[   14.760610][  T109] su (109) used greatest stack depth: 23776 bytes left
[   14.760632][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   14.760634][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   14.760635][  T109] preempt_count: 2, expected: 0
[   14.760636][  T109] RCU nest depth: 0, expected: 0
[   14.760637][  T109] locks held by su/109: 5, last CPU#1:
[   14.760640][  T109]  #0: ffffffffa96027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   14.760653][  T109]  #1: ffffffffa9769cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   14.760658][  T109]  #2: ffffffffa9769d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   14.760661][  T109]  #3: ffffffffa9689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   14.760665][  T109]  #4: ffffffffa9689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   14.760668][  T109] irq event stamp: 161698
[   14.760669][  T109] hardirqs last  enabled at (161697): [<ffffffffa656d546>] __down_trylock_console_sem+0x86/0xa0
[   14.760673][  T109] hardirqs last disabled at (161698): [<ffffffffa65735f4>] console_emit_next_record+0x3d4/0x4c0
[   14.760674][  T109] softirqs last  enabled at (160440): [<ffffffffa63caa2c>] handle_softirqs+0x67c/0x900
[   14.760677][  T109] softirqs last disabled at (158739): [<ffffffffa63cae65>] __irq_exit_rcu+0x145/0x1c0
[   14.760679][  T109] Preemption disabled at:
[   14.760680][  T109] [<0000000000000000>] 0x0
[   14.760686][  T109] CPU: 1 UID: 0 PID: 109 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[   14.760690][  T109] Tainted: [W]=WARN
[   14.760691][  T109] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.760693][  T109] Call Trace:
[   14.760695][  T109]  <TASK>
[   14.760696][  T109]  dump_stack_lvl+0x6f/0xa0
[   14.760701][  T109]  __might_resched.cold+0x1fe/0x2c1
[   14.760706][  T109]  ? perf_trace_sched_switch+0x7c0/0x7c0
[   14.760709][  T109]  ? __kmalloc_noprof+0xdb/0x760
[   14.760715][  T109]  __kmalloc_noprof+0x443/0x760
[   14.760718][  T109]  ? alloc_buf.isra.0+0x4b/0x260
[   14.760724][  T109]  ? do_raw_spin_unlock+0x59/0x250
[   14.760727][  T109]  alloc_buf.isra.0+0x4b/0x260