[PATCH] xfs: add more checks to superblock validation

[Christoph Hellwig]

On Fri, Apr 17, 2009 at 04:12:45PM -0500, Felix Blyakher wrote:
> From: Olaf Weber <olaf at sgi.com>
> 
> There had been reports where xfs filesystem was randomly
> corrupted with fsfuzzer, and xfs failed to handle it
> gracefully. This patch fixes couple of reported problem
> by providing additional checks in the superblock
> validation routine.

Looks good.