linux-kernel - [PATCH 2/2] kasan: test: add test case for double-kmem_cache

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Date:   Fri, 19 Nov 2021 15:22:19 +0100
From:   Marco Elver <elver@...gle.com>
To:     elver@...gle.com, Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Vlastimil Babka <vbabka@...e.cz>, kasan-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 2/2] kasan: test: add test case for double-kmem_cache_destroy()

Add a test case for double-kmem_cache_destroy() detection.

Signed-off-by: Marco Elver <elver@...gle.com>
---
 lib/test_kasan.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 40f7274297c1..4da4b214ed06 100644
--- 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;
@@ -1183,6 +1193,7 @@ 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),
-- 
2.34.0.rc2.393.gf8c9666880-goog