[   13.870569][  T110] su (110) used greatest stack depth: 24104 bytes left
[   13.870590][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   13.870592][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   13.870593][  T110] preempt_count: 2, expected: 0
[   13.870594][  T110] RCU nest depth: 0, expected: 0
[   13.870595][  T110] locks held by su/110: 5, last CPU#3:
[   13.870598][  T110]  #0: ffffffffa50027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   13.870611][  T110]  #1: ffffffffa5169cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   13.870616][  T110]  #2: ffffffffa5169d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   13.870619][  T110]  #3: ffffffffa5089660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   13.870622][  T110]  #4: ffffffffa5089560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   13.870626][  T110] irq event stamp: 146246
[   13.870627][  T110] hardirqs last  enabled at (146245): [<ffffffffa1f6d546>] __down_trylock_console_sem+0x86/0xa0
[   13.870630][  T110] hardirqs last disabled at (146246): [<ffffffffa1f735f4>]