kasan: change report header

Change report header format from:

  BUG: KASAN: use-after-free in unwind_get_return_address+0x28a/0x2c0 at addr ffff880069437950
  Read of size 8 by task insmod/3925

to:

  BUG: KASAN: use-after-free in unwind_get_return_address+0x28a/0x2c0
  Read of size 8 at addr ffff880069437950 by task insmod/3925

The exact access address is not usually important, so move it to the
second line.  This also makes the header look visually balanced.

Link: http://lkml.kernel.org/r/20170302134851.101218-6-andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/kasan/report.c

@@ -132,11 +132,11 @@ static void print_error_description(struct kasan_access_info *info)
 {
 	const char *bug_type = get_bug_type(info);
 
-	pr_err("BUG: KASAN: %s in %pS at addr %p\n",
-		bug_type, (void *)info->ip, info->access_addr);
-	pr_err("%s of size %zu by task %s/%d\n",
+	pr_err("BUG: KASAN: %s in %pS\n",
+		bug_type, (void *)info->ip);
+	pr_err("%s of size %zu at addr %p by task %s/%d\n",
 		info->is_write ? "Write" : "Read", info->access_size,
-		current->comm, task_pid_nr(current));
+		info->access_addr, current->comm, task_pid_nr(current));
 }
 
 static inline bool kernel_or_module_addr(const void *addr)