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| author | Andrey Konovalov <andreyknvl@gmail.com> | 2021-09-03 00:57:41 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-03 19:58:14 +0300 |
| commit | 1b0668be62cfa394903bb368641c80533bf42d5a (patch) | |
| tree | b06271e51fb3ff83e4ef07bfc9cb471b3c05d4be /lib | |
| parent | 555999a009aacd90ea51a6690e8eb2a5d0427edc (diff) | |
| download | linux-1b0668be62cfa394903bb368641c80533bf42d5a.tar.xz | |
kasan: test: disable kmalloc_memmove_invalid_size for HW_TAGS
The HW_TAGS mode doesn't check memmove for negative size. As a result,
the kmalloc_memmove_invalid_size test corrupts memory, which can result in
a crash.
Disable this test with HW_TAGS KASAN.
Link: https://lkml.kernel.org/r/088733a06ac21eba29aa85b6f769d2abd74f9638.1628779805.git.andreyknvl@gmail.com
Signed-off-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_kasan.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c index db73bc9e3fa2..1f533a7346d9 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -501,11 +501,17 @@ static void kmalloc_memmove_invalid_size(struct kunit *test) size_t size = 64; volatile size_t invalid_size = -2; + /* + * Hardware tag-based mode doesn't check memmove for negative size. + * As a result, this test introduces a side-effect memory corruption, + * which can result in a crash. + */ + KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_HW_TAGS); + ptr = kmalloc(size, GFP_KERNEL); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr); memset((char *)ptr, 0, 64); - KUNIT_EXPECT_KASAN_FAIL(test, memmove((char *)ptr, (char *)ptr + 4, invalid_size)); kfree(ptr); |