The following reply was made to PR usb/168743; it has been noted by GNATS.
To: Hans Petter Selasky <hsela...@c2i.net>
Cc: firstname.lastname@example.org, freebsd-gnats-sub...@freebsd.org
Subject: Re: usb/168743: panic: double fault caused by umass
Date: Mon, 11 Jun 2012 19:53:51 +0200
I'm compiling a new kernel with those options as I type. Yes, this is
very much reproduceable. If you look at the dmesg you will also see
the previous reboot for the same reason but with a different device -
a WLAN stick that also includes some mass storage for the windows
driver and probably another for the mini-sd or whatever card fits in
The Pendrive I then used is a 64MB (yes, megabytes) so from that you
can probably guess how ancient that thing is so it should not have any
new and fancy options aka quirks ;).
What I haven't tried yet is simply loading the module while no device
I'll try that when I have the new kernel booted. It will take some
time though since this is a 500MHz Geode..
I think I also saw a few other bugreports related to this issue maybe
someone else already included a backtrace.
Thanks for looking into this,
Zitat von Hans Petter Selasky <hsela...@c2i.net>:
> This sounds like a missing MODULE_DEPEND() issue or your pendrive is
> an error code to some of the SCSI commands which is not handled properly.
> Could you add these options to the kernel config file:
> options KDB # Kernel debugger related code
> options KDB_TRACE # Print a stack trace for a panic
> Then get full backtrace.
> Is this issue reproducable. I cannot reproduce over here using a 9-stable
> GENERIC kernel without "device umass".
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