From: Chris Mason <chris.mason@fusionio.com>
To: David Sterba <dave@jikos.cz>
Cc: Chris Mason <clmason@fusionio.com>,
Pascal Junod <pascal@junod.info>,
linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: [btrfs] is vulnerable to a hash-DoS attack
Date: Thu, 13 Dec 2012 17:07:27 -0500 [thread overview]
Message-ID: <20121213220727.GC27308@shiny> (raw)
In-Reply-To: <20121213213430.GB22426@twin.jikos.cz>
On Thu, Dec 13, 2012 at 02:34:30PM -0700, David Sterba wrote:
> On Thu, Dec 13, 2012 at 03:52:08PM -0500, Chris Mason wrote:
> > Thanks for taking the time to write this up. As far as I can tell, the
> > looping was actually fixed in an older kernel and I just misread our
> > version string in your original email.
>
> Yeah, the blogpost says 3.3.7. I did a quick test with 3.7 and was not
> able to reproduce it.
I tried with 3.3 and every step between 3.3 and 3.7. I'm not able to
reproduce the problem, and I did run with Hack=True in the script
(thanks for the flag btw, I really like that).
So, that leaves us with a few possibilities:
1) mount -o seclabel
2) The small size of the device
3) loopback
I ran with a 1GB FS here on 3.3 and wasn't able to trigger things. But
Pascal, could you please help narrow the problem down?
-chris
next prev parent reply other threads:[~2012-12-13 22:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-13 12:56 [btrfs] is vulnerable to a hash-DoS attack Pascal Junod
2012-12-13 20:52 ` Chris Mason
2012-12-13 21:34 ` David Sterba
2012-12-13 22:07 ` Chris Mason [this message]
2012-12-14 14:29 ` Chris Mason
2012-12-14 16:41 ` Pascal Junod
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