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Date:      Mon, 3 Sep 2012 10:45:25 +0200
From:      Fabian Keil <freebsd-listen@fabiankeil.de>
To:        freebsd-fs@freebsd.org
Subject:   Re: Panic in zfs_freebsd_getattr -> zfs_fuid_table_load - avl_find() succeeded inside avl_add() [ACL, 9.1-PRERELEASE] [SOLVED]
Message-ID:  <20120903104525.531e5d3d@fabiankeil.de>
In-Reply-To: <5044556C.3020208@shatow.net>
References:  <504428EB.4020702@shatow.net> <CAOjFWZ7rtAG=fEKgEp9e3T69ENzCe6ZzyMzpWQbd7wtSC3938A@mail.gmail.com> <504430F9.8000105@shatow.net> <5044482D.90602@shatow.net> <5044556C.3020208@shatow.net>

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Bryan Drewery <bryan@shatow.net> wrote:

> On 9/3/2012 1:03 AM, Bryan Drewery wrote:
> > On 9/2/2012 11:24 PM, Bryan Drewery wrote:
> >>> On Sep 2, 2012 8:51 PM, "Bryan Drewery" <bryan@shatow.net
> >>> <mailto:bryan@shatow.net>> wrote:
> >>>
> >>>     Running 9.1-PRERELEASE currently.
> >>>
> >>>     Just set this server up, imported the pool from OpenIndiana 151 I
> >>>     believe it was.
> >>>
> >>>     When I access (simply `ls`) certain files/directories, the system
> >>>     panics. These files have ACL properties set on them from the Sola=
ris
> >>>     system.
> >>>
> >>>     This system has 32gb of ram and only 8gb swap setup, so I do not
> >>>     currently have a kernel core dump. It's also practically a produc=
tion
> >>>     machine, so I do not have much leeway in testing on it.

For the space issue setting debug.minidump and vfs.zfs.zio.exclude_metadata
could help (if they aren't set already).

> I've solved this and now have a working system.
>=20
> r230454 [1] fixes this. It had a MFC of 1 week but never made it to
> 9-STABLE.
>=20
> Please MFC this!
>=20
> OTOH, the change looks wrong, but I don't know enough to say that for
> certain.
>=20
>=20
> Why change kd_name to size 1, and then use strcpy(). Looks like an easy
> overflow.
>=20
> [1] http://lists.freebsd.org/pipermail/svn-src-head/2012-January/033707.h=
tml

Note that the size of the allocated buffer is sizeof(*kd) + strlen(domain),
not just sizeof(*kd).

Fabian

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