[PATCH] IPV4: dead lock in error path

[YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@xxxxxxxxxxxxxx>]

Hello.

We forgot to release ipip_lock in error path.

--yoshfuji

===== net/ipv4/ipip.c 1.40 vs edited =====
--- 1.40/net/ipv4/ipip.c        Mon Feb 23 14:45:28 2004
+++ edited/net/ipv4/ipip.c      Fri May 21 17:17:28 2004
@@ -479,6 +479,7 @@
        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;
                }

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@xxxxxxxxxxxxxx>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA