On 10/05/2017 12:43 AM, Andreas Schwab wrote:
> On Okt 04 2017, John Paul Adrian Glaubitz <glaub...@physik.fu-berlin.de> 
> wrote:
> 
>> Ok, switching just the initrd to the one from 4.13 while keeping the 4.12 
>> kernel
>> image results in the same crash. Maybe the glibc is broken?
> 
> It's busybox.  Try setting BUSYBOX=n in
> /etc/initramfs-tools/initramfs.conf (or deinstall busybox).

Indeed. I also just found that out.

> $ busybox ash -c 'echo ${x}'
> ash: syntax error: missing '}'

Thanks. That's a very handy testcase.

busybox has gotten new maintainers in Debian and they have stripped
"-O2" from CFLAGS so that it's building with "-Os" now [1].

Maybe that caused the code to be miscompiled. I hope I won't have
to bisect busybox.

Adrian

> [1] 
> https://anonscm.debian.org/cgit/d-i/busybox.git/commit/?id=8a115a910fb3cd7a525972e150a32f8aeb1da492

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaub...@debian.org
`. `'   Freie Universitaet Berlin - glaub...@physik.fu-berlin.de
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