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| author | Li Hongjun <hongjun.li@6wind.com> | 2013-08-28 11:54:50 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-30 17:13:28 -0400 |
| commit | 737e828bdbdaf2f9d7de07f20a0308ac46ce5178 (patch) | |
| tree | ab12496674c4006b6a5cde6c53b7e18407bb1d44 /net/ipv4 | |
| parent | 2c8d85182348021fc0a1bed193a4be4161dc8364 (diff) | |
| download | linux-737e828bdbdaf2f9d7de07f20a0308ac46ce5178.tar.gz linux-737e828bdbdaf2f9d7de07f20a0308ac46ce5178.tar.bz2 linux-737e828bdbdaf2f9d7de07f20a0308ac46ce5178.zip | |
ipv4 tunnels: fix an oops when using ipip/sit with IPsec
Since commit 3d7b46cd20e3 (ip_tunnel: push generic protocol handling to
ip_tunnel module.), an Oops is triggered when an xfrm policy is configured on
an IPv4 over IPv4 tunnel.
xfrm4_policy_check() calls __xfrm_policy_check2(), which uses skb_dst(skb). But
this field is NULL because iptunnel_pull_header() calls skb_dst_drop(skb).
Signed-off-by: Li Hongjun <hongjun.li@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/ipip.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 51fc2a1dcdd3..b3ac3c3f6219 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -190,15 +190,14 @@ static int ipip_rcv(struct sk_buff *skb) struct ip_tunnel *tunnel; const struct iphdr *iph; - if (iptunnel_pull_header(skb, 0, tpi.proto)) - goto drop; - iph = ip_hdr(skb); tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, iph->saddr, iph->daddr, 0); if (tunnel) { if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) goto drop; + if (iptunnel_pull_header(skb, 0, tpi.proto)) + goto drop; return ip_tunnel_rcv(tunnel, skb, &tpi, log_ecn_error); } |