From: Xin Long Date: Mon, 3 Mar 2014 12:18:36 +0000 (+0800) Subject: ip_tunnel:multicast process cause panic due to skb->_skb_refdst NULL pointer X-Git-Tag: v3.14-rc6~30^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=10ddceb22bab11dab10ba645c7df2e4a8e7a5db5;p=kernel%2Fkernel-generic.git ip_tunnel:multicast process cause panic due to skb->_skb_refdst NULL pointer when ip_tunnel process multicast packets, it may check if the packet is looped back packet though 'rt_is_output_route(skb_rtable(skb))' in ip_tunnel_rcv(), but before that , skb->_skb_refdst has been dropped in iptunnel_pull_header(), so which leads to a panic. fix the bug: https://bugzilla.kernel.org/show_bug.cgi?id=70681 Signed-off-by: Xin Long Signed-off-by: David S. Miller --- diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 8d69626..6f847dd 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -108,7 +108,6 @@ 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;