======================================
| [ 547.091316][ T1033] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [  547.091505][ T1033]
| [  547.091587][ T1033]
| [  547.091587][ T1033] stack backtrace:
[  547.092018][ T1033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  547.092401][ T1033] Call Trace:
[  547.092539][ T1033]  <TASK>
[ 547.092616][ T1033] dump_stack_lvl (lib/dump_stack.c:117) 
[ 547.092792][ T1033] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) 
[ 547.092957][ T1033] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 547.093232][ T1033] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) 
[ 547.093421][ T1033] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 547.093571][ T1033] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 547.093682][ T1033] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 547.093952][ T1033] check_irq_usage (kernel/locking/lockdep.c:2871) 
[ 547.094104][ T1033] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) 
[ 547.094265][ T1033] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 547.094403][ T1033] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) 
[ 547.094559][ T1033] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[ 547.094728][ T1033] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[ 547.094903][ T1033] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) 
[ 547.095054][ T1033] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 547.095227][ T1033] ? stack_depot_save_flags (lib/stackdepot.c:671) 
[ 547.095389][ T1033] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 547.095560][ T1033] ? check_prev_add (kernel/locking/lockdep.c:3138) 
[ 547.095721][ T1033] check_prev_add (kernel/locking/lockdep.c:3138) 
[ 547.095906][ T1033] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 547.096150][ T1033] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) 
[ 547.096322][ T1033] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 547.096435][ T1033] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 547.096599][ T1033] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 547.096775][ T1033] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 547.096997][ T1033] __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 547.097163][ T1033] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 547.097318][ T1033] ? __get_task_comm (fs/exec.c:1234) 
[ 547.097474][ T1033] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 547.097600][ T1033] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 547.097781][ T1033] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 547.097931][ T1033] ? __get_task_comm (fs/exec.c:1234) 
[ 547.098101][ T1033] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 547.098252][ T1033] ? __get_task_comm (fs/exec.c:1234) 
[ 547.098417][ T1033] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 547.098593][ T1033] ? __get_task_comm (fs/exec.c:1234) 
[ 547.098744][ T1033] __get_task_comm (fs/exec.c:1234) 
[ 547.098916][ T1033] ref_tracker_alloc (lib/ref_tracker.c:217) 
[ 547.099174][ T1033] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) 
[ 547.099360][ T1033] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 547.099509][ T1033] ? rt6_uncached_list_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv6/route.c:185) 
[ 547.099715][ T1033] ? rt6_disable_ip (net/ipv6/route.c:4910) 
[ 547.099975][ T1033] ? addrconf_ifdown.isra.0 (./include/net/addrconf.h:324 net/ipv6/addrconf.c:3856) 
[ 547.100147][ T1033] ? addrconf_notify (net/ipv6/addrconf.c:3811) 
[ 547.100296][ T1033] ? notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[ 547.100471][ T1033] ? dev_close_many (net/core/dev.c:1571) 
[ 547.100632][ T1033] ? unregister_netdevice_many_notify (net/core/dev.c:11146) 
[ 547.100825][ T1033] ? unregister_netdevice_queue (net/core/dev.c:11108) 
[ 547.101035][ T1033] ? nsim_destroy (drivers/net/netdevsim/netdev.c:502 (discriminator 2)) netdevsim
[ 547.101216][ T1033] ? __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1426) netdevsim
[ 547.101433][ T1033] ? nsim_drv_port_del (drivers/net/netdevsim/dev.c:1729) netdevsim
[ 547.101641][ T1033] ? del_port_store (drivers/net/netdevsim/bus.c:100) netdevsim
[ 547.101869][ T1033] ? kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 547.102136][ T1033] ? vfs_write (./include/linux/fs.h:2108 fs/read_write.c:497 fs/read_write.c:590) 
[ 547.102289][ T1033] ? ksys_write (fs/read_write.c:643) 
[ 547.102471][ T1033] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 547.102648][ T1033] ? in6_dev_get (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/addrconf.h:373) 
