[   55.778256][  T117] su (117) used greatest stack depth: 23744 bytes left
[   55.778273][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   55.778275][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[   55.778277][  T117] preempt_count: 2, expected: 0
[   55.778278][  T117] RCU nest depth: 0, expected: 0
[   55.778278][  T117] locks held by su/117: 5, last CPU#3:
[   55.778280][  T117]  #0: ffffffffaf0167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   55.778292][  T117]  #1: ffffffffaf17ddc0 (console_lock){+.+.