profile="lxc-container-default-cgns"
profile lxc-container-default-cgns flags=(attach_disconnected,mediate_deleted) {
#include <abstractions/lxc/container-base>
# the container may never be allowed to mount devpts. If it does, it
# will remount the host's devpts. We could allow it to do it with
# the newinstance option (but, right now, we don't).
deny mount fstype=devpts,
mount fstype=cgroup -> /sys/fs/cgroup/**,
mount fstype=cgroup2 -> /sys/fs/cgroup/**,
}
__
> flags are being used by the mount(2) system call that's failed
Pardon my ignorance as not being sure what you are asking here. I
thought it was obvious from the log
pid=8426 comm="(networkd)" flags="rw, rslave"
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https://bugs.launchpad.net/bugs/1811248
Title:
systemd--networkd mounts denied for lxc guest
Status in apparmor package in Ubuntu:
New
Bug description:
Host unbuntu cosmic | lxc 3.0.3 | aa 2.12 | systemd 239-7
Guest Arch Linux | systemd 240.0
After having upgraded in the guest systemd from 239.370 to 240.0 the
host's AA is exhibiting
> audit: type=1400 audit(1547125168.853:722): apparmor="DENIED"
operation="mount" info="failed flags match" error=-13 profile="lxc-
container-default-cgns" name="/" pid=8426 comm="(networkd)" flags="rw,
rslave"
and the guest
> systemd-networkd.service: Failed to set up mount namespacing: Permission
denied
> systemd-networkd.service: Failed at step NAMESPACE spawning
/usr/lib/systemd/systemd-networkd: Permission denied
According to lxc bug tracker https://github.com/lxc/lxc/issues/2778
> While we'd like to allow such mounts we cannot do so until the
apparmor_parser is fixed to handle them correctly.
other cross references
https://github.com/systemd/systemd/issues/11371
https://bugs.archlinux.org/task/61313
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