From: Kasper Sandberg <lkml@metanurb.dk>
To: "Tarmo Tänav" <tarmo@itech.ee>
Cc: linux-kernel@vger.kernel.org
Subject: Re: reiserfs+acl makes processes hang?
Date: Sat, 16 Jul 2005 01:25:20 +0200 [thread overview]
Message-ID: <1121469920.18525.0.camel@localhost> (raw)
In-Reply-To: <1121469596.17539.9.camel@localhost>
confirmed, i run 2.6.12 with reiserfs, created with reiserfsprogs 3.6.19
On Fri, 2005-07-15 at 23:19 +0000, Tarmo Tänav wrote:
> Hi,
>
> I think I've found a bug in reiserfs acls. If triggered
> it means that any program trying to access the partition,
> where the bug occured, will just hang in D state, with
> no way to kill the program.
>
> Here's how to reproduce:
> 1. mount a reiserfs volume (loopmount will do) with "-o acl".
> 2. create a directory "dir"
> 3. set some default acl: setfacl -d -m u:username:rwX dir
> 4. cd dir
> 5. dd if=/dev/zero of=somefile1 bs=4k count=100000
> (the idea is to run out of space)
> 6. now df should show 0 free space, if not then repeat 5.
> 7. echo "1" > somefile2 # this should hang infinitely
>
> Now no program will be able to access the partition.
>
> I haven't tried to reproduce it, but the same problem also happened
> when a user hit his hard quota limit on my server. Then no program
> could access his homedir.
>
>
> PS. I'm not subscribed to lkml so please CC
>
> --
> Tarmo Tänav
> tarmo@itech.ee
>
> -
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next prev parent reply other threads:[~2005-07-15 23:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-15 23:19 Tarmo Tänav
2005-07-15 23:25 ` Kasper Sandberg [this message]
2005-07-16 8:24 ` Jan Engelhardt
2005-07-16 8:46 ` Tarmo Tänav
2005-07-16 14:23 ` Jan Engelhardt
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