[IA64] Keep format strings from leaking into printk

The buffer being sent to printk has already had format strings
resolved. The string should not be reinterpreted again to avoid any
unintended format strings from leaking into printk.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/mca.c

@@ -217,7 +217,7 @@ void ia64_mca_printk(const char *fmt, ...)
 	/* Copy the output into mlogbuf */
 	if (oops_in_progress) {
 		/* mlogbuf was abandoned, use printk directly instead. */
-		printk(temp_buf);
+		printk("%s", temp_buf);
 	} else {
 		spin_lock(&mlogbuf_wlock);
 		for (p = temp_buf; *p; p++) {
@@ -268,7 +268,7 @@ void ia64_mlogbuf_dump(void)
 		}
 		*p = '\0';
 		if (temp_buf[0])
-			printk(temp_buf);
+			printk("%s", temp_buf);
 		mlogbuf_start = index;
 
 		mlogbuf_timestamp = 0;