linux-kernel - [PATCH 5/6] selftests/nolibc: disable ubsan for smash

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Message-Id: <20250416-nolibc-ubsan-v1-5-c4704bb23da7@weissschuh.net>
Date: Wed, 16 Apr 2025 20:40:20 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Willy Tarreau <w@....eu>, "Paul E. McKenney" <paulmck@...nel.org>, 
 Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 5/6] selftests/nolibc: disable ubsan for smash_stack()

smash_stack() intentionally crashes.

Prevent UBSAN from tripping over it.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 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