Re: Kernel Oops with kvm 66 running WinXP

[Michal Ludvig <mludvig@logix.net.nz>]

Avi Kivity wrote:
> Avi Kivity wrote:
>> Michal Ludvig wrote:
>>> Hi,
>>>
>>> I've experienced a kernel Oops on 2.6.24 with kvm 66 on AMD in 64bit 
>>> mode while starting up WinXP:
>>>
>>> kvm: emulating exchange as write
>>> Unable to handle kernel NULL pointer dereference at 0000000000000000 
>>> RIP:
>>>   [<ffffffff883a7a5a>] :kvm:x86_emulate_insn+0x3fa/0x4240
>>> PGD 7658d067 PUD 242a6067 PMD 0
>>> Oops: 0002 [1] SMP
>>> [...]
>>> The host is still alive but the XP guest is locked up in a boot screen.
>>>
>>>   
>>
>> Please mail me (privately) an 'objdump -Sr x86_emulate.o' from the 
>> kernel directory, so we can see where this happened.
>>
> 
> Ok.  Please try with the attached patch and let us know.  Also repeat 
> without the patch, so we can be sure it is easily reproducible.

Hi, the patch fixed the problem, thanks. It was 100% reproducible (Oops 
in 3 out of 3 attempts) and now it booted up.

Michal

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