Re: [btrfs] is vulnerable to a hash-DoS attack

[ adding linux-btrfs ]

On Thu, Dec 13, 2012 at 05:56:37AM -0700, Pascal Junod wrote:

Hello folk,

The btrfs file system, part of the linux kernel, is vulnerable to a
trivial hash-DoS attack. More details can be found here:

http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/

Hi Pascal,

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.

I'll track down the commit that fixed things and send it off to the
stable series.  SuSE and Fujitsu have done a number of error handling
cleanups, it should be one of those.

-chris