Re: [PATCH-for-6.2 0/2] hw/block/fdc: Fix CVE-2021-3507

[Jon Maloy <jmaloy@redhat.com>]

On 3/10/22 12:14, Thomas Huth wrote:
> On 06/02/2022 20.19, Jon Maloy wrote:
>> Trying again with correct email address.
>> ///jon
>>
>> On 2/6/22 14:15, Jon Maloy wrote:
>>>
>>>
>>> On 1/27/22 15:14, Jon Maloy wrote:
>>>>
>>>> On 11/18/21 06:57, Philippe Mathieu-Daudé wrote:
>>>>> Trivial fix for CVE-2021-3507.
>>>>>
>>>>> Philippe Mathieu-Daudé (2):
>>>>>    hw/block/fdc: Prevent end-of-track overrun (CVE-2021-3507)
>>>>>    tests/qtest/fdc-test: Add a regression test for CVE-2021-3507
>>>>>
>>>>>   hw/block/fdc.c         |  8 ++++++++
>>>>>   tests/qtest/fdc-test.c | 20 ++++++++++++++++++++
>>>>>   2 files changed, 28 insertions(+)
>>>>>
>>>> Series
>>>> Acked-by: Jon Maloy <jmaloy@redhat.com>
>>>
>>> Philippe,
>>> I hear from other sources that you earlier have qualified this one 
>>> as "incomplete".
>>> I am of course aware that this one, just like my own patch, is just 
>>> a mitigation and not a complete correction of the erroneous 
>>> calculation.
>>> Or did you have anything else in mind?
>
> Any news on this one? It would be nice to get the CVE fixed for 7.0 ?
>
>  Thomas
>
The ball is currently with John Snow, as I understand it.
The concern is that this fix may not take the driver back to a 
consistent state, so that we may have other problems later.
Maybe Philippe can chip in with a comment here?

///jon