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Date:      Thu, 7 Oct 2004 06:41:40 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        Chris O'Brien <obrienster@gmail.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: Pagefault in BETA7 with ifconfig
Message-ID:  <20041007134140.GA93319@xor.obsecurity.org>
In-Reply-To: <fe015b72041007063724064961@mail.gmail.com>
References:  <fe015b72041007063724064961@mail.gmail.com>

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On Thu, Oct 07, 2004 at 09:37:29AM -0400, Chris O'Brien wrote:
> I noticed this in BETA6 just before I upgraded to BETA7.  I have a
> Dell Inspiron 1150 laptop with a bfe ethernet interface.  It is
> getting it's IP via DHCP and I don't have any other special options
> set via rc.conf
>=20
> If I issue these two commands:
> #sudo ifconfig bfe0 down
> #sudo ifconfig bfe0 up
>=20
> I get the following message:
>=20
> Fatal trap 12: page fault while in kernel mode
> fault virtual address    =3D 0xb
> fault code               =3D supervisor read, page not present
> instruction pointer      =3D 0x8:0xc0607a08
> stack pointer            =3D 0x10:0xe7d2bb18
> frame pointer            =3D 0x10:0xe7d2bb20
> code segment             =3D base 0x0, limit 0xfffff, type 0x1b
>                          =3D DPL 0, pres 1, def32 1, gran 1
> processor eflags         =3D interrupt enabled, resume, IOPL =3D 0
> current process          =3D 498 (ifconfig)
> trap number              =3D 12
> panic: page fault
> uptime: 49s
>=20
> Is this a known issue?  I thought I remember seeing something on the
> todo list, but I don't see it anymore.

I think this was fixed already.  Please update and retry.  If it
recurs, get a traceback as described in the developers handbook
chapter on kernel debugging.

Kris
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