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authorChenbo Feng <fengc@google.com>2017-06-20 19:06:40 -0700
committerDavid S. Miller <davem@davemloft.net>2017-06-22 11:13:56 -0400
commit8fac365f63c866a00015fa13932d8ffc584518b8 (patch)
treee8e8a7d3fdf70628d174f346c1bcf215b545f450 /net/ipv4/tcp_ipv4.c
parentnet: phy: smsc: fix buffer overflow in memcpy (diff)
downloadlinux-dev-8fac365f63c866a00015fa13932d8ffc584518b8.tar.xz
linux-dev-8fac365f63c866a00015fa13932d8ffc584518b8.zip
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 <fengc@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c2
1 files changed, 2 insertions, 0 deletions
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;