[   56.523502][  T109] su (109) used greatest stack depth: 23776 bytes left
[   56.523522][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   56.523524][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   56.523526][  T109] preempt_count: 2, expected: 0
[   56.523527][  T109] RCU nest depth: 0, expected: 0
[   56.523528][  T109] locks held by su/109: 5, last CPU#0:
[   56.523530][  T109]  #0: ffffffff9d6027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   56.523541][  T109]  #1: ffffffff9d769cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   56.523546][  T109]  #2: ffffffff9d769d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   56.523550][  T109]  #3: ffffffff9d689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   56.523553][  T109]  #4: ffffffff9d689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0