Commit 166b78344031 for kernel

commit 166b78344031bf7ac9f55cb5282776cfd85f220e
Author: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Date:   Tue May 5 17:00:57 2026 +0200

    mptcp: pm: prio: skip closed subflows

    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>
    Link: https://patch.msgid.link/20260505-net-mptcp-pm-fixes-7-1-rc3-v1-9-fca8091060a4@kernel.org
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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;