======================================
| [ 56.691581][ T535] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   56.691833][  T535]
| [   56.691905][  T535]
| [   56.691905][  T535] stack backtrace:
[   56.692285][  T535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   56.692670][  T535] Call Trace:
[   56.692774][  T535]  <TASK>
[ 56.692846][ T535] dump_stack_lvl (lib/dump_stack.c:117) 
[ 56.692990][ T535] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) 
[ 56.693212][ T535] ? 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) 
[ 56.693351][ T535] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) 
[ 56.693529][ T535] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 56.693666][ T535] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 56.693926][ T535] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 56.694066][ T535] check_irq_usage (kernel/locking/lockdep.c:2871) 
[ 56.694223][ T535] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) 
[ 56.694360][ T535] ? __bfs (kernel/locking/lockdep.c:1787) 
[ 56.694464][ T535] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) 
[ 56.694603][ T535] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) 
[ 56.694745][ T535] ? check_noncircular (kernel/locking/lockdep.c:2172) 
[ 56.694892][ T535] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) 
[ 56.695034][ T535] ? check_prev_add (kernel/locking/lockdep.c:3138) 
[ 56.695184][ T535] check_prev_add (kernel/locking/lockdep.c:3138) 
[ 56.695325][ T535] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 56.695461][ T535] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) 
[ 56.695597][ T535] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 56.695702][ T535] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 56.696020][ T535] ? 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) 
[ 56.696164][ T535] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 56.696278][ T535] __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 56.696416][ T535] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 56.696552][ T535] ? __get_task_comm (fs/exec.c:1234) 
[ 56.696689][ T535] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 56.696791][ T535] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 56.696927][ T535] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 56.697063][ T535] ? __get_task_comm (fs/exec.c:1234) 
[ 56.697215][ T535] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 56.697350][ T535] ? __get_task_comm (fs/exec.c:1234) 
[ 56.697485][ T535] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 56.697619][ T535] ? __get_task_comm (fs/exec.c:1234) 
[ 56.697833][ T535] __get_task_comm (fs/exec.c:1234) 
[ 56.697972][ T535] ref_tracker_alloc (lib/ref_tracker.c:217) 
[ 56.698130][ T535] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) 
[ 56.698266][ T535] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) 
[ 56.698481][ T535] ? netdev_get_by_index (net/core/dev.c:914) 
[ 56.698622][ T535] ? fib6_nh_init (net/ipv6/route.c:3541) 
[ 56.698757][ T535] ? ip6_route_info_create (net/ipv6/route.c:3808) 
[ 56.698892][ T535] ? addrconf_f6i_alloc (net/ipv6/route.c:4584) 
[ 56.699119][ T535] ? __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) 
[ 56.699256][ T535] ? addrconf_join_anycast (net/ipv6/addrconf.c:2264) 
[ 56.699390][ T535] ? dev_forward_change (./include/linux/list.h:373 net/ipv6/addrconf.c:833) 
[ 56.699525][ T535] ? addrconf_fixup_forwarding (net/ipv6/addrconf.c:854 net/ipv6/addrconf.c:898) 
[ 56.699775][ T535] ? addrconf_sysctl_forward (net/ipv6/addrconf.c:6329) 
[ 56.699911][ T535] ? proc_sys_call_handler (fs/proc/proc_sysctl.c:595) 
[ 56.700048][ T535] ? vfs_write (./include/linux/fs.h:2108 fs/read_write.c:497 fs/read_write.c:590) 
[ 56.700190][ T535] ? ksys_write (fs/read_write.c:643) 
[ 56.700325][ T535] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 56.700539][ T535] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 56.700705][ T535] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) 
