[PATCH net-next 7/8] mptcp: backup flag from incoming MPJ ack option
From: Mat Martineau <hidden>
Date: 2021-08-13 22:16:19
Also in:
mptcp
Subsystem:
networking [general], networking [mptcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Matthieu Baerts, Mat Martineau, Linus Torvalds
From: Paolo Abeni <pabeni@redhat.com> the parsed incoming backup flag is not propagated to the subflow itself, the client may end-up using it to send data. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/191 Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <redacted> --- net/mptcp/subflow.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 966f777d35ce..1151926d335b 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c@@ -435,10 +435,12 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) goto do_reset; } + subflow->backup = mp_opt.backup; subflow->thmac = mp_opt.thmac; subflow->remote_nonce = mp_opt.nonce; - pr_debug("subflow=%p, thmac=%llu, remote_nonce=%u", subflow, - subflow->thmac, subflow->remote_nonce); + pr_debug("subflow=%p, thmac=%llu, remote_nonce=%u backup=%d", + subflow, subflow->thmac, subflow->remote_nonce, + subflow->backup); if (!subflow_thmac_valid(subflow)) { MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_JOINACKMAC);
--
2.32.0