* [PATCH net-next] ip_tunnel:multicast process cause panic due to skb->_skb_refdst NULL pointer
@ 2014-02-22 8:43 lucien
0 siblings, 0 replies; only message in thread
From: lucien @ 2014-02-22 8:43 UTC (permalink / raw)
To: netdev; +Cc: davem, kuznet, jmorris, yoshfuji, kaber
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
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 6156f4e..88b08aa 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;
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2014-02-22 8:43 [PATCH net-next] ip_tunnel:multicast process cause panic due to skb->_skb_refdst NULL pointer lucien
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