[OmniOS-discuss] (no subject)

[Dan McDonald]

One thing you can try is to overwrite the file and then remove it.  Someone else reported a similar vug, and it turned out to be corrupt metadata or extended attributes.

Do you have a URL  for the panic?  Also, please try today's update.

Dan 

Sent from my iPhone (typos, autocorrect, and all)

> On Sep 14, 2015, at 6:09 PM, Omen Wild <omen.wild at gmail.com> wrote:
> 
> [ I originally posted this to the Illumos ZFS list but got no responses. ]
> 
> We have an up to date OmniOS system that panics every time we try to
> unlink a specific file. We have a kernel pages-only crashdump and can
> reproduce easily. I can make the panic files available to an interested
> party. 
> 
> A zpool scrub turned up no errors or repairs. 
> 
> Mostly we are wondering how to clear the corruption off disk and worried
> what else might be corrupt since the scrub turns up no issues.
> 
> Details below.
> 
> When we first encountered the issue we were running with a version from
> mid-July: zfs at 0.5.11,5.11-0.151014:20150417T182430Z .
> 
> After the first couple panics we upgraded to the newest (as of a couple
> days ago, zfs at 0.5.11,5.11-0.151014:20150818T161042Z) which still panics.
> 
> # uname -a
> SunOS zaphod 5.11 omnios-d08e0e5 i86pc i386 i86pc
> 
> The error looks like this:
> BAD TRAP: type=e (#pf Page fault) rp=ffffff002ed54b00 addr=e8 occurred in module "zfs" due to a NULL pointer dereference
> 
> The panic stack looks like this in every case:
>   param_preset
>   die+0xdf
>   trap+0xdb3
>   0xfffffffffb8001d6
>   zfs_remove+0x395
>   fop_remove+0x5b
>   vn_removeat+0x382
>   unlinkat+0x59
>   _sys_sysenter_post_swapgs+0x149
> 
> It is triggered by trying to rm a specific file. ls'ing the file gives
> the error "Operation not applicable", ls'ing the directory shows ? in
> place of the data:
> 
> ??????????   ? ?        ?          ?            ? filename.html
> 
> I have attached the output of:
> echo '::panicinfo\n::cpuinfo -v\n::threadlist -v 10\n::msgbuf\n*panic_thread::findstack -v\n::stacks' | mdb 7
> 
> I am a Solaris/OI/OmniOS debugging neophyte, but will happily run any
> commands recommended.
> 
> Thanks
>  Omen
> <crash.1>
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