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| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2016-05-05 16:22:35 -0700 |
|---|---|---|
| committer | Paul Lawrence <paullawrence@google.com> | 2017-12-14 08:20:02 -0800 |
| commit | 205c0c95f9f654d414de676406a240127d051fe7 (patch) | |
| tree | ca8347ff1b2662bd900aa0677b2a6ac784d43627 /mm/slab_common.c | |
| parent | 5156a49621ae5be3c168587ffca8f772968f6a66 (diff) | |
UPSTREAM: lib/stackdepot: avoid to return 0 handle
Recently, we allow to save the stacktrace whose hashed value is 0. It
causes the problem that stackdepot could return 0 even if in success.
User of stackdepot cannot distinguish whether it is success or not so we
need to solve this problem. In this patch, 1 bit are added to handle
and make valid handle none 0 by setting this bit. After that, valid
handle will not be 0 and 0 handle will represent failure correctly.
Fixes: 33334e25769c ("lib/stackdepot.c: allow the stack trace hash to be zero")
Link: http://lkml.kernel.org/r/1462252403-1106-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bug: 64145065
(cherry-picked from 7c31190bcfdbff225950902a9f226e4eb79ca94f)
Change-Id: Ibfb0eb8439225e03e72ed714570d8efac47188a0
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Diffstat (limited to 'mm/slab_common.c')
0 files changed, 0 insertions, 0 deletions