[   12.845191][  T109] su (109) used greatest stack depth: 24104 bytes left
[   12.845212][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   12.845219][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   12.845221][  T109] preempt_count: 2, expected: 0
[   12.845222][  T109] RCU nest depth: 0, expected: 0
[   12.845223][  T109] locks held by su/109: 5, last CPU#3:
[   12.845225][  T109]  #0: ffffffffb9e027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   12.845238][  T109]  #1: ffffffffb9f69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   12.845242][  T109]  #2: ffffffffb9f69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   12.845246][  T109]  #3: ffffffffb9e89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   12.845249][  T109]  #4: ffffffffb9e89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   12.845252][  T109] irq event stamp: 160882
[   12.845253][  T109] hardirqs last  enabled at (160881): [<ffffffffb6d6d546>] __down_trylock_console_sem+0x86/0xa0
[   12.845257][  T109] hardirqs last disabled at (160882): [<ffffffffb6d735f4>] console_emit_next_record+0x3d4/0x4c0
[   12.845258][  T109] softirqs last  enabled at (159354): [<ffffffffb6bcaa2c>] handle_softirqs+0x67c/0x900
[   12.845261][  T109] softirqs last disabled at (158433): [<ffffffffb6bcae65>]