[    9.205099][  T110] su (110) used greatest stack depth: 24104 bytes left
[    9.205115][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[    9.205117][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[    9.205118][  T110] preempt_count: 2, expected: 0
[    9.205119][  T110] RCU nest depth: 0, expected: 0
[    9.205120][  T110] locks held by su/110: 5, last CPU#3:
[    9.205122][  T110]  #0: ffffffffa0a02f58 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x8e7/0xef0
[    9.205134][  T110]  #1: ffffffffa0b6a440 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[    9.205138][  T110]  #2: ffffffffa0b6a4b8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[    9.205142][  T110]  #3: ffffffffa0a89de0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[    9.205145][  T110]  #4: ffffffffa0a89ce0 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[    9.205148][  T110] irq event stamp: 161178
[    9.205149][  T110] hardirqs last  enabled at (161177): [<ffffffff9d773a46>] __down_trylock_console_sem+0x86/0xa0