[PATCH] kasan: disable kasan_strings() kunit test when CONFIG_FORTIFY_SOURCE enabled

[Yeoreum Yun <yeoreum.yun@arm.com>]

When CONFIG_FORTIFY_SOURCE is enabled, invalid access from source
triggers __fortify_panic() which kills running task.

This makes failured of kasan_strings() kunit testcase since the
kunit-try-cacth kthread running kasan_string() dies before checking the
fault.

To address this, skip kasan_strings() kunit test when
CONFIG_FORTIFY_SOURCE is enabled.

Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
---
 mm/kasan/kasan_test_c.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mm/kasan/kasan_test_c.c b/mm/kasan/kasan_test_c.c
index 5f922dd38ffa..1577d3edabb4 100644
--- a/mm/kasan/kasan_test_c.c
+++ b/mm/kasan/kasan_test_c.c
@@ -1576,6 +1576,12 @@ static void kasan_strings(struct kunit *test)
 	 */
 	KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_AMD_MEM_ENCRYPT);

+	/*
+	 * Harden common str/mem functions kills the kunit-try-catch thread
+	 * before checking the fault.
+	 */
+	KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_FORTIFY_SOURCE);
+
 	ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);

--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}