[   17.469039][  T111] su (111) used greatest stack depth: 24104 bytes left
[   17.469060][  T111] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   17.469062][  T111] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 111, name: su
[   17.469064][  T111] preempt_count: 2, expected: 0
[   17.469065][  T111] RCU nest depth: 0, expected: 0
[   17.469066][  T111] locks held by su/111: 5, last CPU#3:
[   17.469068][  T111]  #0: ffffffff85002f58 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x8e7/0xef0
[   17.469081][  T111]  #1: ffffffff8516a440 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   17.469086][  T111]  #2: ffffffff8516a4b8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   17.469089][  T111]  #3: ffffffff85089de0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   17.469093][  T111]  #4: ffffffff85089ce0 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   17.469096][  T111] irq event stamp: 161324
[   17.469097][  T111] hardirqs last  enabled at (161323): [<ffffffff81d73a46>] __down_trylock_console_sem+0x86/0xa0
[   17.469100][  T111] hardirqs