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Re: [Qemu-block] [PATCH] iotests: Fix CID for VMDK afl image

From: Max Reitz
Subject: Re: [Qemu-block] [PATCH] iotests: Fix CID for VMDK afl image
Date: Thu, 1 Feb 2018 18:59:29 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

On 2018-02-01 01:55, Fam Zheng wrote:
> On Thu, Feb 1, 2018 at 2:58 AM, Max Reitz <address@hidden> wrote:
>> On 2018-01-30 07:25, Fam Zheng wrote:
>>> This reverts commit 76bf133c4 which updated the reference output, and
>>> fixed the reference image, because the code path we want to exercise is
>>> actually the invalid image size.
>>> The descriptor block in the image, which includes the CID to verify, has 
>>> been
>>> invalid since the reference image was added. Since commit 9877860e7bd we 
>>> report
>>> this error earlier than the "file too large", so 059.out mismatches.
>>> The binary change is generated along the operations of:
>>>   $ bunzip2 afl9.vmdk.bz2
>>>   $ qemu-img create -f vmdk fix.vmdk 1G
>>>   $ dd if=afl9.vmdk.bz2 of=fix.vmdk bs=512 count=1 conv=notrunc
>>>   $ mv fix.vmdk afl9.vmdk
>>>   $ bzip2 afl9.vmdk
>>> Signed-off-by: Fam Zheng <address@hidden>
>>> ---
>>> v2: Fix commit message "qcow2 -> vmdk". [Kevin]
>>>     Revert 76bf133c4.
>> Hmmmm, now this fails again on my 32 bit build. :-(
>> The issue there is that you get a "Cannot allocate memory" when trying
>> to open the file.  My current fix was 2291712c39111a732 which simply
>> converted that to "Invalid argument", but now it's getting a bit more
>> complicated...  Should I just continue to play the game and check the
>> output for "Cannot allocate memory" and print exactly what the reference
>> output is expecting...?
> Ahhh. OK, then, with a big comment.
> I'd say let's just _notrun on 32 bit.

Sounds OK, but how would we test that? uname? Or just _notrun when we
see the ENOMEM message?


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