Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8fac365f authored by Chenbo Feng's avatar Chenbo Feng Committed by David S. Miller
Browse files

tcp: Add a tcp_filter hook before handle ack packet 



Currently in both ipv4 and ipv6 code path, the ack packet received when
sk at TCP_NEW_SYN_RECV state is not filtered by socket filter or cgroup
filter since it is handled from tcp_child_process and never reaches the
tcp_filter inside tcp_v4_rcv or tcp_v6_rcv. Adding a tcp_filter hooks
here can make sure all the ingress tcp packet can be correctly filtered.

Signed-off-by: default avatarChenbo Feng <fengc@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2da55390

net/ipv4/tcp_ipv4.c

+2 −0
Original line number Diff line number Diff line
@@ -1729,6 +1729,8 @@ int tcp_v4_rcv(struct sk_buff *skb) 
		}

		if (nsk == sk) {

			reqsk_put(req);

		} else if (tcp_filter(sk, skb)) {

			goto discard_and_relse;

		} else if (tcp_child_process(sk, nsk, skb)) {

			tcp_v4_send_reset(nsk, skb);

			goto discard_and_relse;

net/ipv6/tcp_ipv6.c

+2 −0
Original line number Diff line number Diff line
@@ -1464,6 +1464,8 @@ static int tcp_v6_rcv(struct sk_buff *skb) 
		if (nsk == sk) {

			reqsk_put(req);

			tcp_v6_restore_cb(skb);

		} else if (tcp_filter(sk, skb)) {

			goto discard_and_relse;

		} else if (tcp_child_process(sk, nsk, skb)) {

			tcp_v6_send_reset(nsk, skb);

			goto discard_and_relse;