[lkml]   [2010]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Stable-review] [141/145] KVM: x86 emulator: Check CPL level during privilege instruction emulation
Greg KH wrote:
> On Sat, Mar 13, 2010 at 08:37:57PM +0000, Ben Hutchings wrote:
>> On Fri, 2010-03-12 at 16:27 -0800, Greg KH wrote:
>>> 2.6.32-stable review patch. If anyone has any objections, please let me know.
>>> ----------------
>>> From: Gleb Natapov <>
>>> commit e92805ac1228626c59c865f2f4e9059b9fb8c97b upstream.
>>> Add CPL checking in case emulator is tricked into emulating
>>> privilege instruction from userspace.
>> There were more security fixes released along with this, which surely
>> belong in a stable update:
>> 1871c6020d7308afb99127bba51f04548e7ca84e KVM: x86 emulator: fix memory access during x86 emulation

This one caused a regression for AMD cpus. There is a patch for it in the
process but not upstream, yet.

>> f850e2e603bf5a05b0aee7901857cf85715aa694 KVM: x86 emulator: Check IOPL level during io instruction emulation
>> d4c6a1549c056f1d817e8f6f2f97d8b44933472f KVM: x86 emulator: Fix popf emulation
> Yes, there were a number of kvm patches that I could not apply either
> because they did not apply, or because they caused build errors. These
> are some of them. I have asked the KVM developers to properly backport
> them as I know nothing about KVM. Hopefully that will be done for the
> next round of stable releases.

I have done some backport work for 2.6.32 at least. This can be found at

git:// kvm

I have successfully booted a guest after the changes but it would surely help if
the KVM developers could give some review on the set.

> thanks,
> greg k-h
> _______________________________________________
> Stable-review mailing list

 \ /
  Last update: 2010-03-14 19:25    [W:0.108 / U:7.424 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site