Re: [Xen-devel] [PATCH] xen/arm: Correctly handle non-page aligned pointer in raw_copy_*

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 02/18/2014 02:59 PM, Ian Campbell wrote:
> On Fri, 2014-02-14 at 17:10 +0000, Julien Grall wrote:
>> The current implementation of raw_copy_* helpers may lead to data corruption
>> and sometimes Xen crash when the guest virtual address is not aligned to
>> PAGE_SIZE.
> 
> Isn't a non-aligned address the vast majority of the cases (hypercall
> arguments on the guest stack)? How have we managed to get away with this
> for so long?

Because most of the time the size is smaller than 1 page. It not the
case with flask policy.

-- 
Julien Grall

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel