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Date:      Sat, 30 Oct 2004 23:52:43 +0200
From:      Stefan =?iso-8859-1?Q?E=DFer?= <se@FreeBSD.org>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc:        freebsd-bugs@FreeBSD.org
Subject:   Re: kern/73321: Reproducible Panic (LOR: I4B / INET6)
Message-ID:  <20041030215243.GA21152@StefanEsser.FreeBSD.org>
In-Reply-To: <Pine.BSF.4.53.0410302021020.73542@e0-0.zab2.int.zabbadoz.net>
References:  <20041030190101.E996D2305@StefanEsser.FreeBSD.org> <Pine.BSF.4.53.0410302021020.73542@e0-0.zab2.int.zabbadoz.net>

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On 2004-10-30 20:23 +0000, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> wrote:
> On Sat, 30 Oct 2004, Stefan Esser wrote:
> 
> > lock order reversal
> >  1st 0xc06d7980 ifnet (ifnet) @ netinet6/nd6.c:1799
> >  2nd 0xc06a9d24 user map (user map) @ vm/vm_map.c:2997
> 
> this had already been seen as LOR 033:
> http://sources.zabbadoz.net/freebsd/lor.html#033
> (caused by page fault)

Yes, I had noticed this only after sending the PR. I had looked for
a known LOR matching my observations in the list, but only after
sending it, I found that 033 describes the LOR, though not the panic.

According to the mail threat linked to by LOR 033, a fix has been
applied to -current and RELENG_5 by mlaier. But that fix did not
prevent the panic I observed. The threat did contain a patch that
_does_ work, though, and I hope that thios patch (even if it is
only a work-around) makes it into 5.3 ...

Regards, STefan




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