[   54.238605][  T109] su (109) used greatest stack depth: 24104 bytes left
[   54.238625][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   54.238627][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   54.238629][  T109] preempt_count: 2, expected: 0
[   54.238630][  T109] RCU nest depth: 0, expected: 0
[   54.238631][  T109] locks held by su/109: 5, last CPU#0:
[   54.238633][  T109]  #0: ffffffffbb2027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   54.238645][  T109]  #1: ffffffffbb369cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   54.238651][  T109]  #2: ffffffffbb369d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   54.238654][  T109]  #3: ffffffffbb289660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   54.238657][  T109]  #4: ffffffffbb289560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   54.238661][  T109] irq event stamp: 162074
[   54.238662][  T109] hardirqs last  enabled at (162073): [<ffffffffb816d546>] __down_trylock_console_sem+0x86/0xa0
[   54.238665][  T109] hardirqs last disabled at (162074): [<ffffffffb81735f4>] console_emit_next_record+0x3d4/0x4c0
[   54.238666][  T109] softirqs last  enabled at (160852): [<ffffffffb7fcaa2c>] handle_softirqs+0x67c/0x900
[   54.238668][  T109] softirqs last disabled at (160845): [<ffffffffb7fcae65>] __irq_exit_rcu+0x145/0x1c0
[   54.238671][  T109] Preemption disabled at:
[   54.238672][  T109] [<0000000000000000>] 0x0
[   54.238679][  T109] CPU: 0 UID: 0 PID: 109 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   54.238682][  T109] Tainted: [W]=WARN
[   54.238683][  T109] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   54.238684][  T109] Call Trace:
[   54.238686][  T109]  <TASK>
[   54.238688][  T109]  dump_stack_lvl+0x6f/0xa0
[   54.238693][  T109]  __might_resched.cold+0x1fe/0x2c1