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mptcp: pm: send ACK on an active subflow

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commit c07cc3ed89 upstream.

Taking the first one on the list doesn't work in some cases, e.g. if the
initial subflow is being removed. Pick another one instead of not
sending anything.

Fixes: 84dfe3677a ("mptcp: send out dedicated ADD_ADDR packet")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthieu Baerts (NGI0) 2024-08-28 08:14:27 +02:00 committed by Greg Kroah-Hartman
parent 26e0f27405
commit edfbc14a4b
1 changed files with 6 additions and 3 deletions
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9
net/mptcp/pm_netlink.c
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@ -776,9 +776,12 @@ void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk)
!mptcp_pm_should_rm_signal(msk))
return;
subflow = list_first_entry_or_null(&msk->conn_list, typeof(*subflow), node);
if (subflow)
mptcp_pm_send_ack(msk, subflow, false, false);
mptcp_for_each_subflow(msk, subflow) {
if (__mptcp_subflow_active(subflow)) {
mptcp_pm_send_ack(msk, subflow, false, false);
break;
}
}
}
int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,