Re: [Qemu-devel] [Bug ?]Qemu segfault because of non-initial kvm_state variable

[Paolo Bonzini]

On 03/03/2015 11:21, Peter Maydell wrote:
> On 3 March 2015 at 19:11, Paolo Bonzini <address@hidden> wrote:
>>
>>
>> On 03/03/2015 09:01, Gonglei (Arei) wrote:
>>> Hi,
>>>
>>> I encountered a Qemu segfault problem in my environment.
>>>
>>> # ./qemu-system-x86_64 -enable-kvm -m 4096 -smp 4 -name redhat6.2 -drive 
>>> file=/home/win2008_ent_r2_64_01,\
>>>  if=none,id=drive-ide0-0-0 -device 
>>> ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -vnc :10
>>> Segmentation fault
>>
>> Should be fixed by:
>>
>> diff --git a/kvm-all.c b/kvm-all.c
>> index 05a79c2..e04a0ca 100644
>> --- a/kvm-all.c
>> +++ b/kvm-all.c
>> @@ -1679,7 +1679,7 @@ void kvm_flush_coalesced_mmio_buffer(void)
>>  {
>>      KVMState *s = kvm_state;
>>
>> -    if (s->coalesced_flush_in_progress) {
>> +    if (!s || s->coalesced_flush_in_progress) {
>>          return;
>>      }
> 
> Is it worth my holding off on applying further pullreqs til
> we apply this fix to master (in the interests of future
> bisectability), or does it not affect many people/configs?

I've sent the patch as message-id
address@hidden now.  You can apply
it directly or I can send a pull request.

However, the patch depends on my other pending pull request ("[PULL
00/15] Misc changes for 2015-03-02").

Paolo