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Date:      Mon, 16 Sep 2024 23:19:18 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 281524] msdosfs error over USB causes a kernel panic
Message-ID:  <bug-281524-3630-vOW4PAjfjX@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-281524-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-281524-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281524

--- Comment #3 from Tomasz "CeDeROM" CEDRO <tomek@cedro.info> ---
Thanks Carl, good to hear a temporary solution was found :-)

The problem is still here, and FreeBSD should handle it gracefully, so the =
fix
is needed :-)

I would also suggest reporting an issue on CP GitHub - as you have the devi=
ce
you have the details to fill in the report - you can point the problem is
somewhere around Win95 extended attributes.

https://github.com/adafruit/circuitpython/issues

Someone with a JTAG/SWD debug probe attached to the rPI with CP running and
mounted on FreeBSD should catch the problem in the CP firmware. I don't have
that board sorry but I guess out of bounds memory write happens causing boa=
rd
panic and then BSD host panic. This is interesting to verify BSD msdosfs / =
fs
driver cannot be manipulated by forged FAT device.

One more question - just to eliminate some "background writes" - no problem
occurred in terminal with no Xorg or you were working on the Xorg desktop?

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