[   12.067742][  T117] su (117) used greatest stack depth: 23744 bytes left
[   12.067757][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   12.067759][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[   12.067760][  T117] preempt_count: 2, expected: 0
[   12.067761][  T117] RCU nest depth: 0, expected: 0
[   12.067762][  T117] locks held by su/117: 5, last CPU#2:
[   12.067764][  T117]  #0: ffffffffbbc167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0