netdev - Re: Xen + linux 6.1.0-rc8, network to guest VM not working after commit ad7f402ae4f466647c3a669b8a6f3e5d4271c84a fixing XSA-423

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Thu, 8 Dec 2022 19:31:40 +0100
From:   Sander Eikelenboom <linux@...elenboom.it>
To:     Andrew Cooper <Andrew.Cooper3@...rix.com>,
        Ross Lagerwall <ross.lagerwall@...rix.com>,
        Juergen Gross <jgross@...e.com>,
        Xen-devel <xen-devel@...ts.xen.org>, Paul Durrant <paul@....org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: Xen + linux 6.1.0-rc8, network to guest VM not working after
 commit ad7f402ae4f466647c3a669b8a6f3e5d4271c84a fixing XSA-423

On 08/12/2022 00:00, Andrew Cooper wrote:
> On 07/12/2022 21:42, Sander Eikelenboom wrote:
>> Hi Ross / Juergen,
>>
>> I just updated my linux kernel to the latest of Linus his tree which
>> included commit ad7f402ae4f466647c3a669b8a6f3e5d4271c84a fixing XSA-423.
>>
>> Unfortunately when using this kernel I can't SSH anymore into the Xen
>> guest I start, but I don't see any apparent failures either.
>> A straight revert of the commit
>> ad7f402ae4f466647c3a669b8a6f3e5d4271c84a makes networking function
>> normally again.
>>
>> I have added some of the logging below, perhaps it at gives some idea
>> off the state around the Xen network front and backend.
>>
>> Any ideas or a test patch that I could run to shed some more light on
>> what is going on ?
> 
> XSA-423 was buggy.  Fix and discussion at:
> 
> https://lore.kernel.org/xen-devel/681773dd-6264-63ac-a3b5-a9182b9e0cc1@suse.com/T/#t
> 
> ~Andrew

Thanks for the pointer Andrew, that fix works for me as well!
What a difference a few characters can make :)

--
Sander