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Re: [Qemu-block] [Qemu-devel] Supplying QCOW2 as 'file' driver to `block

From: Eric Blake
Subject: Re: [Qemu-block] [Qemu-devel] Supplying QCOW2 as 'file' driver to `blockdev-add` results in a QEMU crash
Date: Wed, 15 Jun 2016 09:38:56 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

On 06/15/2016 09:17 AM, Max Reitz wrote:
> On 15.06.2016 11:58, Kashyap Chamarthy wrote:
>> Seems like supplying "qcow2" file BlockdevDriver option to QMP
>> `blockdev-add` results in a SIGSEGV:
>>      [...]
>>     Thread 1 "qemu-system-x86" received signal SIGSEGV, Segmentation fault.
>>     0x0000555555a0121f in visit_type_BlockdevRef ()
>>      [...]
>> Reproducer
>> ----------
> Even simpler reproducer:
> {'execute':'blockdev-add','arguments':{'options':{'driver':'raw'}}}
> Seems like a QAPI problem to me, and bisecting yields
> dbf11922622685934bfb41e7cf2be9bd4a0405c0 as the culprit.

I'm looking into it. Thanks for the testcase.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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