From mboxrd@z Thu Jan  1 00:00:00 1970
From: Finn Thain <fthain@linux-m68k.org>
Subject: Re: Kernel stack read with PTRACE_EVENT_EXIT and io_uring threads
Date: Wed, 16 Jun 2021 10:23:41 +1000 (AEST)
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To: "Eric W. Biederman" <ebiederm@xmission.com>, Michael Schmitz <schmitzmic@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>, linux-arch <linux-arch@vger.kernel.org>, Jens Axboe <axboe@kernel.dk>, Oleg Nesterov <oleg@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Richard Henderson <rth@twiddle.net>, Ivan Kokshaysky <ink@jurassic.park.msu.ru>, Matt Turner <mattst88@gmail.com>, alpha <linux-alpha@vger.kernel.org>, Geert Uytterhoeven <geert@linux-m68k.org>, linux-m68k <linux-m68k@lists.linux-m68k.org>, Arnd Bergmann <arnd@kernel.org>, Ley Foon Tan <ley.foon.tan@intel.com>, Tejun Heo <tj@kernel.org>, Kees Cook <keescook@chromium.org>, John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>

On Wed, 16 Jun 2021, Michael Schmitz wrote:

> > 
> > Do you happen to know if there is userspace that will run in 
> > qemu-system-m68k that can be used for testing?
> 
> I surmise so. I don't use qemu myself - either ARAnyM, or actual 
> hardware. Hardware is limited to 14 MB RAM, which has prevented me from 
> using more than simple regression testing. In particular, I can't test 
> sys_io_uring_setup there.
> 
> Adrian uses qemu a lot, and has supplied disk images to work from on 
> occasion. Maybe he's got something recent enough to support 
> sys_io_uring_setup ... I've CC:ed him in, as I'd love to do some more 
> testing as well.
> 

As well as Debian/m68k, there is also a Gentoo/m68k stage3 rootfs 
available here: 
https://sourceforge.net/projects/linux-mac68k/files/Gentoo%20m68k%20unauthorized/

I built that rootfs last year using Catalyst. Some background (including 
the qemu-system-m68k command-line) can be found here:
https://forums.gentoo.org/viewtopic-t-1100780.html