[ 547.102905][ T1033] rt6_uncached_list_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv6/route.c:185) 
[ 547.103322][ T1033] rt6_disable_ip (net/ipv6/route.c:4910) 
[ 547.103488][ T1033] ? __pfx_rt6_disable_ip (net/ipv6/route.c:4907) 
[ 547.103652][ T1033] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 547.103818][ T1033] addrconf_ifdown.isra.0 (./include/net/addrconf.h:324 net/ipv6/addrconf.c:3856) 
[ 547.104077][ T1033] ? __try_to_del_timer_sync (kernel/time/timer.c:1500) 
[ 547.104245][ T1033] ? __pfx_addrconf_ifdown.isra.0 (net/ipv6/addrconf.c:3841) 
[ 547.104448][ T1033] addrconf_notify (net/ipv6/addrconf.c:3811) 
[ 547.104611][ T1033] ? fib_netdev_event (net/ipv4/fib_frontend.c:1520) 
[ 547.104872][ T1033] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[ 547.105038][ T1033] dev_close_many (net/core/dev.c:1571) 
[ 547.105205][ T1033] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:129) 
[ 547.105366][ T1033] ? __pfx_dev_close_many (net/core/dev.c:1558) 
[ 547.105626][ T1033] unregister_netdevice_many_notify (net/core/dev.c:11146) 
[ 547.105829][ T1033] ? nsim_destroy (drivers/net/netdevsim/netdev.c:497) netdevsim
[ 547.106000][ T1033] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 547.106165][ T1033] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 547.106418][ T1033] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11113) 
[ 547.106624][ T1033] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 547.106790][ T1033] ? nsim_drv_port_del (drivers/net/netdevsim/dev.c:43 drivers/net/netdevsim/dev.c:1694 drivers/net/netdevsim/dev.c:1724) netdevsim
[ 547.107007][ T1033] ? nsim_destroy (drivers/net/netdevsim/netdev.c:497) netdevsim
[ 547.107273][ T1033] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:129) 
[ 547.107436][ T1033] unregister_netdevice_queue (net/core/dev.c:11108) 
[ 547.107603][ T1033] ? nsim_drv_port_del (drivers/net/netdevsim/dev.c:43 drivers/net/netdevsim/dev.c:1694 drivers/net/netdevsim/dev.c:1724) netdevsim
[ 547.107816][ T1033] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11097) 
[ 547.108110][ T1033] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 547.108283][ T1033] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:129) 
[ 547.108445][ T1033] nsim_destroy (drivers/net/netdevsim/netdev.c:502 (discriminator 2)) netdevsim
[ 547.108618][ T1033] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1426) netdevsim
[ 547.108925][ T1033] nsim_drv_port_del (drivers/net/netdevsim/dev.c:1729) netdevsim
[ 547.109138][ T1033] del_port_store (drivers/net/netdevsim/bus.c:100) netdevsim
[ 547.109312][ T1033] ? __pfx_del_port_store (drivers/net/netdevsim/bus.c:88) netdevsim
[ 547.109617][ T1033] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:129) 
[ 547.109781][ T1033] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 547.109944][ T1033] ? sysfs_kf_write (fs/sysfs/file.c:130) 
[ 547.110119][ T1033] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 547.110410][ T1033] vfs_write (./include/linux/fs.h:2108 fs/read_write.c:497 fs/read_write.c:590) 
[ 547.110538][ T1033] ? __pfx_locks_remove_posix (fs/locks.c:2608) 
[ 547.110726][ T1033] ? __pfx_vfs_write (fs/read_write.c:571) 
[ 547.110888][ T1033] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 547.111059][ T1033] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 547.111357][ T1033] ksys_write (fs/read_write.c:643) 
[ 547.111504][ T1033] ? __pfx_ksys_write (fs/read_write.c:633) 
[ 547.111672][ T1033] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 547.111853][ T1033] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  547.112173][ T1033] RIP: 0033:0x7f0e30d42957
[ 547.112365][ T1033] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
All code
========
   0:	0b 00                	or     (%rax),%eax
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b7                	jmp    0xffffffffffffffc7
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 01 00 00 00       	mov    $0x1,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	74 24                	je     0x64

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	74 24                	je     0x3a
[  547.112971][ T1033] RSP: 002b:00007ffdbc832bf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  547.113236][ T1033] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0e30d42957
[  547.113489][ T1033] RDX: 0000000000000002 RSI: 0000560d59dba8c0 RDI: 0000000000000001
[  547.113846][ T1033] RBP: 0000560d59dba8c0 R08: 0000000000000000 R09: 00007f0e30db54e0
[  547.114103][ T1033] R10: 00007f0e30db53e0 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
dump_stack_lvl:print_bad_irq_dependency:check_irq_usage:check_prev_add