vhe-guest kernel panic (once in a while)

Freeing unused kernel memory: 396K (ffff00000883a000 - ffff00000889d000)
Bad mode in Synchronous Abort handler detected, code 0x8600000f -- IABT (current EL)
CPU: 0 PID: 2019060416 Comm:  Not tainted 4.6.0-rc1+ #15
Hardware name: linux,dummy-virt (DT)
task: 0000ffff785d68c0 ti: 0000ffffda527ab0 task.ti:           (null)
PC is at 0xffff785b642c
LR is at 0xffff785b646c
pc : [<0000ffff785b642c>] lr : [<0000ffff785b646c>] pstate: 20000005
sp : ffff8003700c7ff0
x29: 0000ffffda527ab0 x28: 0000000002bc3ef8
x27: 0000ffffda527c70 x26: 0000ffff785d9000
x25: 0000ffff785d6568 x24: 0000ffffda527c80
x23: 00000000af0fbe22 x22: 0000000000000000
x21: 000000000000000b x20: 0000ffff785ca660
x19: 0000ffffda527b60 x18: 0000ffffda527b60
x17: 0000ffff785c18a8 x16: 0000ffff785da000
x15: 0000ffff785da000 x14: 0000000000000041
x13: 0000ffff785acca8 x12: 0000ffff785cc9d0
x11: 0000000000000090 x10: 00000000ffffffff
x9 : 0000ffff785c6e40 x8 : 0000ffff785c55f0
x7 : 0000000000000004 x6 : 0000000000000002
x5 : 0000000000000022 x4 : 0000000000000000
x3 : 0000ffff785d6a50 x2 : 0000ffff7856f1e8
x1 : 0000000000000003 x0 : 0000000000000000

Internal error: Oops - bad mode: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 2019060416 Comm:  Not tainted 4.6.0-rc1+ #15
Hardware name: linux,dummy-virt (DT)
task: 0000ffff785d68c0 ti: 0000ffffda527ab0 task.ti:           (null)
PC is at 0xffff785b642c
LR is at 0xffff785b646c
pc : [<0000ffff785b642c>] lr : [<0000ffff785b646c>] pstate: 20000005
sp : ffff8003700c7ff0
x29: 0000ffffda527ab0 x28: 0000000002bc3ef8
x27: 0000ffffda527c70 x26: 0000ffff785d9000
x25: 0000ffff785d6568 x24: 0000ffffda527c80
x23: 00000000af0fbe22 x22: 0000000000000000
x21: 000000000000000b x20: 0000ffff785ca660
x19: 0000ffffda527b60 x18: 0000ffffda527b60
x17: 0000ffff785c18a8 x16: 0000ffff785da000
x15: 0000ffff785da000 x14: 0000000000000041
x13: 0000ffff785acca8 x12: 0000ffff785cc9d0
x11: 0000000000000090 x10: 00000000ffffffff
x9 : 0000ffff785c6e40 x8 : 0000ffff785c55f0
x7 : 0000000000000004 x6 : 0000000000000002
x5 : 0000000000000022 x4 : 0000000000000000
x3 : 0000ffff785d6a50 x2 : 0000ffff7856f1e8
x1 : 0000000000000003 x0 : 0000000000000000

Process  (pid: 2019060416, stack limit = 0x0000ffffda527ad0)
Stack: (0xffff8003700c7ff0 to 0x0000000000004000)
Call trace:
[<0000ffff785b642c>] 0xffff785b642c
Code: 9ac72487 9ac52484 8a0400e4 37002004 (b9003a7f)
Unable to handle kernel paging request at virtual address 642d68696e626a8c
pgd = ffff000008938000
[642d68696e626a8c] *pgd=0000000000000000
Internal error: Oops: 96000004 [#2] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 2019060416 Comm:  Tainted: G      D         4.6.0-rc1+ #15
Hardware name: linux,dummy-virt (DT)
task: 0000ffff785d68c0 ti: 0000ffffda527ab0 task.ti:           (null)
PC is at account_system_time+0x48/0x17c
LR is at account_process_tick+0x5c/0x118
pc : [<ffff0000080e0498>] lr : [<ffff0000080e07d8>] pstate: 600001c5
sp : ffff8003700c7a30
x29: ffff8003700c7a30 x28: 0000ffffda527ab0
x27: ffff00000811596c x26: 0000000000000001
x25: ffff0000088ffb5e x24: 0000000038ae508c
x23: 0000000000000001 x22: 0000000038ae508c
x21: 000080037772c000 x20: 0000ffff785d68c0
x19: ffff80037ffb1000 x18: 0000ffffda527b60
x17: 0000ffff785c18a8 x16: 0000ffff785da000
x15: 0000ffff785da000 x14: 0000000000000008
x13: 0000000000000000 x12: 0098968000000000
x11: 0000000000989680 x10: 0000000000000000
x9 : 0000989680000000 x8 : 000000000007a120
x7 : 00000000388a7f40 x6 : 0000000000000000
x5 : 0000000000000002 x4 : 642d68696e62696c
x3 : 0000000000000001 x2 : 0000000000000001
x1 : 0000ffff785d6da9 x0 : 0000ffff785d68c0

