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kmsan: add memsetXX tests 

Add tests ensuring that memset16()/memset32()/memset64() are instrumented
by KMSAN and correctly initialize the memory.

Link: https://lkml.kernel.org/r/20230303141433.3422671-4-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Alexander Potapenko 2023-03-03 15:14:33 +01:00 committed by Andrew Morton
parent 27f644dc5a
commit 78c74aeee5
1 changed files with 22 additions and 0 deletions
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22
mm/kmsan/kmsan_test.c
View File

@ -504,6 +504,25 @@ static void test_memcpy_aligned_to_unaligned2(struct kunit *test)
KUNIT_EXPECT_TRUE(test, report_matches(&expect));
}
/* Generate test cases for memset16(), memset32(), memset64(). */
#define DEFINE_TEST_MEMSETXX(size) \
static void test_memset##size(struct kunit *test) \
{ \
EXPECTATION_NO_REPORT(expect); \
volatile uint##size##_t uninit; \
\
kunit_info(test, \
"memset" #size "() should initialize memory\n"); \
DO_NOT_OPTIMIZE(uninit); \
memset##size((uint##size##_t *)&uninit, 0, 1); \
kmsan_check_memory((void *)&uninit, sizeof(uninit)); \
KUNIT_EXPECT_TRUE(test, report_matches(&expect)); \
}
DEFINE_TEST_MEMSETXX(16)
DEFINE_TEST_MEMSETXX(32)
DEFINE_TEST_MEMSETXX(64)
static noinline void fibonacci(int *array, int size, int start)
{
if (start < 2 || (start == size))
@ -550,6 +569,9 @@ static struct kunit_case kmsan_test_cases[] = {
KUNIT_CASE(test_memcpy_aligned_to_aligned),
KUNIT_CASE(test_memcpy_aligned_to_unaligned),
KUNIT_CASE(test_memcpy_aligned_to_unaligned2),
KUNIT_CASE(test_memset16),
KUNIT_CASE(test_memset32),
KUNIT_CASE(test_memset64),
KUNIT_CASE(test_long_origin_chain),
{},
};