[   53.848288][  T109] su (109) used greatest stack depth: 24104 bytes left
[   53.848309][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   53.848311][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   53.848313][  T109] preempt_count: 2, expected: 0
[   53.848314][  T109] RCU nest depth: 0, expected: 0
[   53.848315][  T109] locks held by su/109: 5, last CPU#3:
[   53.848317][  T109]  #0: ffffffffa7e027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   53.848330][  T109]  #1: ffffffffa7f69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   53.848335][  T109]  #2: ffffffffa7f69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   53.848339][  T109]  #3: ffffffffa7e89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   53.848342][  T109]  #4: ffffffffa7e89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   53.848345][  T109] irq event stamp: 162170
[   53.848346][  T109] hardirqs last  enabled at (162169): [<ffffffffa4d6d546>] __down_trylock_console_sem+0x86/0xa0
[   53.848350][  T109] hardirqs last disabled at (162170): [<ffffffffa4d735f4>] console_emit_next_record+0x3d4/0x4c0
[   53.848351][  T109] softirqs last  enabled at (157562): [<ffffffffa4bcaa2c>] handle_softirqs+0x67c/0x900
[   53.848353][  T109] softirqs last disabled at (156053): [<ffffffffa4bcae65>] __irq_exit_rcu+0x145/0x1c0
[   53.848356][  T109] Preemption disabled at:
[   53.848357][  T109] [<0000000000000000>] 0x0
[   53.848364][  T109] CPU: 3 UID: 0 PID: 109 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   53.848367][  T109] Tainted: [W]=WARN
[   53.848368][  T109] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   53.848370][  T109] Call Trace:
[   53.848372][  T109]  <TASK>
[   53.848373][  T109]  dump_stack_lvl+0x6f/0xa0
[   53.848379][  T109]  __might_resched.cold+0x1fe/0x2c1
[   53.848383][  T109]  ? perf_trace_sched_switch+0x7c0/0x7c0
[   53.848386][  T109]  ? __kmalloc_noprof+0xdb/0x760
[   53.848392][  T109]  __kmalloc_noprof+0x443/0x760
[   53.848394][