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| author | Hugh Dickins <hughd@google.com> | 2010-05-14 19:44:10 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-26 14:32:09 -0700 |
| commit | 6464a9f78632cdce047062512aeed584e66985c0 (patch) | |
| tree | 85f9a45b791f1426de9bf5fa90c09d130462111d /kernel | |
| parent | bd2000ae380153185705f2e80f2c676c1a5337e6 (diff) | |
| download | kernel-crypto-6464a9f78632cdce047062512aeed584e66985c0.tar.gz kernel-crypto-6464a9f78632cdce047062512aeed584e66985c0.tar.xz kernel-crypto-6464a9f78632cdce047062512aeed584e66985c0.zip | |
profile: fix stats and data leakage
commit 16a2164bb03612efe79a76c73da6da44445b9287 upstream.
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/profile.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/profile.c b/kernel/profile.c index a55d3a367ae..dfadc5b729f 100644 --- a/kernel/profile.c +++ b/kernel/profile.c @@ -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; |