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Subject[PATCH mm 21/21] io_uring: use mempool KASAN hook
Date
From: Andrey Konovalov <andreyknvl@google.com>

Use the proper kasan_mempool_unpoison_object hook for unpoisoning cached
objects.

A future change might also update io_uring to check the return value of
kasan_mempool_poison_object to prevent double-free and invalid-free bugs.
This proves to be non-trivial with the current way io_uring caches
objects, so this is left out-of-scope of this series.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
io_uring/alloc_cache.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/alloc_cache.h b/io_uring/alloc_cache.h
index 8de0414e8efe..bf2fb26a6539 100644
--- a/io_uring/alloc_cache.h
+++ b/io_uring/alloc_cache.h
@@ -33,7 +33,7 @@ static inline struct io_cache_entry *io_alloc_cache_get(struct io_alloc_cache *c
struct io_cache_entry *entry;

entry = container_of(cache->list.next, struct io_cache_entry, node);
- kasan_unpoison_range(entry, cache->elem_size);
+ kasan_mempool_unpoison_object(entry, cache->elem_size);
cache->list.next = cache->list.next->next;
cache->nr_cached--;
return entry;
--
2.25.1

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