diff options
| author | Pravin B Shelar <pshelar@nicira.com> | 2014-03-23 22:06:36 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-26 15:18:40 -0400 |
| commit | fbd02dd405d0724a0f25897ed4a6813297c9b96f (patch) | |
| tree | 4ebae2c7d156ffa99c1c6ec2d14a8061d0a7b742 | |
| parent | 632b06aa2842b12c6d6a510ec080fb6ebdb38ea5 (diff) | |
ip_tunnel: Fix dst ref-count.
Commit 10ddceb22ba (ip_tunnel:multicast process cause panic due
to skb->_skb_refdst NULL pointer) removed dst-drop call from
ip-tunnel-recv.
Following commit reintroduce dst-drop and fix the original bug by
checking loopback packet before releasing dst.
Original bug: https://bugzilla.kernel.org/show_bug.cgi?id=70681
CC: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/gre_demux.c | 8 | ||||
| -rw-r--r-- | net/ipv4/ip_tunnel.c | 3 | ||||
| -rw-r--r-- | net/ipv4/ip_tunnel_core.c | 1 |
3 files changed, 9 insertions, 3 deletions
diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c index 1863422fb7d..250be7421ab 100644 --- a/net/ipv4/gre_demux.c +++ b/net/ipv4/gre_demux.c @@ -182,6 +182,14 @@ static int gre_cisco_rcv(struct sk_buff *skb) int i; bool csum_err = false; +#ifdef CONFIG_NET_IPGRE_BROADCAST + if (ipv4_is_multicast(ip_hdr(skb)->daddr)) { + /* Looped back packet, drop it! */ + if (rt_is_output_route(skb_rtable(skb))) + goto drop; + } +#endif + if (parse_gre_header(skb, &tpi, &csum_err) < 0) goto drop; diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 78a89e61925..a82a22d8f77 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -416,9 +416,6 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, #ifdef CONFIG_NET_IPGRE_BROADCAST if (ipv4_is_multicast(iph->daddr)) { - /* Looped back packet, drop it! */ - if (rt_is_output_route(skb_rtable(skb))) - goto drop; tunnel->dev->stats.multicast++; skb->pkt_type = PACKET_BROADCAST; } diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 6f847dd56db..8d69626f220 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -108,6 +108,7 @@ int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto) nf_reset(skb); secpath_reset(skb); skb_clear_hash_if_not_l4(skb); + skb_dst_drop(skb); skb->vlan_tci = 0; skb_set_queue_mapping(skb, 0); skb->pkt_type = PACKET_HOST; |