[  116.894561][  T110] su (110) used greatest stack depth: 24104 bytes left
[  116.894581][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  116.894583][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[  116.894584][  T110] preempt_count: 2, expected: 0
[  116.894585][  T110] RCU nest depth: 0, expected: 0
[  116.894586][  T110] locks held by su/110: 5, last CPU#3:
[  116.894589][  T110]  #0: ffffffffbb4027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0