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ip_tunnel: fix potential issue in ip_tunnel_rcv

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

Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.")
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
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 10:29:29 +08:00 committed by David S. Miller
parent be56a099e0
commit 469f87e158
1 changed files with 2 additions and 0 deletions
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2
net/ipv4/ip_tunnel.c
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@ -446,6 +446,8 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
return 0;
drop:
if (tun_dst)
dst_release((struct dst_entry *)tun_dst);
kfree_skb(skb);
return 0;
}