[   67.929496][  T117] su (117) used greatest stack depth: 24072 bytes left
[   67.929514][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   67.929516][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[   67.929518][  T117] preempt_count: 2, expected: 0
[   67.929519][  T117] RCU nest depth: 0, expected: 0
[   67.929520][  T117] locks held by su/117: 5, last CPU#3:
[   67.929522][  T117]  #0: ffff