--- /dev/null
+From 629b35a225b0d49fbcff3b5c22e3b983c7c7b36f Mon Sep 17 00:00:00 2001
+From: Geliang Tang <geliang.tang@suse.com>
+Date: Wed, 25 Oct 2023 16:37:11 -0700
+Subject: selftests: mptcp: display simult in extra_msg
+
+From: Geliang Tang <geliang.tang@suse.com>
+
+commit 629b35a225b0d49fbcff3b5c22e3b983c7c7b36f upstream.
+
+Just like displaying "invert" after "Info: ", "simult" should be
+displayed too when rm_subflow_nr doesn't match the expect value in
+chk_rm_nr():
+
+ syn [ ok ]
+ synack [ ok ]
+ ack [ ok ]
+ add [ ok ]
+ echo [ ok ]
+ rm [ ok ]
+ rmsf [ ok ] 3 in [2:4]
+ Info: invert simult
+
+ syn [ ok ]
+ synack [ ok ]
+ ack [ ok ]
+ add [ ok ]
+ echo [ ok ]
+ rm [ ok ]
+ rmsf [ ok ]
+ Info: invert
+
+Reviewed-by: Matthieu Baerts <matttbe@kernel.org>
+Signed-off-by: Geliang Tang <geliang.tang@suse.com>
+Signed-off-by: Mat Martineau <martineau@kernel.org>
+Link: https://lore.kernel.org/r/20231025-send-net-next-20231025-v1-10-db8f25f798eb@kernel.org
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ tools/testing/selftests/net/mptcp/mptcp_join.sh | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
++++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
+@@ -1740,7 +1740,10 @@ chk_rm_nr()
+ # in case of simult flush, the subflow removal count on each side is
+ # unreliable
+ count=$((count + cnt))
+- [ "$count" != "$rm_subflow_nr" ] && suffix="$count in [$rm_subflow_nr:$((rm_subflow_nr*2))]"
++ if [ "$count" != "$rm_subflow_nr" ]; then
++ suffix="$count in [$rm_subflow_nr:$((rm_subflow_nr*2))]"
++ extra_msg="$extra_msg simult"
++ fi
+ if [ $count -ge "$rm_subflow_nr" ] && \
+ [ "$count" -le "$((rm_subflow_nr *2 ))" ]; then
+ print_ok "$suffix"