Re: [Bug 273566] stray characters contaminate serial console

From: bob prohaska <fbsd@www.zefox.net>
To: freebsd-kernel@freebsd.org
Subject: Re: [Bug 273566] stray characters contaminate serial console

On Sun, Jan 12, 2025 at 05:02:15AM +0000, bugzilla-noreply@freebsd.org wrote:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273566
> 
> --- Comment #15 from Sulev-Madis Silber <bugs-freebsd-org916@ketas.si.pri.ee> ---
> you currently have more hw than i do, it's all connected up too. can you test
> it out more maybe? debugging kernels, etc. i should have multi arch usb/serial
> switched remote lab on my own but i don't somehow eh, despite using fbsd since 

Just for fun I installed a GENERIC-KASAN kernel on a Pi4 running -current,
but far as I can tell the problem doesn't exist on aarch64 or I don't know
how to see it. The Pi4 is providing terminal service to a Pi2 running armv7,
which since the KASAN kernel went on the Pi4 hasn't suffered a boot
stoppage. Neither have I seen any console messages on the Pi4 suggesting
something amiss. I'm guessing kasan simply generates warnings, but if so
I've not recognized any. I'll keep watching, it would really help to know 
what sort of behavior I'm looking for.

I tried to build a kasan kernel on a pi2 running armv7 but buildworld 
stopped with an unrecognized symbol. It's now building world/kernel with 
GENERIC as a sanity check, but the kasan man page suggests armv7 is 
unsupported.

If in fact armv7 does support kasan then I'll keep trying. Unfortunately 
I have only one kasan-supporting host presently but have couple spare
Pi2 v1.1 boxes that can run armv7 if it's relevant. 

Thanks for writing,

bob prohaska
ps, I was mistaken, there seems to be no freebsd-kernel mailing list 8-(