Bug#950684: systemd: upgrade fails in a chroot where /var/log/ owner is not root:root

[Félix Sipma]

Package: systemd
Version: 244.1-3
Severity: important

Following #950533, I also had a problem upgrading systemd in a chroot, where 
files in /, /var, /var/log are all owned by sbuild:sbuild. The upgrading script 
tried to create a dir /var/log/journal/, owned by root:root, and then failed 
without a lot of clues...

    $ sudo sbuild-update --upgrade unstable-amd64-sbuild
    I: 06ccache-tmpfs: Set cache size limit to 4.0 GB
    unstable-amd64-sbuild: Performing upgrade.
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    Calculating upgrade... Done
    The following packages have been kept back:
      binutils binutils-common binutils-x86-64-linux-gnu cpp-7 cpp-8 cpp-9 g++-9 gcc-7 gcc-7-base gcc-8
      gcc-8-base gcc-9 gcc-9-base libasan4 libasan5 libatomic1 libbinutils libc-dev-bin libc6 libc6-dev libcc1-0
      libcilkrts5 libgcc-7-dev libgcc-8-dev libgcc-9-dev libgcc1 libglib2.0-0 libgomp1 libitm1 liblsan0 libmpx2
      libp11-kit0 libquadmath0 libstdc++-9-dev libstdc++6 libtsan0 libubsan0 libubsan1 login passwd
    The following packages will be upgraded:
      systemd-sysv zlib1g
    2 upgraded, 0 newly installed, 0 to remove and 40 not upgraded.
    3 not fully installed or removed.
    Need to get 0 B/194 kB of archives.
    After this operation, 1024 B disk space will be freed.
    Setting up systemd (244.1-3) ...
    Detected unsafe path transition /var → /var/log during canonicalization of /var/log/journal.
    Detected unsafe path transition /var → /var/log during canonicalization of /var/log/journal.
    Detected unsafe path transition /var → /var/log during canonicalization of /var/log/journal.
    Detected unsafe path transition /var → /var/log during canonicalization of /var/log/journal.
    dpkg: error processing package systemd (--configure):
     installed systemd package post-installation script subprocess returned error exit status 73
    Errors were encountered while processing:
     systemd
    E: Sub-process /usr/bin/dpkg returned an error code (1)
    Exiting from upgrade with status 100.

I had to log in to the chroot, "chown sbuild:sbuild /var/log/journal/", and 
then the upgrade succeeded.



-- Package-specific info:

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'stable'), (100, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.4.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages systemd depends on:
ii  adduser          3.118
ii  libacl1          2.2.53-5
ii  libapparmor1     2.13.3-7
ii  libaudit1        1:2.8.5-2+b1
ii  libblkid1        2.34-0.1
ii  libc6            2.29-9
ii  libcap2          1:2.27-1
ii  libcryptsetup12  2:2.2.2-2
ii  libgcrypt20      1.8.5-3
ii  libgnutls30      3.6.11.1-2
ii  libgpg-error0    1.36-7
ii  libidn2-0        2.2.0-2
ii  libip4tc2        1.8.4-2
ii  libkmod2         26+20191223-1
ii  liblz4-1         1.9.2-2
ii  liblzma5         5.2.4-1+b1
ii  libmount1        2.34-0.1
ii  libpam0g         1.3.1-5
ii  libpcre2-8-0     10.34-7
ii  libseccomp2      2.4.2-2
ii  libselinux1      3.0-1
ii  libsystemd0      244.1-3
ii  mount            2.34-0.1
ii  util-linux       2.34-0.1

Versions of packages systemd recommends:
ii  dbus  1.12.16-2

Versions of packages systemd suggests:
ii  policykit-1        0.105-26
ii  systemd-container  244.1-3

Versions of packages systemd is related to:
pn  dracut           <none>
ii  initramfs-tools  0.136
pn  libnss-systemd   <none>
ii  libpam-systemd   244.1-3
ii  udev             244.1-3

-- Configuration Files:
/etc/systemd/logind.conf changed [not included]

-- no debconf information

-- 
Félix
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