======================================
| [ 21.251151][ C3] #0: ffff8880052c0220 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff (./include/linux/mmap_lock.h:153 mm/util.c:573) 
| [ 21.251768][ C3] #1: ffffc90000290d60 ((&n->timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
| [   21.252827][    C3]
| [   21.252827][    C3] stack backtrace:
[   21.253236][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.253239][    C3] Call Trace:
[   21.253242][    C3]  <IRQ>
[ 21.253246][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 21.253260][ C3] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) 
[ 21.253277][ C3] icmp6_send (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv6/icmp.c:476) 
[ 21.253312][ C3] ? __pfx_icmp6_send (net/ipv6/icmp.c:452) 
[ 21.253328][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) 
[ 21.253336][ C3] ? 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:230) 
[ 21.253341][ C3] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 21.253362][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[ 21.253372][ C3] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 21.253383][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 21.253388][ C3] ? neigh_invalidate (net/core/neighbour.c:1008) 
[ 21.253397][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 21.253404][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853) 
[ 21.253425][ C3] ip6_link_failure (./include/linux/skbuff.h:1152 net/ipv6/route.c:2801) 
[ 21.253439][ C3] ndisc_error_report (./include/net/dst.h:429 net/ipv6/ndisc.c:731) 
[ 21.253452][ C3] neigh_invalidate (net/core/neighbour.c:1008) 
[ 21.253468][ C3] neigh_timer_handler (net/core/neighbour.c:1109 (discriminator 2)) 
[ 21.253487][ C3] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 21.253493][ C3] call_timer_fn (kernel/time/timer.c:1789) 
[ 21.253500][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 21.253504][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 21.253512][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) 
[ 21.253518][ C3] ? 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:230) 
[ 21.253531][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[ 21.253552][ C3] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) 
[ 21.253559][ C3] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 21.253578][ C3] ? __pfx___run_timers (kernel/time/timer.c:2385) 
[ 21.253582][ C3] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 21.253597][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 21.253608][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 21.253616][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 21.253620][ C3] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 21.253638][ C3] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 21.253647][ C3] handle_softirqs (kernel/softirq.c:561) 
[ 21.253670][ C3] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) 
[ 21.253676][ C3] irq_exit_rcu (kernel/softirq.c:680) 
[ 21.253680][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   21.253688][    C3]  </IRQ>
[   21.253689][    C3]  <TASK>
[ 21.253694][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.253702][ C3] RIP: 0010:find_stack (lib/stackdepot.c:572 (discriminator 11)) 
[ 21.253711][ C3] Code: 41 89 d6 41 55 41 89 cd 41 54 55 48 89 fd 53 48 89 f3 65 ff 05 28 b2 88 65 e8 8b 2e 96 01 85 c0 0f 85 8a 00 00 00 4c 8b 65 00 <41> 83 e7 02 44 89 f2 4c 39 e5 75 0b eb 73 4d 8b 24 24 49 39 ec 74
All code
========
   0:	41 89 d6             	mov    %edx,%r14d
   3:	41 55                	push   %r13
   5:	41 89 cd             	mov    %ecx,%r13d
   8:	41 54                	push   %r12
   a:	55                   	push   %rbp
   b:	48 89 fd             	mov    %rdi,%rbp
   e:	53                   	push   %rbx
   f:	48 89 f3             	mov    %rsi,%rbx
  12:	65 ff 05 28 b2 88 65 	incl   %gs:0x6588b228(%rip)        # 0x6588b241
  19:	e8 8b 2e 96 01       	call   0x1962ea9
  1e:	85 c0                	test   %eax,%eax
  20:	0f 85 8a 00 00 00    	jne    0xb0
  26:	4c 8b 65 00          	mov    0x0(%rbp),%r12
  2a:*	41 83 e7 02          	and    $0x2,%r15d		<-- trapping instruction
  2e:	44 89 f2             	mov    %r14d,%edx
  31:	4c 39 e5             	cmp    %r12,%rbp
  34:	75 0b                	jne    0x41
  36:	eb 73                	jmp    0xab
  38:	4d 8b 24 24          	mov    (%r12),%r12
  3c:	49 39 ec             	cmp    %rbp,%r12
  3f:	74                   	.byte 0x74

