From: Thomas Weißschuh <linux@weissschuh.net>
Date: Sat, 19 Apr 2025 10:46:23 +0000 (+0200)
Subject: selftests/nolibc: disable ubsan for smash_stack()
X-Git-Tag: v6.16-rc1~175^2~71
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6478251f95121ae4b66e987c98482e0d0b149e5d;p=thirdparty%2Fkernel%2Flinux.git

selftests/nolibc: disable ubsan for smash_stack()

smash_stack() intentionally crashes.

Prevent UBSAN from tripping over it.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250419-nolibc-ubsan-v2-6-060b8a016917@weissschuh.net
---

diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 7a60b6ac1457e..b176a706609b7 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];