[   44.192467][  T109] su (109) used greatest stack depth: 23776 bytes left
[   44.192487][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   44.192489][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   44.192491][  T109] preempt_count: 2, expected: 0
[   44.192492][  T109] RCU nest depth: 0, expected: 0
[   44.192493][  T109] locks held by su/109: 5, last CPU#3: