linux-kernel - [PATCH] selftests/memfd/memfd_test: Fix possible NULL pointer dereference

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Message-Id: <20250114032115.58638-1-liuye@kylinos.cn>
Date: Tue, 14 Jan 2025 11:21:15 +0800
From: liuye <liuye@...inos.cn>
To: shuah@...nel.org
Cc: akpm@...ux-foundation.org,
	jeffxu@...gle.com,
	isaacmanjarres@...gle.com,
	lorenzo.stoakes@...cle.com,
	gthelen@...gle.com,
	sauravshah.31@...il.com,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	liuye <liuye@...inos.cn>
Subject: [PATCH] selftests/memfd/memfd_test: Fix possible NULL pointer dereference

    If name is NULL, a NULL pointer may be accessed in printf.

Signed-off-by: liuye <liuye@...inos.cn>
---
 tools/testing/selftests/memfd/memfd_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index c0c53451a16d..5b993924cc3f 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -171,7 +171,7 @@ static void mfd_fail_new(const char *name, unsigned int flags)
 	r = sys_memfd_create(name, flags);
 	if (r >= 0) {
 		printf("memfd_create(\"%s\", %u) succeeded, but failure expected\n",
-		       name, flags);
+		       name ? name : "NULL", flags);
 		close(r);
 		abort();
 	}
-- 
2.25.1