linux-kernel - Re: [PATCH v2 0/3] xen/netback: fix issue introduced recently

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Message-ID: <7fcb4be2-2c8c-dc17-3266-82c35a45eedd@suse.com>
Date:   Tue, 28 Mar 2023 15:57:05 +0200
From:   Jan Beulich <jbeulich@...e.com>
To:     Paolo Abeni <pabeni@...hat.com>
Cc:     Wei Liu <wei.liu@...nel.org>, Paul Durrant <paul@....org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        xen-devel@...ts.xenproject.org, stable@...r.kernel.org,
        Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2 0/3] xen/netback: fix issue introduced recently

On 28.03.2023 15:52, Paolo Abeni wrote:
> On Tue, 2023-03-28 at 15:10 +0200, Juergen Gross wrote:
>> The fix for XSA-423 introduced a bug which resulted in loss of network
>> connection in some configurations.
>>
>> The first patch is fixing the issue, while the second one is removing
>> a test which isn't needed. The third patch is making error messages
>> more uniform.
>>
>> Changes in V2:
>> - add patch 3
>> - comment addressed (patch 1)
> 
> I misread the thread on v2 as the build_bug_on() was not needed and
> applied such revision. 

I guess it's not the end of the world if we go forward without that extra
check. It's a safeguard for theoretical future work which, as Jürgen says,
isn't very likely to occur anyway.

Jan