[  153.172626][  T112] su (112) used greatest stack depth: 24104 bytes left
[  153.172642][  T112] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  153.172645][  T112] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 112, name: su
[  153.172646][  T112] preempt_count: 2, expected: 0
[  153.172647][  T112] RCU nest depth: 0, expected: 0
[  153.172648][  T112] INFO: lockdep is turned off.
[  153.172649][  T112] irq event stamp: 123990
[  153.172650][  T112] hardirqs last  enabled at (123989): [<ffffffff94346483>] _raw_spin_unlock_irqrestore+0x53/0x80
[  153.172659][  T112] hardirqs last disabled at (123990): [<ffffffff94328b26>] __schedule+0x1246/0x20e0
[  153.172662][  T112] softirqs last  enabled at (123882): [<ffffffff91ad0ec9>] fpu_clone+0xd9/0x410
[  153.172665][  T112] softirqs last disabled at (123880): [<ffffffff91ad0e72>] fpu_clone+0x82/0x410
[  153.172667][  T112] Preemption disabled at:
[  153.172668][  T112] [<0000000000000000>] 0x0
[  153.172674][  T112] CPU: 3 UID: 0 PID: 112 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[  153.172677][  T112] Tainted: [W]=WARN
[  153.172678][  T112] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  153.172680][  T112] Call Trace:
[  153.172681][  T112]  <TASK>
[  153.172683][  T112]  dump_stack_lvl+0x6f/0xa0
[  153.172687][  T112]  __might_resched.cold+0x1fe/0x2c1
[  153.172691][  T112]  ? perf_trace_sched_switch+0x7c0/0x7c0
[  153.172694][  T112]  ? __asan_memcpy+0x3c/0x60
[  153.172697][  T112]  ? rcu_is_watching+0x16/0xd0
[  153.172701][  T112]  __kmalloc_noprof+0x443/0x760
[  153.172704][  T112]  ? __rwlock_init+0x150/0x150
[  153.172707][  T112]  ? alloc_buf.isra.0+0x4b/0x260
[  153.172713][  T112]  ? do_raw_spin_unlock+0x59/0x250
[  153.172715][  T112]  alloc_buf.isra.0+0x4b/0x260
[  153.172718][  T112]  put_chars+0x1e1/0x2f0
[  153.172720][  T112]  ? __send_to_port+0x420/0x420
[  153.172721][  T112]  ? console_prepend_replay+0x20/0x20
[  153.172725][  T112]  hvc_console_print+0x292/0x780
[  153.172728][  T112]  ? hvc_write+0x3a0/0x3a0
[  153.172730][  T112]  ? rcu_is_watching+0x16/0xd0
[  153.172731][  T112]  ? lock_acquire+0x13c/0x160
[  153.172734][  T112]  console_emit_next_record+0x22f/0x4c0
[  153.172736][  T112]  ? devkmsg_read+0x4b0/0x4b0
[  153.172738][  T112]  ? rcu_is_watching+0x16/0