The Oops was happened on the killall5 before power_off().
EIP: c013ce46
First CallTrace: c1081c20
c013cddc T proc_lookup
c013ceac t proc_root_lookup
The first CallTrace was a module address but I can' t found it before
the kernel lock after the Oops...
With my kernel knowledge I can' t do nothing...
Andrea[s] Arcangeli