[patch 038/146] kasan: test: add test case for double-kmem_cache_destroy()

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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),
_



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