[   59.293432][  T118] su (118) used greatest stack depth: 23936 bytes left
[   59.293454][  T118] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   59.293457][  T118] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 118, name: su
[   59.293459][  T118] preempt_count: 2, expected: 0
[   59.293461][  T118] RCU nest depth: 0, expected: 0
[   59.293462][  T118] locks held by su/118: 5, last CPU#0:
[   59.293465][  T118]  #0: ffffffff8fa167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   59.293479][  T118]  #1: ffffffff8fb7ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   59.293486][  T118]  #2: ffffffff8fb7de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   59.293492][  T118]  #3: ffffffff8fa9d760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   59.293497][  T118]  #4: ffffffff8fa9d660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   59.293503][  T118] irq event stamp: 167074
[   59.293504][  T118] hardirqs last  enabled at (167073): [<ffffffff8bf86626>] __down_trylock_console_sem+0x86/0xa0
[   59.293508][  T118] hardirqs last disabled at (167074): [<ffffffff8bf8c6c4>] console_emit_next_record+0x3d4/0x4c0
[   59.293511][  T118] softirqs last  enabled at (166866): [<ffffffff8bde0d0c>] handle_softirqs+0x67c/0x900
[   59.293514][  T118] softirqs last disabled at (165249): [<ffffffff8bde1145>] __irq_exit_rcu+0x145/0x1c0
[   59.293517][  T118] Preemption disabled at:
[   59.293518][  T118] [<0000000000000000>] 0x0
[   59.293526][  T118] CPU: 0 UID: 0 PID: 118 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   59.293531][  T118] Tainted: [W]=WARN
[   59.293532][  T118] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   59.293535][  T118] Call Trace:
[   59.293537][  T118]  <TASK>
[   59.293539][  T118]  dump_stack_lvl+0x6f/0xa0