[   13.853217][  T110] su (110) used greatest stack depth: 24104 bytes left
[   13.853238][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   13.853241][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   13.853242][  T110] preempt_count: 2, expected: 0
[   13.853243][  T110] RCU nest depth: 0, expected: 0
[   13.853244][  T110] locks held by su/110: 5, last CPU#3:
[   13.853247][  T110]  #0: ffffffffa0e027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   13.853259][  T110]  #1: ffffffffa0f69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   13.853264][  T110]  #2: ffffffffa0f69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   13.853268][  T110]  #3: ffffffffa0e89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   13.853271][  T110]  #4: ffffffffa0e89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   13.853274][  T110] irq event stamp: 170852
[   13.853275][  T110] hardirqs last  enabled at (170851): [<ffffffff9dd6d546>] __down_trylock_console_sem+0x86/0xa0
[   13.853279][  T110] hardirqs last disabled at (170852): [<ffffffff9dd735f4>] console_emit_next_record+0x3d4/0x4c0
[   13.853280][  T110] softirqs last  enabled at (168898): [<ffffffff9dbcaa2c>] handle_softirqs+0x67c/0x900
[   13.853282][  T110] softirqs last disabled at (168893): [<ffffffff9dbcae65>] __irq_exit_rcu+0x145/0x1c0
[   13.853284][  T110] Preemption disabled at:
[   13.853285][  T110] [<0000000000000000>] 0x0
[   13.853292][  T110] CPU: 3 UID: 0 PID: 110 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   13.853295][  T110] Tainted: [W]=WARN
[   13.853296][  T110] Hardware name: Bochs Bochs, BIOS Bochs 01