Re: [KVM] BUG: unable to handle kernel NULL pointer dereference at 00000000000002b0

From: Paolo Bonzini
Date: Mon Apr 28 2014 - 07:34:32 EST


Il 28/04/2014 11:54, Jet Chen ha scritto:
>> We noticed the below kernel BUG on
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>
> What commit?
>
This one,

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

commit 93c4adc7afedf9b0ec190066d45b6d67db5270da
Author: Paolo Bonzini <pbonzini@xxxxxxxxxx>
AuthorDate: Wed Mar 5 23:19:52 2014 +0100
Commit: Paolo Bonzini <pbonzini@xxxxxxxxxx>
CommitDate: Mon Mar 17 12:21:39 2014 +0100

KVM: x86: handle missing MPX in nested virtualization


BTW, the same issue has been reported by Fengguang last month.

https://lkml.org/lkml/2014/3/26/200

It should have been fixed already by commit 920c83778569 (KVM: vmx: fix MPX detection, 2014-03-26). That's why I was confused, I thought it was for a recent commit on Linus's master branch.

Paolo
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