CURRENT r331284: crashing with USB

[Warner Losh]

On Wed, Mar 21, 2018 at 8:42 PM, Hyun Hwang <hyun at caffeinated.codes> wrote:

> On Wednesday, March 21, 2018, 12:07 PM (UTC+0100), "Hartmann, O." <
> ohartmann at walstatt.org> wrote:
> > Hello.
> >
> > Incident: CURRENT r331284 can be brought down reliably with an USB
> > flash drive plugged in and out without mounting or doing anything with
> > it.
> >
> > [...]
> >
> > Does anyone else observe this bug?
> >
>
> Can confirm: whenever I plug my Transcend USB microSD reader into my
> builder (amd64, r331284), the kernel does attach da0 then immediately
> panics and falls down to `db>` prompt.
>

Do you have a traceback?

Warner


> > I can plugin the USB and then unplug it and after two or three times
> doing this, the box goes down.
>
> I did not even have to plug-unplug the reader three times; plug the reader
> in and bam! immediate panic.
>
> AFAIK, r331115 did not have this issue because I was able to update my RPi
> 2 with the very reader from the very builder.
> I managed to salvage kernel binary dump; in case the dump is needed,
> please let me know.
> --
> Hyun Hwang
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