Public bug reported: Since http://bazaar.launchpad.net/~phablet-team/webbrowser- app/trunk/revision/1019, the webapp container (and all other embedders using an Ubuntu WebView) dynamically computes the cache size hint based on the available disk space.
This doesn’t work in the general case, when the app is confined by apparmor, because the computation relies on QStorageInfo::bytesAvailable() (http://doc.qt.io/qt-5/qstorageinfo.html#bytesAvailable), which triggers apparmor denials: Jul 6 18:34:07 ubuntu-phablet kernel: [17458.604265]type=1400 audit(1436200447.375:184): apparmor="DENIED" operation="open" profile="com.ubuntu.developer.webapps.webapp-amazon-int_webapp-amazon_1.0.10" name="/proc/7424/mounts" pid=7424 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=32011 Jul 6 18:34:07 ubuntu-phablet kernel: [17458.604407]type=1400 audit(1436200447.375:185): apparmor="DENIED" operation="open" profile="com.ubuntu.developer.webapps.webapp-amazon-int_webapp-amazon_1.0.10" name="/dev/disk/by-label/" pid=7424 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0 This essentially means that the computation of the cache size hint is broken. It has also been reported that this breaks other apps’ functionality: https://lists.launchpad.net/ubuntu-phone/msg13622.html. ** Affects: apparmor-easyprof-ubuntu (Ubuntu) Importance: Undecided Status: New ** Affects: webbrowser-app (Ubuntu) Importance: High Assignee: Olivier Tilloy (osomon) Status: Confirmed ** Also affects: apparmor-easyprof-ubuntu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1471890 Title: cacheSizeHint computation for webapps is incorrect due to apparmor denials To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor-easyprof-ubuntu/+bug/1471890/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
