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| author |   Marco Elver <elver@google.com> | 2019-07-11 20:54:11 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-12 11:05:42 -0700 |
| commit | bb104ed78552147bed3a981fdada622afd2084b6 (patch) | |
| tree | 78a8a7389d65e4bbb32b8df7eddd77cd3cb2cfb8 /lib/test_kasan.c | |
| parent | mm/kasan: change kasan_check_{read,write} to return boolean (diff) | |
| download | linux-dev-bb104ed78552147bed3a981fdada622afd2084b6.tar.xz linux-dev-bb104ed78552147bed3a981fdada622afd2084b6.zip | |
lib/test_kasan: Add test for double-kzfree detection
Add a simple test that checks if double-kzfree is being detected
correctly.
Link: http://lkml.kernel.org/r/20190626142014.141844-4-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@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: Mark Rutland <mark.rutland@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_kasan.c')
| -rw-r--r-- | lib/test_kasan.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c index d85f25c65b0a..b63b367a94e8 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -693,6 +693,22 @@ static noinline void __init kasan_bitops(void) kfree(bits); } +static noinline void __init kmalloc_double_kzfree(void) +{ + char *ptr; + size_t size = 16; + + pr_info("double-free (kzfree)\n"); + ptr = kmalloc(size, GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + kzfree(ptr); + kzfree(ptr); +} + static int __init kmalloc_tests_init(void) { /* @@ -735,6 +751,7 @@ static int __init kmalloc_tests_init(void) kasan_memcmp(); kasan_strings(); kasan_bitops(); + kmalloc_double_kzfree(); kasan_restore_multi_shot(multishot); |