[PATCH 5/6] selftests/nolibc: disable ubsan for smash_stack()

From: Thomas Weißschuh
Date: Wed Apr 16 2025 - 14:41:56 EST


smash_stack() intentionally crashes.

Prevent UBSAN from tripping over it.

Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
tools/testing/selftests/nolibc/nolibc-test.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 7a60b6ac1457e8d862ab1a6a26c9e46abec92111..b176a706609b7641dd1d743c8a02b6b6e7a4c746 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -1438,6 +1438,7 @@ static int run_vfprintf(int min, int max)
return ret;
}

+__attribute__((no_sanitize("undefined")))
static int smash_stack(void)
{
char buf[100];

--
2.49.0