[   13.185376][  T109] su (109) used greatest stack depth: 23776 bytes left
[   13.185395][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   13.185398][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   13.185399][  T109] preempt_count: 2, expected: 0
[   13.185400][  T109] RCU nest depth: 0, expected: 0
[   13.185401][  T109] locks held by su/109: 5, last CPU#0:
[   13.185403][  T109]  #0: ffffffffa8e027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   13.185415][  T109]  #1: ffffffffa8f69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   13.185421][  T109]  #2: ffffffffa8f69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   13.185424][  T109]  #3: ffffffffa8e89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   13.185428][  T109]  #4: ffffffffa8e89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   13.185432][  T109] irq event stamp: 159098
[   13.185433][  T109] hardirqs last  enabled at (159097): [<ffffffffa5d70546>] __down_trylock_console_sem+0x86/0xa0
[   13.185436][  T109] hardirqs last disabled at (159098): [<ffffffffa5d765f4>] console_emit_next_record+0x3d4/0x4c0
[   13.185438][  T109] softirqs last  enabled at (158708): [<ffffffffa5bcda2c>] handle_softirqs+0x67c/0x900