netdev - Re: 2.6.25-rc9: Reported regressions from 2.6.24

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Message-ID: <480262E9.4030500@trash.net>
Date:	Sun, 13 Apr 2008 21:45:45 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>,
	Linux Netdev List <netdev@...r.kernel.org>,
	andy@...yhouse.net, Pavel Emelyanov <xemul@...nvz.org>
Subject: Re: 2.6.25-rc9: Reported regressions from 2.6.24

Rafael J. Wysocki wrote:
> This message contains a list of some regressions from 2.6.24, for which there
> are no fixes in the mainline I know of.  If any of them have been fixed already,
> please let me know.
>
>
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=10323
> Subject		: panic using bridging on linus kernel 2.6.25-rc6
> Submitter	: Andy Gospodarek <andy@...yhouse.net>
> Date		: 2008-03-25 11:40 (20 days old)

This looks like another network-namespace regression.
icmp_send() does:

        net = rt->u.dst.dev->nd_net;

The bridge netfilter code attaches a fake dst_entry to the
skb which has dev == NULL when passing it to IPv4 netfilter.

Pavel, do you have a better ideas for fixing this than
instantiating a dst_entry in br_netfilter.c for every
device (or at least for every namespace)?



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