[PATCH v2 6/8] kasan: test: clean up ksize_uaf
From: andrey . konovalov
Date: Thu Aug 12 2021 - 10:56:47 EST
From: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Some KASAN tests use global variables to store function returns values
so that the compiler doesn't optimize away these functions.
ksize_uaf() doesn't call any functions, so it doesn't need to use
kasan_int_result. Use volatile accesses instead, to be consistent with
other similar tests.
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
---
lib/test_kasan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 1dcba6dbfc97..30f2cde96e81 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -737,8 +737,8 @@ static void ksize_uaf(struct kunit *test)
kfree(ptr);
KUNIT_EXPECT_KASAN_FAIL(test, ksize(ptr));
- KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = *ptr);
- KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = *(ptr + size));
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[0]);
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[size]);
}
static void kasan_stack_oob(struct kunit *test)
--
2.25.1