NetworkManager service crash on recent all snaps images

[Jonathan Cave]

NetworkManager service appears to crash when left running for a period of time on all-snaps images. Result is loss of network address on the interfaces managed.

Running with snapd from master on 20/10/2016.

snap list:
Name Version Rev Developer Notes
bluez 5.37-1 6 canonical -
checkbox-plano 21~s16 1 ce-certification-qa devmode
cloud-led 1 x1 -
core 16.04.1 72 canonical -
modem-manager 1.4.0-1 1 canonical -
network-manager 1.2.2-6 31 canonical -
snapweb 0.21 18 canonical -
stlouis 16.04-1.5 2 canonical -
stlouis-kernel 4.4.0-38-4 1 canonical -
tpm 1.2-3 9 canonical -
uefi-fw-tools 1.1-0.7.2+git 1 canonical -

[Simon Fels (morphis)]

The relevant part out of the log from above is

Oct 19 13:00:57 localhost NetworkManager[1527]: <warn> [1476882057.1364] settings: couldn't set the system hostname to '10-155-115-54.conference' using hostnamed: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: An AppArmor policy prevents this sender from sending this message to this recipient; type="method_call", sender=":1.9" (uid=0 pid=1527 comm="/snap/network-manager/31/usr/sbin/NetworkManager -") interface="org.freedesktop.hostname1" member="SetHostname" error name="(unset)" requested_reply="0" destination=":1.6" (uid=0 pid=1319 comm="/lib/systemd/systemd-hostnamed ")
Oct 19 13:00:57 localhost kernel: [ 46.972759] audit: type=1326 audit(1476882057.129:58): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=1527 comm="NetworkManager" exe="/snap/network-manager/31/usr/sbin/NetworkManager" sig=31 arch=c000003e syscall=170 compat=0 ip=0x7f3119a22c17 code=0x0

The seccomp denial makes NetworkManager restart.

[Simon Fels (morphis)]

Fix for snapd https://github.com/snapcore/snapd/pull/2204

[Simon Fels (morphis)]

Asked core team to get the fix in for the final release this week.