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

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Message-Id: <20240711071018.2197252-1-make24@iscas.ac.cn>
Date: Thu, 11 Jul 2024 15:10:18 +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,
	sowmini.varadhan@...cle.com
Cc: bpf@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make24@...as.ac.cn>
Subject: [PATCH] selftests/bpf: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 cg_fd before close().

Fixes: 435f90a338ae ("selftests/bpf: add a test case for sock_ops perf-event notification")
Signed-off-by: Ma Ke <make24@...as.ac.cn>
---
 tools/testing/selftests/bpf/test_tcpnotify_user.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_tcpnotify_user.c b/tools/testing/selftests/bpf/test_tcpnotify_user.c
index 595194453ff8..f81c60db586e 100644
--- a/tools/testing/selftests/bpf/test_tcpnotify_user.c
+++ b/tools/testing/selftests/bpf/test_tcpnotify_user.c
@@ -161,7 +161,8 @@ int main(int argc, char **argv)
 	error = 0;
 err:
 	bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
-	close(cg_fd);
+	if (cg_fd >= 0)
+		close(cg_fd);
 	cleanup_cgroup_environment();
 	perf_buffer__free(pb);
 	return error;
-- 
2.25.1