linux-kernel - Re: [Oops] 2.6.31-rc1: tun

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Date:	Sat, 27 Jun 2009 19:18:32 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Sergei Trofimovich <slyich@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [Oops] 2.6.31-rc1: tun

Sergei Trofimovich <slyich@...il.com> wrote:
> 
> Updated from 2.6.30 to 2.6.31-rc1
> 
> $ uname -a
> Linux mosly 2.6.31-rc1 #16 SMP PREEMPT Thu Jun 25 22:14:24 EEST 2009 x86_64 Intel(R) Core(TM)2 Duo CPU U7600 @ 1.20GHz GenuineIntel GNU/Linux
> 
> All my tun interfaces stopped working. ICMP works but IP(TCP/UDP) does not.
> Machine started to hang. I tried to reproduce in linux console. You see the .png result.
> .config attached

This patch should help (already merged by davem).

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 490ce20..db46b4b 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -440,6 +440,9 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
 	/* Remove any debris in the socket control block */
 	memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
 
+	/* Must drop socket now because of tproxy. */
+	skb_orphan(skb);
+
 	return NF_HOOK(PF_INET, NF_INET_PRE_ROUTING, skb, dev, NULL,
 		       ip_rcv_finish);
 
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index c3a07d7..6d6a427 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -139,6 +139,9 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
 	rcu_read_unlock();
 
+	/* Must drop socket now because of tproxy. */
+	skb_orphan(skb);
+
 	return NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, dev, NULL,
 		       ip6_rcv_finish);
 err:

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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