Date: Wed, 28 Sep 2005 17:51:46 +0200 From: Andre Oppermann <andre@freebsd.org> To: Kris Kennaway <kris@obsecurity.org> Cc: SUZUKI Shinsuke <suz@kame.net>, net@FreeBSD.org Subject: Re: ipv6 panic in 6.0 ([kris@FreeBSD.org: kern/85780: 'panic:bogus refcnt 0' in routing/ipv6]) Message-ID: <433ABC12.948DA54D@freebsd.org> References: <20050927222634.GA46375@xor.obsecurity.org> <x7psqtzyad.wl%suz@alaxala.net> <20050928151319.GA27347@xor.obsecurity.org>
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Kris Kennaway wrote: > > On Wed, Sep 28, 2005 at 12:06:18PM +0900, SUZUKI Shinsuke wrote: > > Hello kris, > > > > >>>>> On Tue, 27 Sep 2005 18:26:34 -0400 > > >>>>> kris@obsecurity.org(Kris Kennaway) said: > > > > > Can someone please look into this ipv6 panic? It is now my #1 panic > > > on 6.0 (every few days, and I hardly make any use of ipv6 except for > > > light nfs and tcp traffic), so it would be good to get it fixed before > > > the release. > > > > Let me confirm one thing. > > Did you also see a message "panic: bogus refcnt 0", in your panic? > > Yes, that's the panic string. > > > As far as I investigated, only IF_CLONE_REMREF_LOCKED() can display > > this message. But it's called only in > > if_clone_create/detach/destory(), and none of them seems to be called > > according to the description in the PR. (rtexpunge() in route.c also > > has this message, but it is commented out by "if 0", so it is not the > > cause of this message) > > I have a number of (sparc64) cores for this panic if you'd like to see > them. This particular panic string is used by RT_REMREF() via RTFREE_LOCKED() too. It could be triggered anywhere in the routing/network code. -- Andre
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