** Changed in: qtbase-opensource-src (Ubuntu)
Status: New => Won't Fix
** Changed in: qtmultimedia-opensource-src (Ubuntu)
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1370218
Title:
Fine-grained shm mediation (confined applications need access to
/run/shm/shmfd*)
Status in AppArmor:
Triaged
Status in apparmor package in Ubuntu:
Confirmed
Status in apparmor-easyprof-ubuntu package in Ubuntu:
Fix Released
Status in linux package in Ubuntu:
Triaged
Status in qtbase-opensource-src package in Ubuntu:
Won't Fix
Status in qtmultimedia-opensource-src package in Ubuntu:
Won't Fix
Status in apparmor-easyprof-ubuntu package in Ubuntu RTM:
Fix Released
Bug description:
QAudioRecoder needed the following rules:
owner /{run,dev}/shm/shmfd* rwk,
but then it was discovered that confined apps on utopic also need:
owner /{run,dev}/shm/shmfd* rwk,
The rules are this way because the shared memory files are not app
specific and is possible for one app to access another app's shared
memory file. Please update qtbase-opensource-src so the files are app-
specific to better isolation the apps (this is something we are doing
elsewhere).
Longer term we'd like to have shared memory file mediation in
AppArmor.
Original report:
I recently wrote a small application[1] to spot an ancient issue I had using
QAudioRecorder on Ubuntu devices.
After I have installer gstreamer0.10-pulseaudio (otherwise "pulseaudio:" is
not listed as available source), I tried to start a record through
QAudioRecorder but it failed, giving me this output:
"shm_open() failed: Permission denied"
I've checked for some denials from apparmor (using 'dmesg | grep
DEN'), but none was found.
If I change the apparmor profile[2], so that my test application is
launched in a unconfined environment, QAudioRecorder works properly as
expected.
I run this test on my Nexus 5 (utopic-devel-proposed #185), but this
problem with shm happens also on i386 ubuntu-emulator (utopic-devel
#206).
Just for reference, this is the link to the original mail, stored in the
ubuntu-phone team mailing list archive:
http://lists.launchpad.net/ubuntu-phone/msg09842.html
[1] -
http://bazaar.launchpad.net/~verzegnassi-stefano/+junk/recorder-test/files
[2]
{
"policy_version": 1.2,
"template": "unconfined",
"policy_groups": []
}
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