From: Geliang Tang <tanggeliang@kylinos.cn>
Date: Fri, 12 Sep 2025 16:36:48 +0000 (+0200)
Subject: selftests: mptcp: close server IPC descriptors
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e3241506a47175de74f65bc638e588b9f70dc105;p=users%2Fhch%2Fmisc.git

selftests: mptcp: close server IPC descriptors

The client-side function connect_one_server() properly closes its IPC
descriptor after use, but the server-side code in both mptcp_sockopt.c
and mptcp_inq.c was missing corresponding close() calls for their IPC
descriptors, leaving file descriptors open unnecessarily.

This change ensures proper cleanup by:
1. Adding missing close(pipefds[0]/unixfds[0]) in server processes
2. Adding close(pipefds[1]/unixfds[1]) after server() function calls

This ensures both ends of the IPC pipe are properly closed in their
respective processes, preventing file descriptor leaks.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250912-net-next-mptcp-minor-fixes-6-18-v1-2-99d179b483ad@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/tools/testing/selftests/net/mptcp/mptcp_inq.c b/tools/testing/selftests/net/mptcp/mptcp_inq.c
index 40f2a1b24763..8e8f6441ad8b 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_inq.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_inq.c
@@ -581,8 +581,12 @@ int main(int argc, char *argv[])
 		die_perror("pipe");
 
 	s = xfork();
-	if (s == 0)
-		return server(unixfds[1]);
+	if (s == 0) {
+		close(unixfds[0]);
+		ret = server(unixfds[1]);
+		close(unixfds[1]);
+		return ret;
+	}
 
 	close(unixfds[1]);
 
diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
index b44b6c9b0550..e9c359df9416 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c
@@ -848,8 +848,12 @@ int main(int argc, char *argv[])
 		die_perror("pipe");
 
 	s = xfork();
-	if (s == 0)
-		return server(pipefds[1]);
+	if (s == 0) {
+		close(pipefds[0]);
+		ret = server(pipefds[1]);
+		close(pipefds[1]);
+		return ret;
+	}
 
 	close(pipefds[1]);