netdev - Re: Bug, kernel panic, NULL dereference , cleanup_once / icmp_route_lookup.clone.19.clone / nat , 2.6.39-rc7-git11

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Message-ID: <1305733944.2991.45.camel@edumazet-laptop>
Date:	Wed, 18 May 2011 17:52:24 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	netdev@...r.kernel.org
Subject: Re: Bug, kernel panic, NULL dereference , cleanup_once /
 icmp_route_lookup.clone.19.clone / nat , 2.6.39-rc7-git11

Le mercredi 18 mai 2011 à 15:46 +0300, Denys Fedoryshchenko a écrit :

>  It is NAS, has ipv6 enabled recently (i am preparing for ipv6), but 
>  ipv6 is not routed anywhere, maybe just automatically addresses 
>  appearing on interfaces, including the one looking to customer subnet. 
>  ppp is ipv4 only.
> 

Hmm, it seems we have some inetpeer refcount leak somewhere.

Maybe one (struct rtable)->peer is not released on dst/rtable removal,
or we also leak dst/rtable (and their ->peer inetpeer)

Watch :

grep peer /proc/slabinfo
grep dst /proc/slabinfo


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