linux-kernel - Re: [2.6.34-rc5-git6] EIP: is at inet6_csk_bind

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Date:	Sun, 25 Apr 2010 18:39:57 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	piotr@...owicz.com
Cc:	sedat.dilek@...il.com, Sedat Dilek <sedat.dilek@...glemail.com>,
	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	Jiri Olsa <jolsa@...hat.com>,
	Jongman Heo <jongman.heo@...il.com>
Subject: Re: [2.6.34-rc5-git6] EIP: is at inet6_csk_bind_conflict +
 06xe/0xb7 [ipv6]

Le dimanche 25 avril 2010 à 18:36 +0200, Piotr Hosowicz a écrit :
> On 25.04.2010 18:31, Sedat Dilek wrote:
> > [ CCing netdev ML ]
> >
> > Confirmed: The revert-patch [1] fixes the problem here.
> 
> I confirm, I've built a git6 kernel and it works fine.
> 
> > See also "Bug 15847 -  crash in inet6_csk_bind_conflict" [2].
> >
> > Feel free to add a... Tested-by: Sedat Dilek<sedat.dilek@...il.com>
> 
> I added created and tested phrase in my archive. ;-) Thank you a lot. I 
> hope there will be no this error in git7.
> 

Did you test the proposed fix ?


[PATCH] ipv6: Fix inet6_csk_bind_conflict()

Commit fda48a0d7a84 (tcp: bind() fix when many ports are bound)
introduced a bug on IPV6 part.
We should not call ipv6_addr_any(inet6_rcv_saddr(sk2)) but
ipv6_addr_any(inet6_rcv_saddr(sk)) because sk2 can be IPV4, while sk is
IPV6.

Reported-by: Michael S. Tsirkin <mst@...hat.com>
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index b4b7d40..3a4d92b 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -48,7 +48,7 @@ int inet6_csk_bind_conflict(const struct sock *sk,
 			     ipv6_rcv_saddr_equal(sk, sk2))
 				break;
 			else if (sk->sk_reuse && sk2->sk_reuse &&
-				!ipv6_addr_any(inet6_rcv_saddr(sk2)) &&
+				!ipv6_addr_any(inet6_rcv_saddr(sk)) &&
 				ipv6_rcv_saddr_equal(sk, sk2))
 				break;
 		}


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