[  160.377566][  T110] su (110) used greatest stack depth: 24104 bytes left
[  160.377584][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  160.377586][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[  160.377588][  T110] preempt_count: 2, expected: 0
[  160.377589][  T110] RCU nest depth: 0, expected: 0
[  160.377590][  T110] locks held by su/110: 5, last CPU#1:
[  160.377592][  T110]  #0: ffffffff8ce027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[  160.377604][  T110]  #1: ffffffff8cf69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[  160.377609][  T110]  #2: ffffffff8cf69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[  160.377613][  T110]  #3: ffffffff8ce89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[  160.377617][  T110]  #4: ffffffff8ce89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[  160.377620][  T110] irq event stamp: 157820
[  160.377621][  T110] hardirqs last  enabled at (157819): [<ffffffff89d70546>] __down_trylock_console_sem+0x86/0xa0
[  160.377624][  T110] hardirqs last disabled at (157820): [<ffffffff89d765f4>] console_emit_next_record+0x3d4/0x4c0
[  160.377626][  T110] softirqs last  enabled at (157476): [<ffffffff89bcda2c>] handle_softirqs+0x67c/0x900
[  160.377627][  T110] softirqs last disabled at (156415): [<ffffffff89bcde65>] __irq_exit_rcu+0x145/0x1c0
[  160.377630][  T110] Preemption disabled at:
[  160.377630][  T110] [<0000000000000000>] 0x0
[  160.377638][  T110] CPU: 1 UID: 0 PID: 110 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[  160.377641][  T110] Tainted: [W]=WARN
[  160.377642][  T110] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  160.377643][  T110] Call Trace:
[  160.377645][  T110]  <TASK>
[  160.377646][  T110]  dump_stack_lvl+0x6f/0xa0
[  160.377653][  T110]  __might_resched.cold+0x1