linux-kernel - [PATCH] bpf, selftests: fix a resource leak in main()

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Message-Id: <20240711074437.2283810-1-make24@iscas.ac.cn>
Date: Thu, 11 Jul 2024 15:44:37 +0800
From: Ma Ke <make24@...as.ac.cn>
To: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	mykolal@...com,
	shuah@...nel.org
Cc: bpf@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make24@...as.ac.cn>
Subject: [PATCH] bpf, selftests: fix a resource leak in main()

The requested resources should be closed before return in main(), otherwise
resource leak will occur. Add a check of cgroup_fd and close().

Fixes: 4939b2847d26 ("bpf, selftests: Use single cgroup helpers for both test_sockmap/progs")
Signed-off-by: Ma Ke <make24@...as.ac.cn>
---
 tools/testing/selftests/bpf/test_dev_cgroup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_dev_cgroup.c b/tools/testing/selftests/bpf/test_dev_cgroup.c
index adeaf63cb6fa..e97fc061fab2 100644
--- a/tools/testing/selftests/bpf/test_dev_cgroup.c
+++ b/tools/testing/selftests/bpf/test_dev_cgroup.c
@@ -81,5 +81,7 @@ int main(int argc, char **argv)
 	cleanup_cgroup_environment();
 
 out:
+	if (cgroup_fd >= 0)
+		close(cgroup_fd);
 	return error;
 }
-- 
2.25.1