Public bug reported:
Am trying to get NTP to work with the kernel PPS subsystem, for high-
accuracy GPS-based clocks. On startup of NTPd I see this:
Apr 1 11:18:58 doorway kernel: [ 300.387443] audit: type=1400
audit(1459505938.042:9): apparmor="DENIED" operation="open"
profile="/usr/sbin/ntpd" name="/dev/pps0" pid=1668 comm="ntpd"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
Adding this to the usr.sbin.ntpd apparmor profile eliminated the error:
/dev/pps[0-9]* rw,
I'm not sure why ntpd needs *write* access to ppsN though, perhaps that can be
improved.
** Affects: ntp (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1564832
Title:
Apparmor profile for NTPd needs to allow read/write access to
/dev/ppsX
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