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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-02 14:44:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-02 14:44:15 +0300 |
| commit | 2844b98acb6112cf1eb7a16bbdc7fe9b319c17d4 (patch) | |
| tree | dca5ec4aeb4edeb0cbe0e04a4b24f7cc91f7a2e1 /mm/kmsan/kmsan_test.c | |
| parent | 56fb05093756ed55ba1cdf5d432a68004da67860 (diff) | |
| parent | 72b82d56b82137a92a20e5584029d35408d810c2 (diff) | |
| download | linux-rolling-lts.tar.xz | |
Merge v6.12.50linux-rolling-lts
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/kmsan/kmsan_test.c')
| -rw-r--r-- | mm/kmsan/kmsan_test.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/mm/kmsan/kmsan_test.c b/mm/kmsan/kmsan_test.c index 13236d579eba..c95a8e72e496 100644 --- a/mm/kmsan/kmsan_test.c +++ b/mm/kmsan/kmsan_test.c @@ -556,6 +556,21 @@ DEFINE_TEST_MEMSETXX(16) DEFINE_TEST_MEMSETXX(32) DEFINE_TEST_MEMSETXX(64) +/* Test case: ensure that KMSAN does not access shadow memory out of bounds. */ +static void test_memset_on_guarded_buffer(struct kunit *test) +{ + void *buf = vmalloc(PAGE_SIZE); + + kunit_info(test, + "memset() on ends of guarded buffer should not crash\n"); + + for (size_t size = 0; size <= 128; size++) { + memset(buf, 0xff, size); + memset(buf + PAGE_SIZE - size, 0xff, size); + } + vfree(buf); +} + static noinline void fibonacci(int *array, int size, int start) { if (start < 2 || (start == size)) @@ -661,6 +676,7 @@ static struct kunit_case kmsan_test_cases[] = { KUNIT_CASE(test_memset16), KUNIT_CASE(test_memset32), KUNIT_CASE(test_memset64), + KUNIT_CASE(test_memset_on_guarded_buffer), KUNIT_CASE(test_long_origin_chain), KUNIT_CASE(test_stackdepot_roundtrip), KUNIT_CASE(test_unpoison_memory), |