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@google.com
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 818e763..847cdbe 100644 (file)
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -866,6 +866,16 @@ static void kmem_cache_invalid_free(struct kunit *test)
        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_test_cases[] = {
        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),