snap-store unable to start after gnome upgrade to 3-38-2004

[Jorge Peinado]

When trying to start snap-store using the desktop icon, a general protection fault is reported in journalctl due to apparmor deniying access to some directories. This start to happen after Gnome was upgraded to 3-38-2004.

Journalctl logs:

ago 30 10:10:45 2021-EMEA-0145 systemd[2550]: Started Application launched by gnome-shell.
ago 30 10:10:45 2021-EMEA-0145 systemd[2550]: Started snap.snap-store.ubuntu-software.f7cceba9-aec4-4180-b2bb-a608f0b34401.scope.
ago 30 10:10:45 2021-EMEA-0145 systemd[2550]: gnome-launched-snap-store_ubuntu-software.desktop-7506.scope: Succeeded.
ago 30 10:10:45 2021-EMEA-0145 audit[7506]: SECCOMP auid=1001 uid=1001 gid=1001 ses=4 subj=? pid=7506 comm="snap-store" exe="/snap/snap-store/558/usr/bin/snap-store" sig=0 arch=c000003e sys>
ago 30 10:10:45 2021-EMEA-0145 kernel: audit: type=1326 audit(1661847045.830:62): auid=1001 uid=1001 gid=1001 ses=4 subj=? pid=7506 comm="snap-store" exe="/snap/snap-store/558/usr/bin/snap->
ago 30 10:10:45 2021-EMEA-0145 fwupd[7453]: 08:10:45:0919 FuEngine failed to record HSI attributes: failed to get historical attr: json-glib version too old
ago 30 10:10:45 2021-EMEA-0145 audit[1160]: USER_AVC pid=1160 uid=103 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/free>
                                             exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
ago 30 10:10:45 2021-EMEA-0145 audit: AUDIT1420 subj_apparmor=unconfined
ago 30 10:10:45 2021-EMEA-0145 audit[1160]: USER_AVC pid=1160 uid=103 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/free>
                                             exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
ago 30 10:10:45 2021-EMEA-0145 audit: AUDIT1420 subj_apparmor=unconfined
ago 30 10:10:45 2021-EMEA-0145 kernel: audit: type=1107 audit(1661847045.918:63): pid=1160 uid=103 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" >
                                        exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
ago 30 10:10:45 2021-EMEA-0145 kernel: audit: type=1420 audit(1661847045.918:64): subj_apparmor=unconfined
ago 30 10:10:45 2021-EMEA-0145 kernel: audit: type=1107 audit(1661847045.918:65): pid=1160 uid=103 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" >
                                        exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
ago 30 10:10:45 2021-EMEA-0145 kernel: audit: type=1420 audit(1661847045.918:66): subj_apparmor=unconfined
ago 30 10:10:47 2021-EMEA-0145 audit[7506]: AVC apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/gdm/greeter/applications/g>
ago 30 10:10:47 2021-EMEA-0145 kernel: audit: type=1400 audit(1661847047.462:67): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/us>
ago 30 10:10:47 2021-EMEA-0145 audit[7506]: AVC apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/gdm/greeter/applications/g>
ago 30 10:10:47 2021-EMEA-0145 kernel: audit: type=1400 audit(1661847047.486:68): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/us>
ago 30 10:10:47 2021-EMEA-0145 kernel: traps: snap-store[7506] general protection fault ip:7fa4dd0a531b sp:7ffefbb51500 error:0 in libxmlb.so.2.0.0[7fa4dd09f000+20000]
ago 30 10:10:47 2021-EMEA-0145 systemd[2550]: snap.snap-store.ubuntu-software.f7cceba9-aec4-4180-b2bb-a608f0b34401.scope: Succeeded.

[Michel-Ekimia (michel.ekimia)]

Thanks , very impacting users in daily task !

[Tommaso Diotalevi (tof1993)]

Since the last update, I am unable to lunch snap-store from my Ubuntu machine (20.04 LTS). Crashing at startup.

[Alexander B. (alex-b2022)]

i have exact the same problem with german version of ubuntu 20.04.
when start the snap-store in terminal the output is:

09:18:48:0099 Gtk Failed to load module "canberra-gtk-module"
09:18:48:0100 Gtk Failed to load module "canberra-gtk-module"
Speicherzugriffsfehler (Speicherabzug geschrieben)

tried remove and reinstall the snap-store, no improvement.
deleted the snap folder in the home directory also no improvement

[Michel-Ekimia (michel.ekimia)]

This should be Number 1 priority and I see that it is not even assigned ?

[Sergio Costas (rastersoft-gmail)]

This should be currently fixed in "edge". Can you test it?

[Jorge Peinado (jpeinado)]

Yes, it is fixed on the "edge" channel.
Thank you very much for your work.
Just as general information, for fixing it I did:

#snap refresh --edge snap-store