[lkml]   [2010]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: AMD Geode NOPL emulation for kernel 2.6.36-rc2
On 08/27/2010 02:32 PM, Matteo Croce wrote:
> can I ignore the return value when I expect val to be non zero?
> the doc says: "On error, the variable @x is set to zero."

No. You need to deliver a page fault to the application in this case.

The *real* test for this kind of crap is correct page fault behavior,
and so forth.

Also, at the very least you need to check for:

- IP in the proper range for user space

Your patch in its current form is one big security hole.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

 \ /
  Last update: 2010-08-28 01:11    [W:0.072 / U:44.772 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site