linux-kernel - [PATCH net-next 1/3] selftests: mptcp: close server file descriptors

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Message-Id: <20250912-net-next-mptcp-minor-fixes-6-18-v1-1-99d179b483ad@kernel.org>
Date: Fri, 12 Sep 2025 18:36:47 +0200
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: Mat Martineau <martineau@...nel.org>, Geliang Tang <geliang@...nel.org>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org, mptcp@...ts.linux.dev, 
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>, 
 Geliang Tang <geliang@...nel.org>
Subject: [PATCH net-next 1/3] selftests: mptcp: close server file
 descriptors

From: Geliang Tang <tanggeliang@...inos.cn>

The server file descriptor ('fd') is opened in server() but never closed.
While accepted connections are properly closed in process_one_client(),
the main listening socket remains open, causing a resource leak.

This patch ensures the server fd is properly closed after processing
clients, bringing the sockopt and inq test cases in line with proper
resource cleanup practices.

Reviewed-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
Signed-off-by: Geliang Tang <tanggeliang@...inos.cn>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
 tools/testing/selftests/net/mptcp/mptcp_inq.c     | 1 +
 tools/testing/selftests/net/mptcp/mptcp_sockopt.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
index f3bcaa48df8f22e8f4833fcc3b919d21764bf7fb..40f2a1b24763e3b84e12bfae7b893c35e6c2af71 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
@@ -502,6 +502,7 @@ static int server(int unixfd)

 	process_one_client(r, unixfd);

+	close(fd);
 	return 0;
 }

diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
index e934dd26a59d9b50445d61e8b8013ce3c8d2a8a0..b44b6c9b05507780fa85221e61813182cf7c082e 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
@@ -722,6 +722,7 @@ static int server(int pipefd)

 	process_one_client(r, pipefd);

+	close(fd);
 	return 0;
 }

-- 
2.51.0