lkml.org 
[lkml]   [2018]   [Jul]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: powerpc/8xx: fix handling of early NULL pointer dereference
Date
On Fri, 2018-07-13 at 13:10:47 UTC, Christophe Leroy wrote:
> NULL pointers are pointers to user memory space. So user pagetable
> has to be set in order to avoid random behaviour in case of NULL
> pointer dereference, otherwise we may encounter random memory
> access hence Machine Check Exception from TLB Miss handlers.
>
> Set user pagetable as early as possible in order to properly
> catch early kernel NULL pointer dereference.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/8c8c10b90d88bfaad41ea34df17bf6

cheers

\
 
 \ /
  Last update: 2018-07-23 17:12    [W:0.048 / U:0.364 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site