diff options
| author | Peter Collingbourne <pcc@google.com> | 2022-01-29 13:41:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-30 09:56:58 +0200 |
| commit | 27fe73394a1c6d0b07fa4d95f1bca116d1cc66e9 (patch) | |
| tree | 1667b65ac52ebb8bc51f6e9d9e9db259220f7fa5 /include/pcmcia | |
| parent | 09c6304e38e440b93a9ebf3f3cf75cd6cb529f91 (diff) | |
mm, kasan: use compare-exchange operation to set KASAN page tag
It has been reported that the tag setting operation on newly-allocated
pages can cause the page flags to be corrupted when performed
concurrently with other flag updates as a result of the use of
non-atomic operations.
Fix the problem by using a compare-exchange loop to update the tag.
Link: https://lkml.kernel.org/r/20220120020148.1632253-1-pcc@google.com
Link: https://linux-review.googlesource.com/id/I456b24a2b9067d93968d43b4bb3351c0cec63101
Fixes: 2813b9c02962 ("kasan, mm, arm64: tag non slab memory allocated via pagealloc")
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/pcmcia')
0 files changed, 0 insertions, 0 deletions