Code starting with the faulting instruction
===========================================
   0:	41 83 e7 02          	and    $0x2,%r15d
   4:	44 89 f2             	mov    %r14d,%edx
   7:	4c 39 e5             	cmp    %r12,%rbp
   a:	75 0b                	jne    0x17
   c:	eb 73                	jmp    0x81
   e:	4d 8b 24 24          	mov    (%r12),%r12
  12:	49 39 ec             	cmp    %rbp,%r12
  15:	74                   	.byte 0x74
[   21.253716][    C3] RSP: 0018:ffffc90000897640 EFLAGS: 00000202
[   21.253721][    C3] RAX: 0000000000000001 RBX: ffffc900008976d0 RCX: 0000000000000001
[   21.253725][    C3] RDX: 0000000000000000 RSI: ffffffff9d15abe0 RDI: ffff88800d9b2d48
[   21.253728][    C3] RBP: ffff88803509d100 R08: 0000000000000001 R09: fffffbfff3b72232
[   21.253731][    C3] R10: ffffffff9db91197 R11: ffff88800d9b2300 R12: ffff888004d889d0
[   21.253735][    C3] R13: 00000000e0419d10 R14: 000000000000000b R15: 0000000000000001
[ 21.253770][ C3] stack_depot_save_flags (lib/stackdepot.c:618) 
[ 21.253789][ C3] kasan_save_stack (mm/kasan/common.c:49) 
[ 21.253797][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 21.253802][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 21.253806][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 21.253811][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4115 mm/slub.c:4164 mm/slub.c:4171) 
[ 21.253818][ C3] ? vm_area_alloc (kernel/fork.c:472) 
[ 21.253824][ C3] ? __mmap_region (mm/vma.c:2342 mm/vma.c:2457) 
[ 21.253830][ C3] ? do_mmap (mm/mmap.c:561) 
[ 21.253835][ C3] ? vm_mmap_pgoff (mm/util.c:575) 
[ 21.253842][ C3] ? ksys_mmap_pgoff (mm/mmap.c:607) 
[ 21.253846][ C3] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 21.253854][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 21.253863][ C3] ? stack_depot_save_flags (lib/stackdepot.c:618) 
[ 21.253869][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[ 21.253884][ C3] ? set_track_prepare (mm/slub.c:938) 
[ 21.253892][ C3] ? vm_area_alloc (kernel/fork.c:472) 
[ 21.253896][ C3] ? __mmap_region (mm/vma.c:2342 mm/vma.c:2457) 
[ 21.253901][ C3] ? do_mmap (mm/mmap.c:561) 
[ 21.253904][ C3] ? vm_mmap_pgoff (mm/util.c:575) 
[ 21.253908][ C3] ? ksys_mmap_pgoff (mm/mmap.c:607) 
[ 21.253911][ C3] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 21.253916][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 21.253934][ C3] ? ___slab_alloc (mm/slub.c:967 mm/slub.c:3816) 
[ 21.253940][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 21.253944][ C3] ? vm_area_alloc (kernel/fork.c:472) 
[ 21.253951][ C3] ? ___slab_alloc (mm/slub.c:3658) 
[ 21.253978][ C3] kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 21.253984][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 21.253995][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4115 mm/slub.c:4164 mm/slub.c:4171) 
[ 21.254001][ C3] ? vma_merge_new_range (mm/vma.c:987) 
[ 21.254018][ C3] vm_area_alloc (kernel/fork.c:472) 
[ 21.254025][ C3] __mmap_region (mm/vma.c:2342 mm/vma.c:2457) 
[ 21.254040][ C3] ? __pfx___mmap_region (mm/vma.c:2437) 
[ 21.254045][ C3] ? mas_prev (lib/maple_tree.c:5840 lib/maple_tree.c:5833) 
[ 21.254065][ C3] ? mas_find (lib/maple_tree.c:6020) 
[ 21.254094][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.254101][ C3] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 21.254186][ C3] ? mmap_region (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/mman.h:204 mm/vma.c:2519) 
[ 21.254203][ C3] do_mmap (mm/mmap.c:561) 
[ 21.254223][ C3] ? __pfx_do_mmap (mm/mmap.c:342) 
[ 21.254227][ C3] ? down_write_killable (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2629 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3224 kernel/locking/rwsem.c:143 kernel/locking/rwsem.c:268 kernel/locking/rwsem.c:1303 kernel/locking/rwsem.c:1318 kernel/locking/rwsem.c:1590) 
[ 21.254237][ C3] ? __pfx_down_write_killable (kernel/locking/rwsem.c:1586) 
[ 21.254246][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 21.254261][ C3] vm_mmap_pgoff (mm/util.c:575) 
[ 21.254281][ C3] ? __pfx_vm_mmap_pgoff (mm/util.c:565) 
[ 21.254295][ C3] ? __fget_files (fs/file.c:1054) 
[ 21.254317][ C3] ksys_mmap_pgoff (mm/mmap.c:607) 
[ 21.254335][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 21.254346][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.254351][    C3] RIP: 0033:0x7fdeafcb1116
[ 21.254358][ C3] Code: 5d 41 5c c3 f3 0f 1e fa 41 f7 c1 ff 0f 00 00 75 2b 55 48 89 fd 53 89 cb 48 85 ff 74 37 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 62 5b 5d c3 0f 1f 80 00 00 00 00 c7 05 ae f0
All code
========
   0:	5d                   	pop    %rbp
   1:	41 5c                	pop    %r12
   3:	c3                   	ret
   4:	f3 0f 1e fa          	endbr64
   8:	41 f7 c1 ff 0f 00 00 	test   $0xfff,%r9d
   f:	75 2b                	jne    0x3c
  11:	55                   	push   %rbp
  12:	48 89 fd             	mov    %rdi,%rbp
  15:	53                   	push   %rbx
  16:	89 cb                	mov    %ecx,%ebx
  18:	48 85 ff             	test   %rdi,%rdi
  1b:	74 37                	je     0x54
  1d:	41 89 da             	mov    %ebx,%r10d
  20:	48 89 ef             	mov    %rbp,%rdi
  23:	b8 09 00 00 00       	mov    $0x9,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 62                	ja     0x94
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	c3                   	ret
  35:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3c:	c7                   	.byte 0xc7
  3d:	05                   	.byte 0x5
  3e:	ae                   	scas   %es:(%rdi),%al
  3f:	f0                   	lock

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 62                	ja     0x6a
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	c3                   	ret
   b:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  12:	c7                   	.byte 0xc7
  13:	05                   	.byte 0x5
  14:	ae                   	scas   %es:(%rdi),%al
  15:	f0                   	lock
[   21.254363][    C3] RSP: 002b:00007ffe23f6a318 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
[   21.254368][    C3] RAX: ffffffffffffffda RBX: 0000000000000802 RCX: 00007fdeafcb1116
[   21.254371][    C3] RDX: 0000000000000001 RSI: 0000000000207f90 RDI: 0000000000000000
[   21.254374][    C3] RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
[   21.254377][    C3] R10: 0000000000000802 R11: 0000000000000246 R12: 0000000000000fff


Finger prints:
lockdep_rcu_suspicious:icmp6_send:ip6_link_failure:ndisc_error_report:neigh_invalidate