[  263.519317][  T110] su (110) used greatest stack depth: 22992 bytes left
[  263.519332][  T110] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  263.519335][  T110] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 110, name: su
[  263.519344][  T110] preempt_count: 2, expected: 0
[  263.519345][  T110] RCU nest depth: 0, expected: 0
[  263.519347][  T110] INFO: lockdep is turned off.
[  263.519348][  T110] irq event stamp: 131710
[  263.519349][  T110] hardirqs last  enabled at (131709): [<ffffffffb31b1483>] _raw_spin_unlock_irqrestore+0x53/0x80
[  263.519359][  T110] hardirqs last disabled at (131710): [<ffffffffb3193b26>] __schedule+0x1246/0x20e0
[  263.519361][  T110] softirqs last  enabled at (131608): [<ffffffffb0bcaa2c>] handle_softirqs+0x67c/0x900
[  263.519366][  T110] softirqs last disabled at (129965): [<ffffffffb0bcae65>] __irq_exit_rcu+0x145/0x1c0
[  263.519369][  T110] Preemption disabled at:
[  263.519370][  T110] [<0000000000000000>] 0x0
[  263.519376][  T110] CPU: 1 UID: 0 PID: 110 Comm: su Tainted: G        W           7.2.0-virtme #1 PREEMPT(full) 
[  263.519379][  T110] Tainted: [W]=WARN
[  263.519380][  T110] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  263.519382][  T110] Call Trace:
[  263.519383][  T110]  <TASK>
[  263.519385][  T110]  dump_stack_lvl+0x6f/0xa0
[  263.519390][  T110]  __might_resched.cold+0x1