[   13.778997][  T109] su (109) used greatest stack depth: 23648 bytes left
[   13.779017][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   13.779019][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   13.779021][  T109] preempt_count: 2, expected: 0
[   13.779022][  T109] RCU nest depth: 0, expected: 0
[   13.779022][  T109] locks held by su/109: 5, last CPU#2:
[   13.779025][  T109]  #0: ffffffffb10027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   13.779037][  T109]  #1: ffffffffb1169cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   13.779043][  T109]  #2: ffffffffb1169d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   13.779046][  T109]  #3: ffffffffb1089660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   13.779049][  T109]  #4: ffff