[   14.156954][  T110] su (110) used greatest stack depth: 23968 bytes left
[   14.156976][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   14.156979][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[   14.156980][  T110] preempt_count: 2, expected: 0
[   14.156981][  T110] RCU nest depth: 0, expected: 0
[   14.156982][  T110] locks held by su/110: 5, last CPU#0:
[   14.156984][  T110]  #0: ffffffffa5e027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   14.156996][  T110]  #1: ffffffffa5f69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   14.157001][  T110]  #2: ffffffffa5f69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   14.157005][  T110]  #3: ffffffffa5e89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   14.157008][  T110]  #4: ffffffffa5e89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   14.157011][  T110] irq event stamp: 148138
[   14.157012][  T110] hardirqs last  enabled at (148137): [<ffffffffa2d6d546>] __down_trylock_console_sem+0x86/0xa0
[   14.157020][  T110] hardirqs last disabled at (148138): [<ffffffffa2d735f4>] console_emit_next_record+0x3d4/0x4c0
[   14.157021][  T110] softirqs last  enabled at (147108): [<ffffffffa2bcaa2c>] handle_softirqs+0x67c/0x900
[   14.157023][  T110] softirqs last disabled at (145805): [<ffffffffa2bcae65>] __irq_exit_rcu+0x145/0x1c0
[   14.157026][  T110] Preemption disabled at:
[   14.157026][  T110] [<0000000000000000>] 0x0
[   14.157034][  T110] CPU: 0 UID: 0 PID: 110 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   14.157037][  T110] Tainted: [W]=WARN
[   14.157039][  T110] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.157041][  T110] Call Trace:
[   14.157042][  T110]  <TASK>
[   14.157044][  T110]  dump_stack_lvl+0x6f/0xa0