[PATCH] xfs: fix acl count validation in xfs_acl_from_disk()

[Christoph Hellwig]

On Mon, Dec 12, 2011 at 04:55:52PM -0500, Xi Wang wrote:
> Commit fa8b18ed didn't prevent the integer overflow and possible
> memory corruption.  "count" can go negative and bypass the check.

Thanks, this looks good to me.

Reviewed-by: Christoph Hellwig <hch at lst.de>