[   85.209568][  T110] su (110) used greatest stack depth: 23776 bytes left
[   85.209588][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   85.209590][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   85.209592][  T110] preempt_count: 2, expected: 0
[   85.209592][  T110] RCU nest depth: 0, expected: 0
[   85.209593][  T110] locks held by su/110: 5, last CPU#0:
[   85.209596][  T110]  #0: ffffffffa6a027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0