[PATCH, V3 (sort of)] xfs: zero proper structure size for geometry calls

[Jeffrey Hundstad]

On 03/01/2011 12:18 PM, Eric Sandeen wrote:
> On 3/1/11 11:50 AM, Alex Elder wrote:
>    
>> I'm sorry to muddy the waters with this.  But I think the
>> proposed patch fixes the wrong problem.  Having xfs_fs_geometry()
>> zero its argument is fine--it defines an interface and honors
>> it.  The real problem lies in xfs_ioc_fsgeometry_v1(), which
>> violates that interface by passing the address of an object
>> that's not the right size.  So below is an alternative to
>> Eric's solution which just fixes this one caller instead.
>>
>> Eric has already told me this makes more sense.  It would
>> be nice if Jeffrey would re-test this fix, and Dan would
>> sign off on it as well.
>>      
> Reviewed-by: Eric Sandeen<sandeen at redhat.com>

I can't tell you if the security concerns are met but I can tell you 
that xfs_fsr is working as one would expect without a Kernel panic.

Tested-by: Jeffrey Hundstad <jeffrey.hundstad at mnsu.edu>