Process  (pid: 2019060416, stack limit = 0x0000ffffda527ad0)
Stack: (0xffff8003700c7a30 to 0x0000000000004000)
Call trace:
Exception stack(0xffff8003700c7870 to 0xffff8003700c7990)
7860:                                   ffff80037ffb1000 0000ffff785d68c0
7880: ffff8003700c7a30 ffff0000080e0498 ffff8003700c78c0 00000000ffffffd0
78a0: ffff8003700c78f0 ffff8003700c78f0 ffff8003700c78c0 00000000ffffffd0
78c0: 0000ffff785b642c ffff8003700c7938 0000ffff785b642c 0000ffffda527ab0
78e0: 0000000000000004 0000000000000004 ffff8003700c7950 ffff00000812024c
7900: ffff8003700c79a0 ffff000008910460 0000ffff785d68c0 0000ffff785d6da9
7920: 0000000000000001 0000000000000001 642d68696e62696c 0000000000000002
7940: 0000000000000000 00000000388a7f40 000000000007a120 0000989680000000
7960: 0000000000000000 0000000000989680 0098968000000000 0000000000000000
7980: 0000000000000008 0000ffff785da000
[<ffff0000080e0498>] account_system_time+0x48/0x17c
[<ffff0000080e07d8>] account_process_tick+0x5c/0x118
[<ffff000008107110>] update_process_times+0x28/0x68
[<ffff00000811595c>] tick_sched_handle.isra.15+0x3c/0x4c
[<ffff0000081159b0>] tick_sched_timer+0x44/0x7c
[<ffff000008107828>] __hrtimer_run_queues+0xe8/0x14c
[<ffff000008107dbc>] hrtimer_interrupt+0x9c/0x1e0
[<ffff00000850bedc>] arch_timer_handler_virt+0x2c/0x38
[<ffff0000080fa5d8>] handle_percpu_devid_irq+0x78/0x98
[<ffff0000080f6120>] generic_handle_irq+0x24/0x38
[<ffff0000080f6458>] __handle_domain_irq+0x60/0xac
[<ffff0000080824c8>] gic_handle_irq+0x5c/0xb0
Exception stack(0xffff8003700c7c80 to 0xffff8003700c7da0)
7c80: ffff8003700c7cb0 0000000000000000 ffff8003700c7dd0 ffff00000863cee0
7ca0: 0000000060000145 0000ffff785d68c0 ffff0000089040e8 0000000000000001
7cc0: 0000000000000080 0000000000000080 ffff0000088cb8d8 ffff000008397aa0
7ce0: 0000000000000001 3037332034653030 0000000000000423 0000000000000422
7d00: 0000000000000000 0000000000000006 3634366235383766 61747370205d3e63
7d20: 30303032203a6574 0000ffff785da000 0000ffff785da000 0000ffff785c18a8
7d40: 0000ffffda527b60 ffff000008904000 0000000000000000 ffff000008773660
7d60: ffff8003700c7ed0 0000ffffda527ab0 0000ffff785d68c0 0000ffff785d6568
7d80: 0000ffff785d9000 0000ffffda527c70 0000000002bc3ef8 ffff8003700c7dd0
[<ffff000008085720>] el1_irq+0xa0/0x10c
[<ffff000008089a9c>] die+0xc4/0x1b4
[<ffff000008089c50>] arm64_notify_die+0x1c/0x54
[<ffff000008089e9c>] bad_mode+0x8c/0x98
[<0000ffff785b646c>] 0xffff785b646c
Code: 8b020021 8b0300c3 f9028801 f9029003 (39448081)
---[ end trace a804f7bbe0c75c09 ]---
Kernel panic - not syncing: Fatal exception in interrupt
Kernel Offset: disabled
Memory Limit: none
---[ end Kernel panic - not syncing: Fatal exception in interrupt