From: Marco Elver <elver@xxxxxxxxxx> Subject: kasan: test: add test case for double-kmem_cache_destroy() Add a test case for double-kmem_cache_destroy() detection. Link: https://lkml.kernel.org/r/20211119142219.1519617-2-elver@xxxxxxxxxx Signed-off-by: Marco Elver <elver@xxxxxxxxxx> Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxx> Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/test_kasan.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/lib/test_kasan.c~kasan-test-add-test-case-for-double-kmem_cache_destroy +++ a/lib/test_kasan.c @@ -866,6 +866,16 @@ static void kmem_cache_invalid_free(stru kmem_cache_destroy(cache); } +static void kmem_cache_double_destroy(struct kunit *test) +{ + struct kmem_cache *cache; + + cache = kmem_cache_create("test_cache", 200, 0, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache); + kmem_cache_destroy(cache); + KUNIT_EXPECT_KASAN_FAIL(test, kmem_cache_destroy(cache)); +} + static void kasan_memchr(struct kunit *test) { char *ptr; @@ -1185,6 +1195,7 @@ static struct kunit_case kasan_kunit_tes KUNIT_CASE(ksize_uaf), KUNIT_CASE(kmem_cache_double_free), KUNIT_CASE(kmem_cache_invalid_free), + KUNIT_CASE(kmem_cache_double_destroy), KUNIT_CASE(kasan_memchr), KUNIT_CASE(kasan_memcmp), KUNIT_CASE(kasan_strings), _
