Hello Robie. Unfortunately, this problem appeared again. Today, I have had Firefox enabled with just two tabs: YouTube and Google Translate. Suddenly, system start to slow down, disk diode was... red all the time, mouse cursor moved slowly etc. After a couple of minutes, I managed to start terminal and used '$ killall firefox' command, which helped -- system started to work faster again, clicking e.g. on a file, opened Mousepad almost immediately, in milliseconds etc.
Log files (such as '/var/log/syslog' or '/var/log/kern.log') contains: ✓ Sep 4 13:46:00 holycross kernel: [10194.439105] Chrome_~dThread[3599]: segfault at 0 ip b03f6b24 sp afaa1040 error 6 in libxul.so[afb73000+570f000] ✓ Sep 4 13:46:00 holycross kernel: [10195.084439] Chrome_~dThread[4040]: segfault at 0 ip b042fb24 sp afada040 error 6 in libxul.so[afbac000+570f000] As we can see, there is a problem in 'libxul.so'. (See bug title.) Firefox version: 55.0.2 (32-bit), e10s enabled (4. processes; changed from 2. after update), four addons, no Flash. RAM memory checked with memtest64 - no problems. I will keep an eye on this, because of a couple of months without problem. Maybe it was just an accident? Thanks, best regards. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1656065 Title: Firefox and plugin-container (Chrome_ChildThr): segfault at 0 ip, sp error 6 in plugin-container/libxul.so Status in firefox package in Ubuntu: Fix Released Bug description: Hello. Some days ago, Firefox unexpectedly has been closed after a couple of hours (mostly viewed: YouTube and some other websites). Next, a dialog box related to the Mozilla Crash Reporter appeared - with message, that reporter is disabled (which I did earlier via 'about:config' and *datareporting.healthreport.service.enabled* key set to _false_) and no crash report is available even via 'about:crashes' etc. After this situation two entries appeared in the log files: first related to the AppArmor and second: plugin-container segfault. By the way: in the same time there was an update for flash-plugin available (see: 1). Anyway, 'LastCrash' file (which can be found in ~/.mozilla/firefox/Crash Reports/ directory) contains only: 1484142985. Just like all the others files in this directory. There are also two folders called: 'events' and 'pending'. But they are completely empty. However, system log files, such as '/var/log/kern.log' or '/var/log/syslog', contains an interesting entries: ● Jan 11 14:56:25 t4 kernel: [ 4161.295639] type=1400 audit(1484142985.517:46): apparmor="DENIED" operation="open" parent=2818 profile="/usr/lib/firefox/firefox{,*[^s][^h]}" name="/proc/2818/task/" pid=3253 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 ● Jan 11 14:56:25 t4 kernel: [ 4161.540727] Chrome_ChildThr[2890]: segfault at 0 ip b76df673 sp b1efe9f0 error 6 in plugin- container[b76d8000+42000] As we know, thanks to the plugin-container, plugins are separated from the browser process, making it more stable, right? So now if a plugin crashes, Firefox should remains unharmed. It looks like this is a known problem (see: 2, 3). By the way; on Moday, 16 January, Firefox has been closed again - no action from my side. Log files contain the same entries as above: ● Jan 16 16:39:35 t4 kernel: [14373.711834] type=1400 audit(1484581175.931:48): apparmor="DENIED" operation="open" parent=2532 profile="/usr/lib/firefox/firefox{,*[^s][^h]}" name="/proc/2532/task/" pid=3389 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 ● Jan 16 16:39:36 t4 kernel: [14373.934394] Chrome_ChildThr[3041]: segfault at 0 ip b76f8673 sp b1efe9f0 error 6 in plugin- container[b76f1000+42000] Anyway, after adding these two rules to the Firefox profile, everything seems to be OK and there is not DENIED message for "/proc/*/task/" entry anymore (so the first issue is solved): owner @{PROC}/[0-9]*/task/ r, owner @{PROC}/[0-9]*/task/* r, NOTE: This problem occurs when adobe-flash plugin is not activated and is permanently disabled and also when is used/enabled. Here are some informations about versions etc.: ● Firefox: 50.1.0 ● Flash: 24.0.0.194ubuntu0.12.04.1 ● Linux: 3.2.0-120-generic-pae (3.2.79) i686 ● AppArmor: 2.7.102-0ubuntu3.10 ● Release: 12.04.5 LTS (via `lsb_release -a` command) Best regards. _____________ [1] https://lists.ubuntu.com/archives/precise-changes/2017-January/026047.html [2] https://bugzilla.mozilla.org/show_bug.cgi?id=1205199 [3] https://bugzilla.redhat.com/show_bug.cgi?id=1253086 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1656065/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
