Re: zfs corruption at zroot/usr/home:<0x0>

On Wed, 12 Nov 2025 03:58:34 +0100
Tomek CEDRO <tomek@cedro.info> wrote:

> Hello world :-)
> 
> On 14.3-RELEASE-p5 amd64 I have encountered a kernel panic (will
> report on bugzilla in a moment). After that I found some sites did not
> load in a web browser, so my first guess was to try zpool status -v
> and I got this:
> 
> errors: Permanent errors have been detected in the following files:
>         zroot/usr/home:<0x0>
> 
> Any guess what does the <0x0> mean and how to fix the situation?
> It should be a file name right?
> 
> zpool scrub and resilver did not help :-(
> 
> Will rolling back a snapshot fix the problem?
> 
> Any hints appreciated :-)
> Tomek
> 
> --
> CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
> 

Hi, I'm not a ZFS expert, but I wonder if this error is related to some
of the ZFS internal objects, rather than the file data blocks being
corrupted. In which case, ZFS may not be able to correctly repair it?

I'm currently evaluating ZFS on FreeBSD for some of my storage needs
and your report is a bit concerning. Are you able to share the details
on the I/O workloads and the storage geometry you use? Do you have more
info on the kernel panic message or backtraces?

If you put it all in the bug, then can you please share the bug ID?

Thanks.