kern/150544: Panic, when viewing the list of ZFS snapshots
Andriy Gapon
avg at icyb.net.ua
Tue Sep 14 06:20:03 UTC 2010
The following reply was made to PR kern/150544; it has been noted by GNATS.
From: Andriy Gapon <avg at icyb.net.ua>
To: jhell <jhell at DataIX.net>
Cc: "Vladislav V. Prodan" <universite at ukr.net>, bug-followup at FreeBSD.org
Subject: Re: kern/150544: Panic, when viewing the list of ZFS snapshots
Date: Tue, 14 Sep 2010 09:19:09 +0300
on 14/09/2010 08:56 jhell said the following:
> Priority of this should be changed to *HIGH* & Severity changed to
> *Critical*.
>
> New synopsis: [ZFS][HIGH][CRIT] amd64 & i386 stable/8-ZFSv15 &
> HEAD-ZFSv15, Panic, during ls(1) while in snapshot directories.
>
> People BCC'd, pjd@ mm@ avg@ stable@ current@ to grab some more attention.
>
> Backtraces: I have two available vmcore.37 & 38 along with core.txt.37 & 38.
>
> Backtrace 37 attached.
>
> Background: Because a normal user can access snapshot directories(.zfs)
> they have the ability to crash a machine running HEAD or stable/8 with
> ZFSv15 patches.
>
> Workaround: Do not snapshot global readable directories or chmod go-rwx
> /path/to where the snapshot directory (.zfs) is.
>
> Systems effected thus far:
> FreeBSD/i386 8.1-STABLE r212590M (ZFSv15 patches)
> FreeBSD 9.0-CURRENT ? ?
> Possibly 8.1-RELEASE (ZFSv15 patches)
Looks like unimplemented vop_lock1.
I think that default implementation usually comes in via default_vnodeops, but
can be locally overridden.
What kind of a vnode is this? Can you print *vp in e.g. frame 8?
--
Andriy Gapon
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