[   90.951998][  T109] su (109) used greatest stack depth: 23136 bytes left
[   90.952017][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   90.952019][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   90.952021][  T109] preempt_count: 2, expected: 0
[   90.952021][  T109] RCU nest depth: 0, expected: 0
[   90.952023][  T109] locks held by su/109: 5, last CPU#0:
[   90.952029][  T109]  #0: ffffffffac8267b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   90.952042][  T109]  #1: ffffffffac98dcc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0