-CURRENT crashdumps, mbuf corruption
Jeremie Le Hen
jeremie at le-hen.org
Mon Dec 19 10:15:05 PST 2005
On Mon, Dec 05, 2005 at 05:27:25PM -0500, Travis Mikalson wrote:
> This looks like an mbuf corruption problem, can you take a look at these?
> I've got two different ones, one seems to involve all of my network
> interfaces and another seems just to involve if_ath. I'm not an expert
> at reading this, but both crashes look like they choked on corrupt mbufs.
> I have WITNESS and INVARIANT running in that kernel, I don't know if
> they are of any use for figuring this problem out.
> Is there any additional information available that I can retrieve that
> can help? I'm told that mbuf corruption problems are very hard to track
> down, I'm wondering if there's anything I can do.
> FYI, this box's job in life at the moment while I've got it as
> stripped-down as possible is to shuffle packets back and forth between
> one if_ath (in hostap mode) and one if_vr using if_bridge. ipfw is in
> there somewhere but net.link.bridge.pfil_bridge is off and so is
> net.link.ether.ipfw and net.link.bridge.ipfw.
Most of the time a stack trace suffices to a commiter to identify the
problem. Having a kernel dump is good, but it requires to download
a heavy file and this is certainly why you have't got an answer yet.
You should use kgdb on you memory dump to obtain a stack trace and
post it here in conjunction to the FreeBSD version you are using.
Note that making kernel memory dumps publicly available is a security
problem as the memory may contain sensitive informations.
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >
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