From c20121ae87955cfc8b51f89072294fc6077f39ad Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 5 Mar 2008 10:48:35 -0800 Subject: [PATCH] [NETNS][IPV6] route6 - pass always a valid socket to ip6_dst_lookup The ip6_dst_lookup receive a socket as parameter. In some part of the code it is called with a NULL socket parameter. We want to rely on the socket to retrieve the network namespace, so we always pass a valid socket in all cases. Signed-off-by: Daniel Lezcano Signed-off-by: Benjamin Thery Signed-off-by: David S. Miller --- net/ipv6/ip6_output.c | 4 ++-- net/ipv6/tcp_ipv6.c | 9 ++++++--- 2 files changed, 8 insertions(+), 5 deletions(-) diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 161afd1142d0..937018529d18 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -913,7 +913,7 @@ static int ip6_dst_lookup_tail(struct sock *sk, int err; if (*dst == NULL) - *dst = ip6_route_output(&init_net, sk, fl); + *dst = ip6_route_output(sk->sk_net, sk, fl); if ((err = (*dst)->error)) goto out_err_release; @@ -954,7 +954,7 @@ static int ip6_dst_lookup_tail(struct sock *sk, dst_release(*dst); memcpy(&fl_gw, fl, sizeof(struct flowi)); memset(&fl_gw.fl6_dst, 0, sizeof(struct in6_addr)); - *dst = ip6_route_output(&init_net, sk, &fl_gw); + *dst = ip6_route_output(sk->sk_net, sk, &fl_gw); if ((err = (*dst)->error)) goto out_err_release; } diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index fd773ac7531a..aacbb7688bf9 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1071,8 +1071,11 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb) fl.fl_ip_sport = t1->source; security_skb_classify_flow(skb, &fl); - /* sk = NULL, but it is safe for now. RST socket required. */ - if (!ip6_dst_lookup(NULL, &buff->dst, &fl)) { + /* Pass a socket to ip6_dst_lookup either it is for RST + * Underlying function will use this to retrieve the network + * namespace + */ + if (!ip6_dst_lookup(tcp6_socket->sk, &buff->dst, &fl)) { if (xfrm_lookup(&buff->dst, &fl, NULL, 0) >= 0) { ip6_xmit(tcp6_socket->sk, buff, &fl, NULL, 0); @@ -1172,7 +1175,7 @@ static void tcp_v6_send_ack(struct tcp_timewait_sock *tw, fl.fl_ip_sport = t1->source; security_skb_classify_flow(skb, &fl); - if (!ip6_dst_lookup(NULL, &buff->dst, &fl)) { + if (!ip6_dst_lookup(tcp6_socket->sk, &buff->dst, &fl)) { if (xfrm_lookup(&buff->dst, &fl, NULL, 0) >= 0) { ip6_xmit(tcp6_socket->sk, buff, &fl, NULL, 0); TCP_INC_STATS_BH(TCP_MIB_OUTSEGS); -- 2.20.1