Date: Wed, 9 Mar 2005 17:07:35 +0100 (CET) From: pcasidy@casidy.com To: dwhite@gumbysoft.com Cc: freebsd-stable@freebsd.org Subject: Re: if_bfe/uhci: storm interrupt Fatal trap 12 Message-ID: <20050309155825.2B6F6B86C@smtp.casidy.net> In-Reply-To: <20050307191149.T32508@carver.gumbysoft.com>
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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
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.
Well, I will add this info to the message I sent on current@.
Phil.
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