Re: Which qemu change corresponds to RedHat bug 1655408

From: Jakob Bohm <jb-gnumlists@wisemo.com>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>,
	qemu-discuss@nongnu.org, qemu-devel <qemu-devel@nongnu.org>,
	Qemu-block <qemu-block@nongnu.org>,
	"John Snow" <jsnow@redhat.com>
Subject: Re: Which qemu change corresponds to RedHat bug 1655408
Date: Thu, 8 Oct 2020 18:49:14 +0200	[thread overview]
Message-ID: <43072820-c04f-b706-4b37-2d2e37e8499f@wisemo.com> (raw)
In-Reply-To: <653b9595-ae60-181a-2975-2e351ade9788@redhat.com>

(Top posting because previous reply did so):

If the bug was closed as "can't reproduce", why was a very similar bug 
listed as fixed in RHSA-2019:2553-01 ?

On 2020-10-08 18:41, Philippe Mathieu-Daudé wrote:
> Hi Jakob,
> 
> On 10/8/20 6:32 PM, Jakob Bohm wrote:
>> Red Hat bugzilla bug 1655408 against qemu is listed by Red Hat as fixed in
>> April 2019, but I cannot find the corresponding change on qemu.org (the
>> Changelog in the wiki is not a traditional changelog and doesn't cover
>> bugfix releases such as 5.0.1, the git commit log is too detailed to
>> search, the Red Hat bugzilla and security advisory pages do not link
>> red hat bugs back to upstream (launchpad) bugs or git changes.
>>
>> Here is the bug title (which also affects my Debian packaged qemu 5.0):
>>
>> VM can not boot up due to "Failed to lock byte 100" if cdrom has been
>> mounted on the host
>>
>> Further observation:
>>
>> The basic problem is that qemu-system refuses to start with the error
>> message "Failed to lock byte 100" when -drive points to a read-only
>> ISO file.  For the reporter of the Red Hat bug, that was a mount-induced
>> read-only condition, in my case it is an NFS mount of a read-only
>> directory.
>>
>> The error message itself seams meaningless, as there is no particular
>> reason to request file locks on a read-only raw disk image.
>>
>> my qemu-system-x86_64 invocation contains the option (on one line):
>>
>> -drive if=none,id=drive-ide0-1-0,readonly=on,
>> file=/mnt/someshare/path/gparted-live-1.1.0-5-amd64.iso,format=raw
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1655408 has been
> closed due to lack of reproducer. Can you amend your information
> to the BZ? It will likely be re-opened. Thanks!
> 
>>
>> Enjoy
>>
>> Jakob
>> -- 
>> Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
>> Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
>> This public discussion message is non-binding and may contain errors.
>> WiseMo - Remote Service Management for PCs, Phones and Embedded
>>
> 

Enjoy

Jakob
-- 
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
This public discussion message is non-binding and may contain errors.
WiseMo - Remote Service Management for PCs, Phones and Embedded