From: Paolo Abeni <pabeni@redhat.com>
Date: Thu, 30 Apr 2020 13:01:55 +0000 (+0200)
Subject: mptcp: initialize the data_fin field for mpc packets
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a77895dbc0ad0400e377e8f26567820b3658e30e;p=linux.git

mptcp: initialize the data_fin field for mpc packets

When parsing MPC+data packets we set the dss field, so
we must also initialize the data_fin, or we can find stray
value there.

Fixes: 9a19371bf029 ("mptcp: fix data_fin handing in RX path")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 9486720c32566..45497af23906c 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -858,6 +858,7 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb,
 			mpext->subflow_seq = 1;
 			mpext->dsn64 = 1;
 			mpext->mpc_map = 1;
+			mpext->data_fin = 0;
 		} else {
 			mpext->data_seq = mp_opt.data_seq;
 			mpext->subflow_seq = mp_opt.subflow_seq;