lkml.org 
[lkml]   [2011]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC][PATCH] Randomize kernel base address on boot
From
Date
On Thu, 26 May 2011 16:01:21 EDT, Vivek Goyal said:

> Also randomization of kernel load address at run time will probably have
> some issues with crashkernel=X@Y address syntax. So far user knew what
> address first kernel is booting from and user could speicy where to
> reserve memory. Now it might happen that user specified some memory
> to reserve and kernel decided to occupy that space resulting in failed
> memory reservation for crash kernel.

That is however fixable - the randomizer just needs to make sure it doesn't
overlay the crashkernel= space, and the crashkernel needs to be started with a
'norandomize' parameter. If your threat model includes attacks on the
crashkernel that randomizing will help with, you got bigger problems. ;)

[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2011-05-26 22:19    [W:0.243 / U:1.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site