[IPV4]: Fix deadlock in IP tunnel error path.

34315ee2 · Hideaki Yoshifuji · David S. Miller · bd25e412 · 34315ee2
Commit 34315ee2 authored May 21, 2004 by Hideaki Yoshifuji Committed by David S. Miller May 21, 2004
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net/ipv4/ipip.c net/ipv4/ipip.c +1 -0

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--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -479,6 +479,7 @@ static int ipip_rcv(struct sk_buff *skb)
 	read_lock(&ipip_lock);
 	if ((tunnel = ipip_tunnel_lookup(iph->saddr, iph->daddr)) != NULL) {
 		if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+			read_unlock(&ipip_lock);
 			kfree_skb(skb);
 			return 0;
 		}