[   56.085675][  T111] su (111) used greatest stack depth: 24104 bytes left
[   56.085695][  T111] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   56.085697][  T111] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 111, name: su
[   56.085698][  T111] preempt_count: 2, expected: 0
[   56.085699][  T111] RCU nest depth: 0, expected: 0
[   56.085700][  T111] locks held by su/111: 5, last CPU#0:
[   56.085702][  T111]  #0: ffffffffab802f58 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x8e7/0xef0
[   56.085714][  T111]  #1: ffffffffab96a440 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   56.085719][  T111]  #2: ffffffffab96a4b8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   56.085723][  T111]  #3: ffffffffab889de0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   56.085726][  T111]  #4: ffffffffab889ce0 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   56.085729][  T111] irq event stamp: 157614
[   56.085730][  T111] hardirqs last  enabled at (157613): [<ffffffffa8573a46>] __down_trylock_console_sem+0x86/0xa0
[   56.085734][  T111] hardirqs last disabled at (157614): [<ffffffffa8579af4>] console_emit_next_record+0x3d4/0x4c0
[   56.085735][  T111] softirqs last  enabled at (156060): [<ffffffffa83d0d0c>] handle_softirqs+0x67c/0x900
[   56.085738][  T111] softirqs last disabled at (156055): [<ffffffffa83d1145>] __irq_exit_rcu+0x145/0x1c0
[   56.085740][  T111] Preemption disabled at:
[   56.085741][  T111] [<0000000000000000>] 0x0
[   56.085747][  T111] CPU: 0 UID: 0 PID: 111 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   56.085751][  T111] Tainted: [W]=WARN
[   56.085752][  T111] Hardware name: Bochs Bochs, BIOS Bochs 01