[   12.671643][  T117] su (117) used greatest stack depth: 24072 bytes left
[   12.671664][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   12.671666][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[   12.671668][  T117] preempt_count: 2, expected: 0
[   12.671668][  T117] RCU nest depth: 0, expected: 0
[   12.671669][  T117] locks held by su/117: 5, last CPU#3:
[   12.671671][  T117]  #0: ffffffff97c167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   12.671683][  T117]  #1: ffffffff97d7ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   12.671688][  T117]  #2: ffffffff97d7de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   12.671692][  T117]  #3: ffffffff97c9d760 (console_owner){...