diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2023-12-19 23:28:56 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-29 20:58:39 +0100 |
| commit | 29d7355a9d05de9a6e38cc4d1146fb96c43853fb (patch) | |
| tree | 298b492f9270c8fadd84f13c49a23174572c51fe /include | |
| parent | kasan: introduce poison_kmalloc_large_redzone (diff) | |
| download | linux-29d7355a9d05de9a6e38cc4d1146fb96c43853fb.tar.xz linux-29d7355a9d05de9a6e38cc4d1146fb96c43853fb.zip | |
kasan: save alloc stack traces for mempool
Update kasan_mempool_unpoison_object to properly poison the redzone and
save alloc strack traces for kmalloc and slab pools.
As a part of this change, split out and use a unpoison_slab_object helper
function from __kasan_slab_alloc.
[nathan@kernel.org: mark unpoison_slab_object() as static]
Link: https://lkml.kernel.org/r/20231221180042.104694-1-andrey.konovalov@linux.dev
Link: https://lkml.kernel.org/r/05ad235da8347cfe14d496d01b2aaf074b4f607c.1703024586.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Cc: Alexander Lobakin <alobakin@pm.me>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kasan.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h index e636a00e26ba..7392c5d89b92 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -303,9 +303,10 @@ void __kasan_mempool_unpoison_object(void *ptr, size_t size, unsigned long ip); * mempool). * * This function unpoisons a slab allocation that was previously poisoned via - * kasan_mempool_poison_object() without initializing its memory. For the - * tag-based modes, this function does not assign a new tag to the allocation - * and instead restores the original tags based on the pointer value. + * kasan_mempool_poison_object() and saves an alloc stack trace for it without + * initializing the allocation's memory. For the tag-based modes, this function + * does not assign a new tag to the allocation and instead restores the + * original tags based on the pointer value. * * This function operates on all slab allocations including large kmalloc * allocations (the ones returned by kmalloc_large() or by kmalloc() with the |