netdev - Re: 2.6.36-rc7: net/bridge causes temporary network I/O lockups [2]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 20 Oct 2010 14:16:31 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Patrick Ringl <patrick_@...enet.de>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	bridge@...ts.linux-foundation.org
Subject: Re: 2.6.36-rc7: net/bridge causes temporary network I/O lockups [2]

On Mon, Oct 18, 2010 at 10:37:40PM +0200, Patrick Ringl wrote:
>
> Anything else I could possibly provide? :-)

Yes, testing :)

First of all I'd like to rule out (or in) the IPv6 query code,
which is clearly generating a bogus packet (wrong payload_len).

So can you apply this patch and see if it makes the problem
go away? Please take packet dumps so we know that the IPv6 query
is no longer being sent.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index eb5b256..66f39d7 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -832,11 +832,6 @@ static void br_multicast_send_query(struct net_bridge *br,
 	br_group.proto = htons(ETH_P_IP);
 	__br_multicast_send_query(br, port, &br_group);
 
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-	br_group.proto = htons(ETH_P_IPV6);
-	__br_multicast_send_query(br, port, &br_group);
-#endif
-
 	time = jiffies;
 	time += sent < br->multicast_startup_query_count ?
 		br->multicast_startup_query_interval :
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html