firefox freezes on pages with java

[Alistair Buxton]

Binary package hint: firefox-3.5

When I visit this page:

http://java.com/en/download/help/testvm.xml

The first time, the test applet does not load up, even though Java is installed. If I press reload, Firefox. This suggests a sequence of events like:

1. The first time Firefox attempts to load the Java plugin, it fails, freezing part way, and locking some resource.
2. The second time Firefox attempts to load the Java plugin, the frozen instance is still hanging around, causing the second instance to freeze at an earlier point, and freezing Firefox with it.

Apport dump included, generated with a clean profile.

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Thu Dec 24 17:57:16 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/firefox-3.5.6/firefox
NonfreeKernelModules: nvidia
Package: firefox-3.5 3.5.6+nobinonly-0ubuntu0.9.10.1
ProcCmdline: root=UUID=d6b3c8c0-4638-4a77-aeb6-b1963733437e ro quiet splash crashkernel=384M-2G:64M,2G-:128M
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SegvAnalysis:
 Segfault happened at: 0x8bd832 <_dl_sysinfo_int80+2>: ret
 PC (0x008bd832) ok
 Reason could not be automatically determined.
Signal: 11
SourcePackage: firefox-3.5
StacktraceTop:
 _dl_sysinfo_int80 () from /lib/ld-linux.so.2
 pthread_cond_timedwait@@GLIBC_2.3.2 ()
 __pthread_cond_timedwait_2_0 (cond=0xb1893940,
 os::PlatformEvent::park(long long) ()
 ObjectMonitor::EnterI(Thread*) ()
Title: firefox crashed with SIGSEGV in _dl_sysinfo_int80()
Uname: Linux 2.6.31-16-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare video

[Alistair Buxton (a-j-buxton)]

I can confirm that this is apparmor related. After "sudo /etc/init.d/apparmor stop" Java applets work correctly and do not crash firefox.