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apparmor blocks Tor Browser >= 10.5 starting with MOZ_ENABLE_WAYLAND set #591

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pabs3 opened this issue Jul 7, 2021 · 2 comments · Fixed by #593
Closed

apparmor blocks Tor Browser >= 10.5 starting with MOZ_ENABLE_WAYLAND set #591

pabs3 opened this issue Jul 7, 2021 · 2 comments · Fixed by #593

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@pabs3
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pabs3 commented Jul 7, 2021

Since Tor Browser 10.5 (release notes, tbb#31729) when the MOZ_ENABLE_WAYLAND environment variable is set, the Firefox build that is part of Tor Browser will try to use Wayland IPC and if that fails then Tor Browser will not start. The current torbrowser.Browser.firefox apparmor profile denies access to the relevant Wayland IPC files/sockets:

Jul 07 08:23:15 audit[437003]: AVC apparmor="DENIED" operation="mknod" profile="torbrowser_firefox" name="/dev/shm/wayland.mozilla.ipc.0" pid=437003 comm="Compositor" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

I was able to workaround this issue using this command:

sudo sh -c 'echo "owner /dev/shm/wayland.mozilla.ipc.[0-9]* rw," > /etc/apparmor.d/local/torbrowser.Browser.firefox ; apparmor_parser -r /etc/apparmor.d/torbrowser.Browser.firefox'
@pabs3 pabs3 mentioned this issue Jul 7, 2021
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@travankor
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Confirm this works as well. Do you mind sending a PR with the fix as well?
@pabs3
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pabs3 commented Jul 9, 2021 via email

travankor added a commit to travankor/torbrowser-launcher that referenced this issue Jul 10, 2021
@travankor
AppArmor: support Wayland display protocol
a4bc978 
When the environment variable MOZ_ENABLE_WAYLAND is set,
Firefox will try to use Wayland IPC sockets.

Closes torproject#591
@travankor travankor mentioned this issue Jul 10, 2021
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@pabs3 @travankor