[   48.948146][  T111] su (111) used greatest stack depth: 24104 bytes left
[   48.948164][  T111] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   48.948166][  T111] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 111, name: su
[   48.948168][  T111] preempt_count: 2, expected: 0
[   48.948168][  T111] RCU nest depth: 0, expected: 0
[   48.948169][  T111] locks held by su/111: 5, last CPU#1:
[   48.948171][  T111]  #0: ffffffffb7402f58 (low_water_lock){+.