Repeated panic: ffs_checkblk: bad block -1 on rpi2

[Ian Lepore]

On Fri, 2015-12-04 at 09:00 -0800, bob prohaska wrote:
> Hi all,
> 
> The last few attempts to build world have failed with 
> panic: ffs_checkblk: bad block -1
> The latest incident was at r291652.
> 
> So far, it's been possible to restart the machine and
> complete the build/install cycle, typically in single
> user mode as a precaution. Once complete the reboot has
> been uneventful.
> 
> The same failure has been seen on both disk and flash
> backed machines. Later instances have been on the disk-
> backed machine, simply because it is the only one with
> serial console. 
> 
> The latest event is documented to the best of my ability at
> www.zefox.net/~fbsd/rpi2/crashes/build_12_4_15
> 
> Is there any chance this might be a hardware issue? For the
> moment I tend to think not, but am far from certain.
> 
> Thanks for reading and any guidance,
> 
> bob prohaska
> 


I see from your console log that you're on r291652.  I think the
problem you're having was introduced at r291460 and fixed in r291671
and/or r291743.  So just updating the kernel source may fix it.  The
problem may prevent you from building a newer kernel, you might have to
crossbuild it, or grab a kernel out of a snapshot archive from a couple
weeks ago.

-- Ian