linux-kernel - Re: Bug 216581 - Kernel panic on /init as busybox symbolic link with xen efi

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Date:   Wed, 19 Oct 2022 18:18:07 +0200 (CEST)
From:   denis.chancogne@...e.fr
To:     Thorsten Leemhuis <regressions@...mhuis.info>
Cc:     Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        regressions@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>,
        xen-devel@...ts.xenproject.org,
        Marek Marczykowski-Górecki 
        <marmarek@...isiblethingslab.com>
Subject: Re: Bug 216581 - Kernel panic on /init as busybox symbolic link
 with xen efi

>On 17.10.22 02:23, Marek Marczykowski-Górecki wrote:
>> On Sun, Oct 16, 2022 at 01:08:53PM +0200, Thorsten Leemhuis wrote:
>
>>>>  Denis Chancogne 2022-10-13 22:00:19 UTC
>>>>
>>>> when I start Xen 4.15.3 in efi with kernel 5.18.19, all works well;
>>>> but since kernel 5.19, I have a kernel panic on my /init process as
>>>> busybox symbolic link inside initramfs.
>>>>
>>>> This is the kernel log :
>> [...]
>> 
>> Thanks for forwarding.
>> 
>> This is already fixed on the Xen side: https://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=c3bd0b83ea5b7c0da6542687436042eeea1e7909
>> The commit is also in 4.15 branch already:
>> https://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=7923ea47e578bca30a6e45951a9da09e827ff028,
>> to be included in 4.15.4 rather soon.
>
>Hmmm. Well, strictly speaking this is still a kernel regression that
>should be fixed (or worked around) on the kernel level. But 5.19 is out
>for a while already and this afaics was the first report of this problem
>in kernel land. Maybe it's not worth it, so let's leave everything as it
>is for now, if that's okay for Denis. We IMHO will need to reconsider if
>more users run into this.
>
>Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
>
>#regzbot introduced: 8ad7e8f69695
>#regzbot invalid: it is a kernel regression, but one that can be worked
>around by updating Xen hypervisor

Hi all,
thanks a lot for your responses, it's very well for me.
I will wait for xen-4.15.4 to use latest kernel release.
Regards
Denis