On 10/05/2017 12:43 AM, Andreas Schwab wrote:
On Okt 04 2017, John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx> 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
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