On Sat, 25 Apr 2015 16:22:13 +0200 Michael Biebl <bi...@debian.org> wrote: > Package: cryptsetup > Version: 2:1.6.6-5 > Severity: grave > > Hi, > > if the cryptsetup package is installed, it also installed a > initramfs-tools hook. > > I use BUSYBOX=no in initramfs.conf, but the cryptroot hook copies > /bin/busybox to the initramfs nonetheless. > > As a result, the initramfs is unable to boot the system > > I'm getting > Begin: Running /scripts/init-bottom ... done > /init: exec: line 338: switch_root: not found > ...Kernel panic -n not syncing: Attempted to kill init > > > To reproduce the bug, make sure you have the "busybox" package installed > (which it is, by default), set BUSYBOX=n in > /etc/initramfs-tools/initramfs.conf and run "update-initramfs -u" and > reboot. >
I looked into this in more detail, and the culprit seems to be /usr/share/initramfs-tools/conf-hooks.d/cryptsetup which forcefully set's BUSYBOX=y. /usr/share/initramfs-tools/hooks/busybox will see the BUSYBOX=y setting and copy the busybox binary. /usr/share/initramfs-tools/hooks/zz-busybox sources /etc/initramfs-tools/initramfs.conf, therefor BUSYBOX=n will be set again, and the symlinks are not created. The result is a broken initramfs. I'm not sure, what is supposed to take precedence in such a case: The configuration in /etc/initramfs-tools/initramfs.conf or /usr/share/initramfs-tools/conf-hooks.d/cryptsetup and if it's a bug in cryptsetup which forcefully overrides BUSYBOX= or if it's a bug in busybox, which sources /etc/initramfs-tools/initramfs.conf in /usr/share/initramfs-tools/hooks/zz-busybox and therefor doesn't respect the settings which are set via conf-hooks.d. I've CCed the initramfs-tools and busybox maintainers for their input. If cryptsetup really requires busybox and forcefully sets BUSYBOX=y, why does the cryptsetup package not depend on busybox? I see several possible fixes here a/ /usr/share/initramfs-tools/hooks/zz-busybox doesn't source /etc/initramfs-tools/initramfs.conf directly and as a result respects settings from hooks directories. b/ /usr/share/initramfs-tools/conf-hooks.d/cryptsetup drops the BUSYBOX=y line. And if this is not an option, because cryptsetup requires busybox, then this should be reflected in the package dependencies accordingly by making the Recommends a Depends. -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth?
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