AppArmor denied opening /dev/shm/lttng-ust-wait*

[Alejandro J. Cura]

When running under the Unity8 desktop session, the kernel log is spammed with apparmor messages coming from the webbrowser app profile, the same four lines every 5 seconds:

$ dmesg -w
[...]
[85560.662068] audit: type=1400 audit(1469629097.571:50068): apparmor="DENIED" operation="open" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-6-1000" pid=17206 comm="QQmlThread" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000
[85560.662124] audit: type=1400 audit(1469629097.571:50069): apparmor="DENIED" operation="open" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-6" pid=17205 comm="QQmlThread" requested_mask="r" denied_mask="r" fsuid=1000 ouid=119
[85560.662173] audit: type=1400 audit(1469629097.571:50070): apparmor="DENIED" operation="open" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-6-1000" pid=17206 comm="QQmlThread" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000
[85560.662221] audit: type=1400 audit(1469629097.571:50071): apparmor="DENIED" operation="open" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-6" pid=17205 comm="QQmlThread" requested_mask="r" denied_mask="r" fsuid=1000 ouid=119

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Olivier Tilloy (osomon)]

Possibly related to an old bug: bug #1404302.

[Pat McGowan (pat-mcgowan)]

The old bug was about errors reported in the apps logs. This is related to logging into syslog.
I also see this on a core system. I only see reports related to the browser or webapps.
Could something have changed or be missing in the apparmor profile? or some configuration in the browser enabling this?