There was a concern that udev is still running at this point, so I added a `ps`
right after `udevadm control --timeout=61 --exit` and the result is this:
Begin: Running /scripts/local-bottom ... done.
done.
Begin: Running /scripts/init-bottom ... PID USER VSZ STAT COMMAND
1 0 4460 S /bin/sh /init ro
2 0 0 SW [kthreadd]
3 0 0 SW [ksoftirqd/0]
4 0 0 SW [kworker/0:0]
5 0 0 SW [kworker/u:0]
6 0 0 SW [migration/0]
7 0 0 SW [migration/1]
8 0 0 SW [kworker/1:0]
9 0 0 SW [ksoftirqd/1]
10 0 0 SW [kworker/0:1]
11 0 0 SW< [cpuset]
12 0 0 SW< [khelper]
13 0 0 SW< [netns]
14 0 0 SW [sync_supers]
15 0 0 SW [kworker/u:1]
16 0 0 SW [bdi-default]
17 0 0 SW< [kintegrityd]
18 0 0 SW< [kblockd]
19 0 0 SW< [ata_sff]
20 0 0 SW [khubd]
21 0 0 SW< [md]
22 0 0 SW [kworker/1:1]
24 0 0 SW [khungtaskd]
25 0 0 SW [kswapd0]
26 0 0 SWN [ksmd]
27 0 0 SWN [khugepaged]
28 0 0 DW [fsnotify_mark]
29 0 0 SW [ecryptfs-kthrea]
30 0 0 SW< [crypto]
38 0 0 SW< [kthrotld]
39 0 0 SW [scsi_eh_0]
40 0 0 SW [scsi_eh_1]
41 0 0 SW [kworker/u:2]
42 0 0 SW [kworker/u:3]
298 0 0 SW [jbd2/vda-8]
299 0 0 SW< [ext4-dio-unwrit]
303 0 4456 S /bin/sh -e /scripts/init-bottom/udev
305 0 4460 R ps
done.
run-init: nuking initramfs contents: Directory not empty
[ 6.397128] Kernel panic - not syncing: Attempted to kill init!
[ 6.397849] Pid: 1, comm: run-init Not tainted 3.0.0-12-server #20-Ubuntu
[ 6.398715] Call Trace:
[ 6.399018] [<ffffffff815e8184>] panic+0x91/0x194
[ 6.399609] [<ffffffff810626c5>] forget_original_parent+0x245/0x250
[ 6.400424] [<ffffffff810626e7>] exit_notify+0x17/0x150
[ 6.401102] [<ffffffff81062feb>] do_exit+0x1fb/0x440
[ 6.401660] [<ffffffff81063387>] sys_exit+0x17/0x20
[ 6.402255] [<ffffffff81606c02>] system_call_fastpath+0x16/0x1b
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https://bugs.launchpad.net/bugs/613273
Title:
kernel panic on ec2 in system_call_fastpath
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