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Date:      Sat, 14 Mar 2026 11:54:34 -0400
From:      Michael Butler <imb@protected-networks.net>
To:        current@freebsd.org, Subbsd <subbsd@gmail.com>, freebsd-current Current <freebsd-current@freebsd.org>
Cc:        kib@freebsd.org
Subject:   Re: panic: supervisor write data, protection violation (vn_read/copyout_smap_erms?)
Message-ID:  <320b245d-85fb-49ba-9ef4-d5d335df39ed@protected-networks.net>
In-Reply-To: <abVvYHKqs-Mi7sPQ@albert.catwhisker.org>
References:  <CAFt_eMree8BYjJCJyr8po9TxkpT0ipQPy5C%2BCm_UCpM%2B5eCNLQ@mail.gmail.com> <d8132248-0e53-4c0d-bb6c-682995d09f02@protected-networks.net> <abVvYHKqs-Mi7sPQ@albert.catwhisker.org>

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On 3/14/26 10:23, David Wolfskill wrote:
> On Sat, Mar 14, 2026 at 09:28:53AM -0400, Michael Butler wrote:
>> To narrow this .. I can reliably start a kernel built at or before commit
>> 277830b4d3ae.
>>
>> On 3/14/26 09:06, Subbsd wrote:
>>> ...
>>> uname -a:
>>>
>>> FreeBSD host1.my.domain 16.0-CURRENT FreeBSD 16.0-CURRENT #0
>>> main-f91464171d61: Sat Mar 14 12:35:27 UTC 2026
>>> root@host1.my.domain:/usr/obj/usr/jails/src/src_16/src/amd64.amd64/sys/GENERIC
>>> amd64
>> ....
> 
> I updated my headless build machine from main-n284480-9a9f93bcf1aa to
> main-n284504-f91464171d61 this morning, but it panicked prior to
> completing the transition to multi-user mode.
> 
> Checking
> https://lists.freebsd.org/archives/dev-commits-src-main/2026-March/040570.html,
> blame is cast on 914a53570750; further in that thread, kib@ provides a
> tentative patch (but I have not tested it).

The patch at the end of this thread appears to solve the problem. Thanks!

	Michael


	



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