Suddenly, the telegram snap is not working for me anymore:
$ telegram-desktop
cannot perform operation: mount --rbind /mnt /tmp/snap.rootfs_5jdjBi//mnt: Permission denied
These are the denials I see in dmesg:
[ 2539.315761] audit: type=1400 audit(1568098412.605:293): apparmor="DENIED" operation="mount" info="failed srcname match" error=-13 profile="/usr/lib/snapd/snap-confine" name="/tmp/snap.rootfs_hmvqx8/mnt/" pid=16061 comm="snap-confine" srcname="/mnt/" flags="rw, rbind"
[ 2541.399341] audit: type=1400 audit(1568098414.689:294): apparmor="DENIED" operation="mount" info="failed srcname match" error=-13 profile="/usr/lib/snapd/snap-confine" name="/tmp/snap.rootfs_HyS0Xh/mnt/" pid=16077 comm="snap-confine" srcname="/mnt/" flags="rw, rbind"
All plugs are connected:
$ snap connections telegram-desktop
Interface Plug Slot Notes
content[gtk-3-themes] telegram-desktop:gtk-3-themes gtk-common-themes:gtk-3-themes -
content[icon-themes] telegram-desktop:icon-themes gtk-common-themes:icon-themes -
content[sound-themes] telegram-desktop:sound-themes gtk-common-themes:sound-themes -
desktop telegram-desktop:desktop :desktop -
desktop-legacy telegram-desktop:desktop-legacy :desktop-legacy -
gsettings telegram-desktop:gsettings :gsettings -
home telegram-desktop:home :home -
network telegram-desktop:network :network -
network-bind telegram-desktop:network-bind :network-bind -
network-manager telegram-desktop:network-manager :network-manager manual
pulseaudio telegram-desktop:pulseaudio :pulseaudio -
removable-media telegram-desktop:removable-media :removable-media manual
unity7 telegram-desktop:unity7 :unity7 -
Edited to add debugging information:
$ ls -l /etc/apparmor.d/*snap-confine*
-rw-r--r-- 1 root root 22019 jul 11 2018 /etc/apparmor.d/snap.core.5001.usr.lib.snapd.snap-confine
-rw-r--r-- 1 root root 17342 sep 11 2017 /etc/apparmor.d/usr.lib.snapd.snap-confine
-rw-r--r-- 1 root root 23754 jul 12 10:40 /etc/apparmor.d/usr.lib.snapd.snap-confine.real
$ apt-cache policy snapd
snapd:
Instalados: 2.40+18.04
Candidato: 2.40+18.04
Tabla de versión:
*** 2.40+18.04 500
500 http://es.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
100 /var/lib/dpkg/status
2.37.4+18.04.1 500
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
2.32.5+18.04 500
500 http://es.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
snapd journal: https://paste.ubuntu.com/p/wHsRR4R2xD/
content of /etc/apparmor.d/usr.lib.snapd.snap-confine: https://paste.ubuntu.com/p/6vZtGYz8RH/