[  120.056973][  T117] su (117) used greatest stack depth: 24264 bytes left
[  120.056991][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  120.056994][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[  120.056997][  T117] preempt_count: 2, expected: 0
[  120.056998][  T117] RCU nest depth: 0, expected: 0
[  120.056999][  T117] INFO: lockdep is turned off.
[  120.057001][  T117] irq event stamp: 36376
[  120.057002][  T117] hardirqs last  enabled at (36375): [<ffffffffaa9e1483>] _raw_spin_unlock_irqrestore+0x53/0x80