Commit 16a2164b authored May 14, 2010 by Hugh Dickins Committed by Linus Torvalds May 14, 2010

profile: fix stats and data leakage



If the kernel is large or the profiling step small, /proc/profile
leaks data and readprofile shows silly stats, until readprofile -r
has reset the buffer: clear the prof_buffer when it is vmalloc()ed.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent bfcc6e2e

kernel/profile.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -127,8 +127,10 @@ int __ref profile_init(void)
		return 0;

		prof_buffer = vmalloc(buffer_bytes);
		if (prof_buffer)
		if (prof_buffer) {
		memset(prof_buffer, 0, buffer_bytes);
		return 0;
		}

		free_cpumask_var(prof_cpu_mask);
		return -ENOMEM;