[pkg-apparmor] Bug#909523: cachefilesd broken by apparmor

[Anthony DeRobertis]

Package: cachefilesd
Version: 0.10.10-0.1
Severity: important

Important since Apparmor is on by default now.

I rebooted after enabling Apparmor, and cachefilesd wouldn't start:

Sep 24 13:53:17 Zia cachefilesd[1105]: About to bind cache
Sep 24 13:53:17 Zia kernel: CacheFiles: Security denies permission to nominate security context: error -2
Sep 24 13:53:17 Zia cachefilesd[1105]: CacheFiles bind failed: errno 2 (No such file or directory)
Sep 24 13:53:17 Zia cachefilesd[1052]: Starting FilesCache daemon : cachefilesd failed!
Sep 24 13:53:17 Zia systemd[1]: cachefilesd.service: Control process exited, code=exited status=1
Sep 24 13:53:17 Zia systemd[1]: cachefilesd.service: Failed with result 'exit-code'.
Sep 24 13:53:17 Zia systemd[1]: Failed to start LSB: CacheFiles daemon.


Trying a few more times (after the system booted) also produced the same error each time:

Sep 24 13:57:12 Zia systemd[1]: Starting LSB: CacheFiles daemon...
Sep 24 13:57:13 Zia cachefilesd[6213]: About to bind cache
Sep 24 13:57:13 Zia cachefilesd[6213]: CacheFiles bind failed: errno 2 (No such file or directory)
Sep 24 13:57:13 Zia kernel: CacheFiles: Security denies permission to nominate security context: error -2
Sep 24 13:57:13 Zia cachefilesd[6208]: Starting FilesCache daemon : cachefilesd failed!
Sep 24 13:57:13 Zia systemd[1]: cachefilesd.service: Control process exited, code=exited status=1
Sep 24 13:57:13 Zia systemd[1]: cachefilesd.service: Failed with result 'exit-code'.
Sep 24 13:57:13 Zia systemd[1]: Failed to start LSB: CacheFiles daemon.

Rebooting with apparmor=0 on the kernel command line makes it work
again.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'testing'), (200, 'unstable'), (150, 'stable'), (100, 'experimental'), (1, 'experimental-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.18.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en_GB (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages cachefilesd depends on:
ii  libc6  2.27-6

cachefilesd recommends no packages.

cachefilesd suggests no packages.

-- Configuration Files:
/etc/cachefilesd.conf changed [not included]
/etc/default/cachefilesd changed [not included]
/etc/init.d/cachefilesd changed [not included]
/etc/logcheck/ignore.d.workstation/cachefilesd [Errno 13] Permission denied: '/etc/logcheck/ignore.d.workstation/cachefilesd'

-- no debconf information