Ubuntu
lightdm package

AppArmor denials when logging out of guest session

Bug #1304015 reported by Tyler Hicks
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
lightdm (Ubuntu)
Fix Released
High
Tyler Hicks

Bug Description

The fix for bug #1298611 was incomplete as far as AppArmor mediation of signals. Specifically, when logging out of the guest session, AppArmor is now denying kill signals to guest session processes:

apparmor="DENIED" operation="signal" profile="/usr/lib/lightdm/lightdm-guest-session" pid=2746 comm="killall" requested_mask="receive" denied_mask="receive" signal=kill peer="unconfined"

The lightdm abstraction should allow guest session processes to receive signals from unconfined processes.

Related branches

lp:~tyhicks/lightdm/guest-session-policy-updates
PS Jenkins bot: Approve (continuous-integration)
Robert Ancell: Needs Fixing
Diff: 53 lines (+28/-0)
2 files modified
data/apparmor/abstractions/lightdm (+8/-0)
debian/changelog (+20/-0)
Revision history for this message
Tyler Hicks (tyhicks) wrote :

This bug was fixed in lightdm 1.9.15-0ubuntu1

Changed in lightdm (Ubuntu):
status: In Progress → Fix Released
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