[    9.760514][  T109] su (109) used greatest stack depth: 24104 bytes left
[    9.760531][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[    9.760533][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[    9.760535][  T109] preempt_count: 2, expected: 0
[    9.760536][  T109] RCU nest depth: 0, expected: 0
[    9.760537][  T109] locks held by su/109: 5, last CPU#2:
[    9.760539][  T109]  #0: ffffffff8b4027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[    9.760552][  T109]  #1: ffffffff8b569cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[    9.760557][  T109]  #2: ffffffff8b569d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[    9.760561][  T109]  #3: ffffffff8b489660 (console_owner){....}-{0:0}, at: co