u32s);
-				expect_eq_uint(nbits - 3, rv);
-
-				/* we are expecting the bit < nbits -
-				 * 3 (none otherwise), and the rest of
-				 * bmap1 unchanged (1-filled)
-				 */
-				bitmap_zero(bmap2, 1024);
-				if (i < nbits - 3)
-					__set_bit(i, bmap2);
-				bitmap_set(bmap2, nbits-3, 1024 - nbits + 3);
-				expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
-			}
-		}
+	unsigned int nbits, next_bit, len = sizeof(exp) * 8;
+	u32 arr[sizeof(exp) / 4];
+	DECLARE_BITMAP(bmap2, len);
+
+	memset(arr, 0xa5, sizeof(arr));
+
+	for (nbits = 0; nbits < len; ++nbits) {
+		bitmap_to_arr32(arr, exp, nbits);
+		bitmap_from_arr32(bmap2, arr, nbits);
+		expect_eq_bitmap(bmap2, exp, nbits);
+
+		next_bit = find_next_bit(bmap2,
+				round_up(nbits, BITS_PER_LONG), nbits);
+		if (next_bit < round_up(nbits, BITS_PER_LONG))
+			pr_err("bitmap_copy_arr32(nbits == %d:"
+				" tail is not safely cleared: %d\n",
+				nbits, next_bit);
+
+		if (nbits < len - 32)
+			expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
+								0xa5a5a5a5);
 	}
 }
 
@@ -453,8 +348,10 @@ static void noinline __init test_mem_optimisations(void)
 
 static int __init test_bitmap_init(void)
 {
-	test_zero_fill_copy();
-	test_bitmap_u32_array_conversions();
+	test_zero_clear();
+	test_fill_set();
+	test_copy();
+	test_bitmap_arr32();
 	test_bitmap_parselist();
 	test_mem_optimisations();
 

lib/test_kasan.c

@@ -94,6 +94,37 @@ static noinline void __init kmalloc_pagealloc_oob_right(void)
 	ptr[size] = 0;
 	kfree(ptr);
 }
+
+static noinline void __init kmalloc_pagealloc_uaf(void)
+{
+	char *ptr;
+	size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
+
+	pr_info("kmalloc pagealloc allocation: use-after-free\n");
+	ptr = kmalloc(size, GFP_KERNEL);
+	if (!ptr) {
+		pr_err("Allocation failed\n");
+		return;
+	}
+
+	kfree(ptr);
+	ptr[0] = 0;
+}
+
+static noinline void __init kmalloc_pagealloc_invalid_free(void)
+{
+	char *ptr;
+	size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
+
+	pr_info("kmalloc pagealloc allocation: invalid-free\n");
+	ptr = kmalloc(size, GFP_KERNEL);
+	if (!ptr) {
+		pr_err("Allocation failed\n");
+		return;
+	}
+
+	kfree(ptr + 1);
+}
 #endif
 
 static noinline void __init kmalloc_large_oob_right(void)
@@ -388,7 +419,7 @@ static noinline void __init kasan_stack_oob(void)
 static noinline void __init ksize_unpoisons_memory(void)
 {
 	char *ptr;
-	size_t size = 123, real_size = size;
+	size_t size = 123, real_size;
 
 	pr_info("ksize() unpoisons the whole allocated chunk\n");
 	ptr = kmalloc(size, GFP_KERNEL);
@@ -472,6 +503,74 @@ static noinline void __init use_after_scope_test(void)
 	p[1023] = 1;
 }
 
+static noinline void __init kasan_alloca_oob_left(void)
+{
+	volatile int i = 10;
+	char alloca_array[i];
+	char *p = alloca_array - 1;
+
+	pr_info("out-of-bounds to left on alloca\n");
+	*(volatile char *)p;
+}
+
+static noinline void __init kasan_alloca_oob_right(void)
+{
+	volatile int i = 10;
+	char alloca_array[i];
+	char *p = alloca_array + i;
+
+	pr_info("out-of-bounds to right on alloca\n");
+	*(volatile char *)p;
+}
+
+static noinline void __init kmem_cache_double_free(void)
+{
+	char *p;
+	size_t size = 200;
+	struct kmem_cache *cache;
+
+	cache = kmem_cache_create("test_cache", size, 0, 0, NULL);
+	if (!cache) {
+		pr_err("Cache allocation failed\n");
+		return;
+	}
+	pr_info("double-free on heap object\n");
+	p = kmem_cache_alloc(cache, GFP_KERNEL);
+	if (!p) {
+		pr_err("Allocation failed\n");
+		kmem_cache_destroy(cache);
+		return;
+	}
+
+	kmem_cache_free(cache, p);
+	kmem_cache_free(cache, p);
+	kmem_cache_destroy(cache);
+}
+
+static noinline void __init kmem_cache_invalid_free(void)
+{
+	char *p;
+	size_t size = 200;
+	struct kmem_cache *cache;
+
+	cache = kmem_cache_create("test_cache", size, 0, SLAB_TYPESAFE_BY_RCU,
+				  NULL);
+	if (!cache) {
+		pr_err("Cache allocation failed\n");
+		return;
+	}
+	pr_info("invalid-free of heap object\n");
+	p = kmem_cache_alloc(cache, GFP_KERNEL);
+	if (!p) {
+		pr_err("Allocation failed\n");
+		kmem_cache_destroy(cache);
+		return;
+	}
+
+	kmem_cache_free(cache, p + 1);
+	kmem_cache_destroy(cache);
+}
+
 static int __init kmalloc_tests_init(void)
 {
 	/*
@@ -485,6 +584,8 @@ static int __init kmalloc_tests_init(void)
 	kmalloc_node_oob_right();
 #ifdef CONFIG_SLUB
 	kmalloc_pagealloc_oob_right();
+	kmalloc_pagealloc_uaf();
+	kmalloc_pagealloc_invalid_free();
 #endif
 	kmalloc_large_oob_right();
 	kmalloc_oob_krealloc_more();
@@ -502,9 +603,13 @@ static int __init kmalloc_tests_init(void)
 	memcg_accounted_kmem_cache();
 	kasan_stack_oob();
 	kasan_global_oob();
+	kasan_alloca_oob_left();
+	kasan_alloca_oob_right();
 	ksize_unpoisons_memory();
 	copy_user_test();
 	use_after_scope_test();
+	kmem_cache_double_free();
+	kmem_cache_invalid_free();
 
 	kasan_restore_multi_shot(multishot);
 

lib/test_sort.c

@@ -39,5 +39,11 @@ exit:
 	return err;
 }
 
+static void __exit test_sort_exit(void)
+{
+}
+
 module_init(test_sort_init);
+module_exit(test_sort_exit);
+
 MODULE_LICENSE("GPL");