** Tags added: focal
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https://bugs.launchpad.net/bugs/2017011
Title:
[snap] unable to read /proc/pressure/{cpu,io,memory}
Status in chromium-browser package in Ubuntu:
Triaged
Bug description:
During normal operation, chromium wants to read
/proc/pressure/{cpu,io,memory} but is denied by the Apparmor policy:
$ journalctl -b0 -k --grep 'chromium.chromium' | grep -F
'name="/proc/pressure/'
Apr 19 10:40:27 sdeziel-lemur kernel: audit: type=1400
audit(1681915227.726:817): apparmor="DENIED" operation="open" class="file"
profile="snap.chromium.chromium" name="/proc/pressure/cpu" pid=395005
comm="ThreadPoolForeg" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Apr 19 10:40:27 sdeziel-lemur kernel: audit: type=1400
audit(1681915227.726:818): apparmor="DENIED" operation="open" class="file"
profile="snap.chromium.chromium" name="/proc/pressure/io" pid=395005
comm="ThreadPoolForeg" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Apr 19 10:40:27 sdeziel-lemur kernel: audit: type=1400
audit(1681915227.726:819): apparmor="DENIED" operation="open" class="file"
profile="snap.chromium.chromium" name="/proc/pressure/memory" pid=395005
comm="ThreadPoolForeg" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Note that simply starting the browser doesn't prompt it try and read
those files, you need to do something more involving like watching
Youtube for example.
Additional information:
$ snap list chromium core20
Name Version Rev Tracking Publisher Notes
chromium 112.0.5615.49 2424 latest/stable canonical✓ -
core20 20230308 1852 latest/stable canonical✓ base
$ lsb_release -rd
Description: Ubuntu 22.04.2 LTS
Release: 22.04
$ uname -a
Linux sdeziel-lemur 5.19.0-40-generic #41~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC
Fri Mar 31 16:00:14 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
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