Re: [Qemu-stable] [PATCH for 2.11 0/2] QEMU crashes with CD device without media

[John Snow]

On 12/11/2017 05:24 AM, Denis V. Lunev wrote:
> On 11/28/2017 03:10 PM, Denis V. Lunev wrote:
>> There are 2 cases I have spotted so far:
>> 1) IDE ATAPI read processing. Actually this was reported from field
>> 2) QEMU IO hmp command (found during evaluation of (1))
>>
>> SCSI code checks during access that blk_is_available(). These patches add
>> same checks on different code paths.
>>
>> Pls decide whether these patches should go through sub-system trees or via
>> block tree.
>>
>> Signed-off-by: Denis V. Lunev <address@hidden>
>> CC: "Dr. David Alan Gilbert" <address@hidden>
>> CC: John Snow <address@hidden>
>> CC: Kevin Wolf <address@hidden>
>> CC: Stefan Hajnoczi <address@hidden>
>>
> any decision on this?
> 

Hi Den, I was investigating it and had a long reply typed out but I
didn't want to bore you to tears with my badly written novel. I'll send
it shortly.

I couldn't reproduce the problem and I can't see how the behavior you
are seeing is possible, so I am concerned about the root cause of what's
wrong.

I will accept the hotfix before 2.12-rc0 or 2.11.1, but I want to try
and see what's going wrong in the meantime.