Commit e3213292c4fd for kernel

commit e3213292c4fd69ba442c6ed4693f91a92b753140
Author: Geliang Tang <geliang@kernel.org>
Date:   Wed Jul 22 00:14:41 2026 +0200

    selftests: mptcp: userspace_pm: fix undefined variable port

    In make_connection(), the variable "port" is used but never defined.
    This leads to an empty argument being passed to wait_local_port_listen(),
    causing "printf: : invalid number" errors:

     # INFO: Init
     # 01 Created network namespaces ns1, ns2                          [ OK ]
     # INFO: Make connections
     # ./../lib.sh: line 651: printf: : invalid number
     # 02 Established IPv4 MPTCP Connection ns2 => ns1                 [ OK ]
     # INFO: Connection info: 10.0.1.2:59516 -> 10.0.1.1:50002
     # ./../lib.sh: line 651: printf: : invalid number
     # 03 Established IPv6 MPTCP Connection ns2 => ns1                 [ OK ]

    Fix it by using the correctly defined variable "app_port", which holds the
    appropriate port number for the connection.

    Fixes: 39348f5f2f13 ("selftests: mptcp: wait for port instead of sleep")
    Cc: stable@vger.kernel.org
    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/20260722-net-mptcp-misc-fixes-7-2-rc5-v1-4-6fb595bc86ef@kernel.org
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/mptcp/userspace_pm.sh b/tools/testing/selftests/net/mptcp/userspace_pm.sh
index e9ae1806ab07..30a809752d1b 100755
--- a/tools/testing/selftests/net/mptcp/userspace_pm.sh
+++ b/tools/testing/selftests/net/mptcp/userspace_pm.sh
@@ -212,7 +212,7 @@ make_connection()
 	   ./mptcp_connect -s MPTCP -w 300 -p $app_port -l $listen_addr > /dev/null 2>&1 &
 	local server_pid=$!

-	mptcp_lib_wait_local_port_listen "${ns1}" "${port}"
+	mptcp_lib_wait_local_port_listen "${ns1}" "${app_port}"

 	# Run the client, transfer $file and stay connected to the server
 	# to conduct tests