Kernel panics, one starting with r248508

[Konstantin Belousov]

On Thu, Mar 21, 2013 at 03:58:55PM -0500, Joshua Isom wrote:
> I've been helping Adrian test the new ath improvements that support the 
> chipset I have.  The first kernel panic is on my system if I have the cd 
> driver loaded into the kernel, I would get a panic on boot.  While 
> "Mounting local file systems:" it would panic with "Memory modified 
> after free."  Removing the driver solved it.  I'd rather have wireless 
> than cd for right now anyway.  But a couple days ago a new build would 
> always panic, a couple seconds after getty is spawned.  All I get is 
> "panic: Bio too short 0xfffffe000b1395d0."  Before that, the builds 
> worked other than occasional issues due to cleaning.  The only place 
> that panic can be generated is geom_io.c so I'm guessing I can't just 
> remove the driver.  What needs done so I can get a working kernel again?

Try r248596. If it does not help, get a core dump, load it into kgdb
and do "p *(struct bio *)addr", where addr is reported in the panic message.
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