This bug was fixed in the package firefox - 95.0+build1-0ubuntu0.20.04.1
---------------
firefox (95.0+build1-0ubuntu0.20.04.1) focal; urgency=medium
* New upstream release (95.0+build1)
[ Rico Tzschichholz ]
* Bump build-dep on cargo >= 0.54
- debian/control{,.in}
- debian/patches/relax-cargo-dep.patch
* Update patches
- debian/patches/armhf-rustc-thin-lto.patch
* Pass --without-wasm-sandboxed-libraries
- debian/config/mozconfig.in
* Install more sizes of the firefox application icon
- debian/build/rules.mk
* Bump dump_sys to bf7f6bd855eb6ecb233b52bfa7b2c975b7026540 (LP: #1945770)
- debian/build/create-tarball.py
-- Olivier Tilloy <olivier.til...@canonical.com> Wed, 01 Dec 2021
10:22:52 +0100
** Changed in: firefox (Ubuntu Focal)
Status: Fix Committed => Fix Released
** Changed in: firefox (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1931602
Title:
[apparmor] Segfault in logs with apparmor enabled
Status in firefox package in Ubuntu:
Fix Released
Status in firefox source package in Bionic:
Fix Released
Status in firefox source package in Focal:
Fix Released
Status in firefox source package in Hirsute:
Fix Released
Status in firefox source package in Impish:
Fix Released
Bug description:
[Impact]
* With apparmor enabled (and usr.bin.firefox in enforce mode) there
is a crash happening every time right after launching Firefox.
[Test Plan]
* sudo aa-enforce /etc/apparmor.d/usr.bin.firefox
* launch Firefox
* See a similar segfault reported in the syslog:
Jun 10 17:25:40 ubuntu kernel: [ 86.775837] firefox[1765]: segfault at 0 ip
00007f724dd06384 sp 00007fffa7aec450 error 6 in libxul.so[7f724a483000+53b2000]
Jun 10 17:25:40 ubuntu kernel: [ 86.775843] Code: 00 0f 1f 44 00 00 50 80
3d f8 56 4c 04 00 74 02 58 c3 c6 05 ed 56 4c 04 01 48 8d 05 24 2c fa 02 48 8b
0d 77 f0 3a 04 48 89 01 <c7> 04 25 00 00 00 00 8d 01 00 00 e8 74 63 78 fc 66 2e
0f 1f 84 00
[Where problems could occur]
The fix adds additional paths to firefox apparmor profile (e.g. affecting
/sys/devices/pci* and RealtimeKit1). When using deb version of firefox the
browser may chose a different code path to execute than before, so it may
affect hw acceleration (the sysfs paths were used by libxul) and audio.
Maybe rendering artifacts and audio sync issues in videos.
[Other Info]
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1931602/+subscriptions
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