From: Herbert Xu Date: Sat, 27 Jun 2009 02:22:37 +0000 (-0700) Subject: inet: Call skb_orphan before tproxy activates X-Git-Tag: firefly_0821_release~13027^2~267 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=71f9dacd2e4d233029e9e956ca3f79531f411827;p=firefly-linux-kernel-4.4.55.git inet: Call skb_orphan before tproxy activates As transparent proxying looks up the socket early and assigns it to the skb for later processing, we must drop any existing socket ownership prior to that in order to distinguish between the case where tproxy is active and where it is not. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 490ce20faf38..db46b4b5b2b9 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -440,6 +440,9 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, /* Remove any debris in the socket control block */ memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); + /* Must drop socket now because of tproxy. */ + skb_orphan(skb); + return NF_HOOK(PF_INET, NF_INET_PRE_ROUTING, skb, dev, NULL, ip_rcv_finish); diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index c3a07d75b5f5..6d6a4277c677 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -139,6 +139,9 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt rcu_read_unlock(); + /* Must drop socket now because of tproxy. */ + skb_orphan(skb); + return NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, dev, NULL, ip6_rcv_finish); err: