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Message-ID: <CA+fCnZdKLrniF4ru8G5=hkm4M6YYm3RJz6wFcNqD2hPC8Trj-g@mail.gmail.com>
Date: Fri, 19 Nov 2021 15:36:06 +0100
From: Andrey Konovalov <andreyknvl@...il.com>
To: Marco Elver <elver@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Andrey Ryabinin <ryabinin.a.a@...il.com>,
Alexander Potapenko <glider@...gle.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 <kasan-dev@...glegroups.com>,
LKML <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [PATCH 2/2] kasan: test: add test case for double-kmem_cache_destroy()
On Fri, Nov 19, 2021 at 3:22 PM Marco Elver <elver@...gle.com> wrote:
>
> 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
>
Reviewed-by: Andrey Konovalov <andreyknvl@...il.com>
Thanks!
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