[   11.743978][  T109] su (109) used greatest stack depth: 24104 bytes left
[   11.743994][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   11.743996][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   11.743997][  T109] preempt_count: 2, expected: 0
[   11.743998][  T109] RCU nest depth: 0, expected: 0
[   11.743999][  T109] locks held by su/109: 5, last CPU#0:
[   11.744001][  T109]  #0: ffffffffa8c027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   11.744012][  T109]  #1: ffffffffa8d69cc0 (console_lock){+.+.