[ 56.700841][ T535] netdev_get_by_index (net/core/dev.c:914) 
[ 56.700983][ T535] fib6_nh_init (net/ipv6/route.c:3541) 
[ 56.701227][ T535] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 56.701396][ T535] ? __pfx_fib6_nh_init (net/ipv6/route.c:3522) 
[ 56.701531][ T535] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 56.701668][ T535] ? __kasan_kmalloc (mm/kasan/common.c:391) 
[ 56.701882][ T535] ? __kmalloc (mm/slub.c:3980) 
[ 56.702021][ T535] ? fib6_get_table (net/ipv6/ip6_fib.c:295) 
[ 56.702157][ T535] ip6_route_info_create (net/ipv6/route.c:3808) 
[ 56.702298][ T535] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 56.702517][ T535] ? __pfx_ip6_route_info_create (net/ipv6/route.c:3691) 
[ 56.702685][ T535] ? addrconf_f6i_alloc (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/l3mdev.h:138 net/ipv6/route.c:4564) 
[ 56.702824][ T535] addrconf_f6i_alloc (net/ipv6/route.c:4584) 
[ 56.702962][ T535] ? __pfx_addrconf_f6i_alloc (net/ipv6/route.c:4562) 
[ 56.703193][ T535] ? do_raw_write_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qrwlock.h:98 kernel/locking/spinlock_debug.c:211) 
[ 56.703328][ T535] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) 
[ 56.703464][ T535] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 56.703605][ T535] __ipv6_dev_ac_inc (net/ipv6/anycast.c:309) 
[ 56.703822][ T535] addrconf_join_anycast (net/ipv6/addrconf.c:2264) 
[ 56.703960][ T535] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 56.704066][ T535] ? __pfx_addrconf_join_anycast (net/ipv6/addrconf.c:2256) 
[ 56.704235][ T535] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 56.704484][ T535] dev_forward_change (./include/linux/list.h:373 net/ipv6/addrconf.c:833) 
[ 56.704620][ T535] ? __pfx_dev_forward_change (net/ipv6/addrconf.c:803) 
[ 56.704758][ T535] addrconf_fixup_forwarding (net/ipv6/addrconf.c:854 net/ipv6/addrconf.c:898) 
[ 56.704911][ T535] addrconf_sysctl_forward (net/ipv6/addrconf.c:6329) 
[ 56.705126][ T535] ? __pfx_addrconf_sysctl_forward (net/ipv6/addrconf.c:6312) 
[ 56.705296][ T535] ? __pfx_addrconf_sysctl_forward (net/ipv6/addrconf.c:6312) 
[ 56.705464][ T535] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 56.705597][ T535] ? __kmalloc_node (mm/slub.c:3974) 
[ 56.705811][ T535] ? proc_sys_call_handler (fs/proc/proc_sysctl.c:578) 
[ 56.705951][ T535] proc_sys_call_handler (fs/proc/proc_sysctl.c:595) 
[ 56.706090][ T535] ? __pfx_proc_sys_call_handler (fs/proc/proc_sysctl.c:550) 
[ 56.706265][ T535] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 56.706562][ T535] vfs_write (./include/linux/fs.h:2108 fs/read_write.c:497 fs/read_write.c:590) 
[ 56.706666][ T535] ? do_user_addr_fault (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/mm.h:700 arch/x86/mm/fault.c:1364) 
[ 56.706802][ T535] ? __pfx_vfs_write (fs/read_write.c:571) 
[ 56.706940][ T535] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 56.707077][ T535] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 56.707301][ T535] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 56.707444][ T535] ksys_write (fs/read_write.c:643) 
[ 56.707547][ T535] ? __pfx_ksys_write (fs/read_write.c:633) 
[ 56.707681][ T535] ? do_user_addr_fault (./include/linux/rcupdate.h:815 ./include/linux/mm.h:702 arch/x86/mm/fault.c:1364) 
[ 56.707904][ T535] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 56.708042][ T535] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   56.708209][  T535] RIP: 0033:0x7f9c645a1957
[ 56.708352][ T535] 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
[   56.708840][  T535] RSP: 002b:00007ffefe4500b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   56.709047][  T535] RAX: ffffffffffffffda RBX: 00005627841fe360 RCX: 00007f9c645a1957
[   56.709249][  T535] RDX: 0000000000000002 RSI: 00005627841fe3a0 RDI: 0000000000000005
[   56.709455][  T535] RBP: 00005627842004d0 R08: 0000000000000003 R09: 0000000000000077
[   56.709746][  T535] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002


Finger prints:
dump_stack_lvl:print_bad_irq_dependency:check_irq_usage:check_prev_add