Bug#756340: [systemd] Boot stops with certain (valid) tmpfs entries in /etc/fstab

[gisl at leonde.de]

Package: systemd
Version: 208-6
Severity: important

--- Please enter the report below this line. ---

I had the following two lines in my /etc/fstab and these caused systemd to not 
boot anymore.

tmpfs /var/run tmpfs defaults,relatime,mode=1777 0 0
tmpfs /var/lock tmpfs defaults,relatime,mode=1777 0 0

It complained about /run/systemd/private not being available and indeed the 
system dbus was not started. With an older kernel (3.12) I got it to get kdm 
started, but I could not enter my password, it simply did not accept any 
keyboard input. Switching to the console only worked thanks to the menu option 
in kdm that I could activate with the mouse.

I couldn't install or configure certain new packages, because their post-
install scripts again failed due to the missing dbus socket. So after trying 
to install sysvinit-core and rebooting, booting failed even harder, apparently 
because of missing /bin/init. I could only fix this in grub with init=/bin/bash

After searching for similar problems on a second computer, I found those boot-
bugs with encrypted and nfts filesystems in /etc/fstab which brought me into 
commenting out the tmpfs lines.

So there's a few problems here:
- systemd does not know how to deal with certain entries in fstab (somewhat 
OK)
- systemd does not report or log any error about that (NOT OK)
- systemd breaks the entire system instead of just skipping those entries (NOT 
OK)
- systemd did not allow me to manually start dbus (NOT OK)
- (this might go to a different report): packages should be installable without 
dbus being available

I fixed the problem by (re-)installing systemd-shim and systemd-sysv

Thanks
Carsten

PS: yes, I noticed that the tmpfs lines are superfluous by now, since they can 
be managed through /etc/default/tmpfs. That was not possible when I had added 
them.

--- System information. ---
Architecture: amd64
Kernel:       Linux 3.14-2-amd64

Debian Release: jessie/sid
  500 unstable        www.deb-multimedia.org 
  500 unstable        ftp.de.debian.org 
  500 stable          security.debian.org 
    1 experimental    ftp.de.debian.org 

--- Package information. ---
Depends                                (Version) | Installed
================================================-+-=========================
libacl1                            (>= 2.2.51-8) | 
libaudit1                           (>= 1:2.2.1) | 
libblkid1                            (>= 2.17.2) | 
libc6                                  (>= 2.17) | 
libcap2                                (>= 2.10) | 
libcryptsetup4                      (>= 2:1.4.3) | 
libdbus-1-3                           (>= 1.1.1) | 
libgcrypt11                           (>= 1.5.1) | 
libkmod2                                 (>= 5~) | 
liblzma5                (>= 5.1.1alpha+20120614) | 
libpam0g                           (>= 0.99.7.1) | 
libselinux1                           (>= 2.1.9) | 
libsystemd-daemon0                     (= 208-6) | 
libsystemd-journal0                    (= 208-6) | 
libudev1                                (>= 189) | 
libwrap0                             (>= 7.6-4~) | 
libsystemd-login0                      (= 208-6) | 
util-linux                         (>= 2.19.1-2) | 
initscripts                      (>= 2.88dsf-17) | 
sysv-rc                                          | 
udev                                             | 
acl                                              | 
adduser                                          | 
libcap2-bin                                      | 


Recommends          (Version) | Installed
=============================-+-===========
libpam-systemd                | 208-6


Suggests        (Version) | Installed
=========================-+-===========
systemd-ui                |