From 8fac365f63c866a00015fa13932d8ffc584518b8 Mon Sep 17 00:00:00 2001 From: Chenbo Feng Date: Tue, 20 Jun 2017 19:06:40 -0700 Subject: 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: Chenbo Feng Signed-off-by: David S. Miller --- net/ipv4/tcp_ipv4.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/ipv4/tcp_ipv4.c') diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index e20bcf0061af..d774bcd9a54b 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1729,6 +1729,8 @@ process: } 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; -- cgit v1.2.3-59-g8ed1b