[   57.773917][  T109] su (109) used greatest stack depth: 24104 bytes left
[   57.773937][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   57.773939][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   57.773941][  T109] preempt_count: 2, expected: 0
[   57.773942][  T109] RCU nest depth: 0, expected: 0
[   57.773943][  T109] locks held by su/109: 5, last CPU#0:
[   57.773945][  T109]  #0: ffffffffb44027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   57.773957][  T109]  #1: ffffffffb4569cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   57.773962][  T109]  #2: ffffffffb4569d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   57.773966][  T109]  #3: ffffffffb4489660 (console_owner){....}-{0:0}, at: co