Re: 14.3 panics: supervisor write data, page not present

Reply: J.R. Oldroyd: "Re: 14.3 panics: supervisor write data, page not present"
In reply to: J.R. Oldroyd: "14.3 panics: supervisor write data, page not present"
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From: Eugene Grosbein <eugen_at_grosbein.net>
Date: Thu, 28 Aug 2025 21:25:40 UTC

29.08.2025 1:49, J.R. Oldroyd wrote:

> Upgraded server from 14.2 to 14.3-p2 last weekend.
> 
> Since then panics and reboots every couple of nights.
> 
> System was rock-solid stable on 14.2 and many earlier kernels too.
> 
> Upgrade was routine upgrade using freebsd-update.  No hardware changes.
> 
> Dumps:
> [1] 2025/08/26
>     https://opal.com/~jr/freebsd/14.3-panics/20250826053638-panic.txt
> 
> [2] 2025/08/28
>     https://opal.com/~jr/freebsd/14.3-panics/20250828032438-panic.txt
> 
> In both cases, curthread() in /usr/src/sys/amd64/include/pcpu_aux.h
> seems to be where things go wrong.

First thing to do is update CPU microcode as part of BIOS/UEFI firmware update
or just OS-level CPU microcode update.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261169