[   12.394855][  T110] su (110) used greatest stack depth: 23776 bytes left
[   12.394875][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   12.394877][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   12.394878][  T110] preempt_count: 2, expected: 0
[   12.394879][  T110] RCU nest depth: 0, expected: 0
[   12.394880][  T110] locks held by su/110: 5, last CPU#0:
[   12.394883][  T110]  #0: ffffffffa42027b8 (low_water_lock){+.+.}-{3:3}, at: d