This is almost certainly the same as https://bugzilla.kernel.org/show_bug.cgi?id=27142 I reproduced the same issue here with the testcase there.
** Bug watch added: Linux Kernel Bug Tracker #27142 http://bugzilla.kernel.org/show_bug.cgi?id=27142 ** Summary changed: - Slow System Crash due to Kernel Problem + panic in task_rq_lock (race with concurrent semtimedop() timeouts and IPC_RMID) ** Also affects: linux (Ubuntu Natty) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Natty) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Natty) Status: New => In Progress ** Changed in: linux (Ubuntu Natty) Assignee: (unassigned) => Herton R. Krzesinski (herton) ** Changed in: linux (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/943815 Title: panic in task_rq_lock (race with concurrent semtimedop() timeouts and IPC_RMID) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/943815/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
