Date: Wed, 9 Mar 2005 19:24:08 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: pcasidy@casidy.com Cc: freebsd-stable@freebsd.org Subject: Re: if_bfe/uhci: storm interrupt Fatal trap 12 Message-ID: <20050309192326.A53002@carver.gumbysoft.com> In-Reply-To: <20050309155825.2B6F6B86C@smtp.casidy.net> References: <20050309155825.2B6F6B86C@smtp.casidy.net>
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On Wed, 9 Mar 2005 pcasidy@casidy.com wrote:
> On 7 Mar, Doug White wrote:
> > Thanks for the detailed message. I didn't realize that we'd enabled DDB in
> > the snapshot kernel :)
> >
> > Anyway this looks like a bug in the bfe driver. It appears to be trying
> > to free a DMA map that is either unallocated or got spammed. You may want
> > to repost this to freebsd-current@freebsd.org and use a subject like
> > "Use-after-free in bfe" since I think the interrupt storm message is
> > secondary.
> >
> > A capture of boot -v might also be useful, or at minumum anything the bfe
> > driver output during boot ('dmesg | grep bfe' might work with the fixit
> > disc). A crashdump would be nice too, but you'd likely need to find a
> > different network adapter.
> >
>
> I have escalated this problem to current@.
>
> I have also built a STABLE kernel with DDD and KDB options and the line
> where the problem occurs is
>
> _bus_dmamap_unload+0x16: movl 0x10(%eax),%eax
That was in the previous trace.
> I have enable crash dumps (I think) but when booting I have "savecore:
> no dumps found". I think the problem is that i have 1.5Gb of memory and
> only 1Gb of swap.
Yeah, that will be a problem.
--
Doug White | FreeBSD: The Power to Serve
dwhite@gumbysoft.com | www.FreeBSD.org
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