[   50.995226][  T110] su (110) used greatest stack depth: 24104 bytes left
[   50.995244][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   50.995246][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   50.995247][  T110] preempt_count: 2, expected: 0
[   50.995248][  T110] RCU nest depth: 0, expected: 0
[   50.995249][  T110] locks held by su/110: 5, last CPU#0:
[   50.995251][  T110]  #0: ffffffff8fc02f58 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x8e7/0xef0