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kasan: save free stack traces for slab mempools

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Make kasan_mempool_poison_object save free stack traces for slab and
kmalloc mempools when the object is freed into the mempool.

Also simplify and rename ____kasan_slab_free to poison_slab_object and do
a few other reability changes.

Link: https://lkml.kernel.org/r/413a7c7c3344fb56809853339ffaabc9e4905e94.1703024586.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
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>
This commit is contained in:
Andrey Konovalov
2023-12-19 23:28:53 +01:00
committed by Andrew Morton
parent cf0da2afe3
commit b556a462eb
2 changed files with 12 additions and 13 deletions
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5
include/linux/kasan.h
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@@ -268,8 +268,9 @@ bool __kasan_mempool_poison_object(void *ptr, unsigned long ip);
* to reuse them instead of freeing them back to the slab allocator (e.g.
* mempool).
*
* This function poisons a slab allocation without initializing its memory and
* without putting it into the quarantine (for the Generic mode).
* This function poisons a slab allocation and saves a free stack trace for it
* without initializing the allocation's memory and without putting it into the
* quarantine (for the Generic mode).
*
* This function also performs checks to detect double-free and invalid-free
* bugs and reports them. The caller can use the return value of this function