[   56.543845][  T109] su (109) used greatest stack depth: 24104 bytes left
[   56.543865][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   56.543868][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   56.543869][  T109] preempt_count: 2, expected: 0
[   56.543870][  T109] RCU nest depth: 0, expected: 0
[   56.543871][  T109] locks held by su/109: 5, last CPU#0:
[   56.543873][  T109]  #0: ffffffffb12027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   56.543886][  T109]  #1: ffffffffb1369cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   56.543891][  T109]  #2: ffffffffb1369d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   56.543894][  T109]  #3: ffffffffb1289660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   56.543897][  T109]  #4: ffffffffb1289560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   56.543900][  T109] irq event stamp: 156102
[   56.543901][  T109] hardirqs last  enabled at (156101): [<ffffffffae16d546>] __down_trylock_console_sem+0x86/0xa0
[   56.543904][  T109] hardirqs last disabled at (156102): [<ffffffffae1735f4>] console_emit_next_record+0x3d4/0x4c0
[   56.543906][  T109] softirqs last  enabled at (155272): [<ffffffffadfcaa2c>] handle_softirqs+0x67c/0x900
[   56.543908][  T109] softirqs last disabled at (155267): [<ffffffffadfcae65>] __irq_exit_rcu+0x145/0x1c0
[   56.543910][  T109] Preemption disabled at:
[   56.543911][  T109] [<0000000000000000>] 0x0
[   56.543917][  T109] CPU: 0 UID: 0 PID: 109 Comm: su Tainted: