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ip6_tunnel: fix potential issue in __ip6_tnl_rcv 

When __ip6_tnl_rcv fails, the tun_dst won't be freed, so call
dst_release to free it in error code path.

Fixes: 8d79266bc4 ("ip6_tunnel: add collect_md mode to IPv6 tunnels")
CC: Alexei Starovoitov <ast@fb.com>
Tested-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haishuang Yan 2017-06-15 10:29:30 +08:00 committed by David S. Miller
parent 469f87e158
commit f1925ca50d
1 changed files with 2 additions and 0 deletions
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2
net/ipv6/ip6_tunnel.c
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@ -858,6 +858,8 @@ static int __ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb,
return 0; return 0;
drop: drop:
if (tun_dst)
dst_release((struct dst_entry *)tun_dst);
kfree_skb(skb); kfree_skb(skb);
return 0; return 0;
} }