From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: Bug, kernel panic, NULL dereference , cleanup_once /
 icmp_route_lookup.clone.19.clone / nat , 2.6.39-rc7-git11
Date: Wed, 18 May 2011 17:52:24 +0200
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To: Denys Fedoryshchenko <denys@visp.net.lb>
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Le mercredi 18 mai 2011 =C3=A0 15:46 +0300, Denys Fedoryshchenko a =C3=A9=
crit :

>  It is NAS, has ipv6 enabled recently (i am preparing for ipv6), but=20
>  ipv6 is not routed anywhere, maybe just automatically addresses=20
>  appearing on interfaces, including the one looking to customer subne=
t.=20
>  ppp is ipv4 only.
>=20

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