[PATCH net 09/11] mptcp: pm: prio: skip closed subflows
From: "Matthieu Baerts (NGI0)" <matttbe@kernel.org>
Date: 2026-05-05 15:01:48
Also in:
lkml, mptcp, stable
Subsystem:
networking [general], networking [mptcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Matthieu Baerts, Mat Martineau, Linus Torvalds
When sending an MP_PRIO, closed subflows need to be skipped.
This fixes the case where the initial subflow got closed, re-opened
later, then an MP_PRIO is needed for the same local address.
Note that explicit MP_PRIO cannot be sent during the 3WHS, so it is fine
to use __mptcp_subflow_active().
Fixes: 067065422fcd ("mptcp: add the outgoing MP_PRIO support")
Cc: stable@vger.kernel.org
Fixes: b29fcfb54cd7 ("mptcp: full disconnect implementation")
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
net/mptcp/pm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 4a6e5ab30d80..3c152bf66cd5 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c@@ -284,6 +284,9 @@ int mptcp_pm_mp_prio_send_ack(struct mptcp_sock *msk, struct sock *ssk = mptcp_subflow_tcp_sock(subflow); struct mptcp_addr_info local, remote; + if (!__mptcp_subflow_active(subflow)) + continue; + mptcp_local_address((struct sock_common *)ssk, &local); if (!mptcp_addresses_equal(&local, addr, addr->port)) continue;
--
2.53.0