Messages in this thread | | | Date | Thu, 26 Jun 2014 21:11:45 -0400 | From | Sasha Levin <> | Subject | hung task without any output |
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Hi all,
While fuzzing with trinity I've recently observed a situation with has started occurring rather frequently.
I have my configuration set to do a trigger_all_cpu_backtrace() before executing panic(), and that's exactly what happens in some cases.
The new thing which I started seeing is the following:
[ 4806.833452] Kernel panic - not syncing: hung_task: blocked tasks [ 4806.834701] CPU: 26 PID: 3252 Comm: khungtaskd Not tainted 3.16.0-rc2-next-20140626-sasha-00023-g9256882-dirty #732 [ 4806.837672] 00000000003ffcda ffff880bb2d6bd38 ffffffffb1529940 0000000000000001 [ 4806.839784] ffffffffb26fecef ffff880bb2d6bdb8 ffffffffb151cb0f 0000000000000001 [ 4806.840057] 0000000000000008 ffff880bb2d6bdc8 ffff880bb2d6bd68 0000000000000001 [ 4806.840057] Call Trace: [ 4806.840057] [<ffffffffb1529940>] dump_stack+0x4f/0x7c [ 4806.840057] [<ffffffffb151cb0f>] panic+0xd2/0x217 [ 4806.840057] [<ffffffffae24273f>] watchdog+0x43f/0x620 [ 4806.840057] [<ffffffffae242389>] ? watchdog+0x89/0x620 [ 4806.840057] [<ffffffffae242300>] ? reset_hung_task_detector+0x20/0x20 [ 4806.840057] [<ffffffffae196718>] kthread+0x108/0x110 [ 4806.840057] [<ffffffffae196610>] ? kthread_create_on_node+0x260/0x260 [ 4806.840057] [<ffffffffb15774bc>] ret_from_fork+0x7c/0xb0 [ 4806.840057] [<ffffffffae196610>] ? kthread_create_on_node+0x260/0x260 [ 4806.840057] Dumping ftrace buffer: [ 4806.840057] (ftrace buffer empty) [ 4806.840057] Kernel Offset: 0x2d000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Without anything else to accompany it.
Thanks, Sasha
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