[  251.740767][  T113] su (113) used greatest stack depth: 23568 bytes left
[  251.740788][  T113] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  251.740791][  T113] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 113, name: su
[  251.740793][  T113] preempt_count: 2, expected: 0
[  251.740794][  T113] RCU nest depth: 0, expected: 0
[  251.740794][  T113] locks held by su/113: 5, last CPU#3:
[  251.740797][  T113]  #0: ffffffffa84027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[  251.740809][  T113]  #1: ffffffffa8599cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[  251.740814][  T113]  #2: ffffffffa8599d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[  251.740817][  T113]  #3: ffffffffa8489660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[  251.740821][  T113]  #4: ffffffffa8489560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0
[  251.740824][  T113] irq event stamp: 155144
[  251.740825][  T113] hardirqs last  enabled at (155143): [<ffffffffa517a536>] __down_trylock_console_sem+0x86/0xa0
[  251.740829][  T113] hardirqs last disabled at (155144): [<ffffffffa51807d8>] console_emit_next_record+0x3f8/0x4f0
[  251.740830][  T113] softirqs last  enabled at (154398): [<ffffffffa4fd7a2c>] handle_softirqs+0x67c/0x900
[  251.740832][  T113] softirqs last disabled at