[   11.848526][  T110] su (110) used greatest stack depth: 24104 bytes left
[   11.848542][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   11.848544][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   11.848546][  T110] preempt_count: 2, expected: 0
[   11.848547][  T110] RCU nest depth: 0, expected: 0
[   11.848548][  T110] locks held by su/110: 5, last CPU#2:
[   11.848550][  T110]  #0: ffffffff8e6027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   11.848561][  T110]  #1: ffffffff8e769cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   11.848567][  T110]  #2: ffffffff8e769d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   11.848570][  T110]  #3: ffffffff8e689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   11.848573][  T110]  #4: ffffffff8e689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   11.848577][  T110] irq event stamp: 165964
[   11.848578][  T110] hardirqs last  enabled at (165963): [<ffffffff8b56d546>] __down_trylock_console_sem+0x86/0xa0