======================================
| [  106.878434][    C1] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
| [  106.878890][    C1] ------------[ cut here ]------------
| [  106.879193][    C1] kernel BUG at include/linux/mm.h:1140!
| [  106.879503][    C1] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[  106.880221][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 106.880807][ C1] RIP: 0010:__free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.881055][ C1] Code: 0f 94 c3 e9 ba fe ff ff 48 c7 c6 a0 18 58 96 4c 89 e7 e8 df bf f4 ff 90 0f 0b 48 c7 c6 40 29 58 96 4c 89 e7 e8 cd bf f4 ff 90 <0f> 0b 48 89 ef e8 72 03 09 00 e9 c5 fe ff ff e8 98 03 09 00 e9 35
All code
========
   0:	0f 94 c3             	sete   %bl
   3:	e9 ba fe ff ff       	jmp    0xfffffffffffffec2
   8:	48 c7 c6 a0 18 58 96 	mov    $0xffffffff965818a0,%rsi
   f:	4c 89 e7             	mov    %r12,%rdi
  12:	e8 df bf f4 ff       	call   0xfffffffffff4bff6
  17:	90                   	nop
  18:	0f 0b                	ud2
  1a:	48 c7 c6 40 29 58 96 	mov    $0xffffffff96582940,%rsi
  21:	4c 89 e7             	mov    %r12,%rdi
  24:	e8 cd bf f4 ff       	call   0xfffffffffff4bff6
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 89 ef             	mov    %rbp,%rdi
  2f:	e8 72 03 09 00       	call   0x903a6
  34:	e9 c5 fe ff ff       	jmp    0xfffffffffffffefe
  39:	e8 98 03 09 00       	call   0x903d6
  3e:	e9                   	.byte 0xe9
  3f:	35                   	.byte 0x35

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 89 ef             	mov    %rbp,%rdi
   5:	e8 72 03 09 00       	call   0x9037c
   a:	e9 c5 fe ff ff       	jmp    0xfffffffffffffed4
   f:	e8 98 03 09 00       	call   0x903ac
  14:	e9                   	.byte 0xe9
  15:	35                   	.byte 0x35
[  106.881847][    C1] RSP: 0018:ffffc900001e8df8 EFLAGS: 00010246
[  106.882173][    C1] RAX: 000000000000003e RBX: 0000000000000000 RCX: 1ffffffff2e3b43c
[  106.882424][    C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  106.882701][    C1] RBP: ffffea000018ee74 R08: 0000000000000000 R09: fffffbfff2e3b43c
[  106.882951][    C1] R10: 0000000000000003 R11: 205d314320202020 R12: ffffea000018ee40
[  106.883204][    C1] R13: ffffc900001e8ec0 R14: 0000000000000000 R15: 0000000000000006
[  106.883447][    C1] FS:  00007f8b3bc0f740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[  106.883731][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  106.883941][    C1] CR2: 00007f9941897000 CR3: 000000000ad1e002 CR4: 0000000000772ef0
[  106.884197][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  106.884530][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  106.884757][    C1] PKRU: 55555554
[  106.884895][    C1] Call Trace:
[  106.885035][    C1]  <IRQ>
[ 106.885128][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 106.885266][ C1] ? do_trap (arch/x86/kernel/traps.c:156 arch/x86/kernel/traps.c:197) 
[ 106.885399][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.885581][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:218) 
[ 106.885740][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.885901][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.886066][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:256) 
[ 106.886226][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.886383][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:315) 
[ 106.886555][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 106.886707][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.886872][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) 
[ 106.887057][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2567) 
[ 106.887223][ C1] neigh_hash_free_rcu (net/core/neighbour.c:555) 
[ 106.887390][ C1] rcu_do_batch (kernel/rcu/tree.c:2567) 
[ 106.887554][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2491) 
[ 106.887728][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406) 
[ 106.887949][ C1] rcu_core (kernel/rcu/tree.c:2825) 
[ 106.888089][ C1] handle_softirqs (kernel/softirq.c:554) 
[ 106.888268][ C1] irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637 kernel/softirq.c:649) 
[ 106.888406][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1037 arch/x86/kernel/apic/apic.c:1037) 
[  106.888582][    C1]  </IRQ>
[  106.888675][    C1]  <TASK>
[ 106.888755][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 106.888975][ C1] RIP: 0010:ftrace_graph_ret_addr (kernel/trace/fgraph.c:900) 
[ 106.889202][ C1] Code: 83 ec 08 0f b6 0c 01 48 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 70 01 00 00 48 c7 c0 30 36 73 93 44 8b a5 b4 14 00 00 <4c> 39 f8 0f 85 3d 01 00 00 48 85 f6 0f 84 34 01 00 00 48 b8 00 00
All code
========
   0:	83 ec 08             	sub    $0x8,%esp
   3:	0f b6 0c 01          	movzbl (%rcx,%rax,1),%ecx
   7:	48 89 f8             	mov    %rdi,%rax
   a:	83 e0 07             	and    $0x7,%eax
   d:	83 c0 03             	add    $0x3,%eax
  10:	38 c8                	cmp    %cl,%al
  12:	7c 08                	jl     0x1c
  14:	84 c9                	test   %cl,%cl
  16:	0f 85 70 01 00 00    	jne    0x18c
  1c:	48 c7 c0 30 36 73 93 	mov    $0xffffffff93733630,%rax
  23:	44 8b a5 b4 14 00 00 	mov    0x14b4(%rbp),%r12d
  2a:*	4c 39 f8             	cmp    %r15,%rax		<-- trapping instruction
  2d:	0f 85 3d 01 00 00    	jne    0x170
  33:	48 85 f6             	test   %rsi,%rsi
  36:	0f 84 34 01 00 00    	je     0x170
  3c:	48                   	rex.W
  3d:	b8                   	.byte 0xb8
	...

Code starting with the faulting instruction
===========================================
   0:	4c 39 f8             	cmp    %r15,%rax
   3:	0f 85 3d 01 00 00    	jne    0x146
   9:	48 85 f6             	test   %rsi,%rsi
   c:	0f 84 34 01 00 00    	je     0x146
  12:	48                   	rex.W
  13:	b8                   	.byte 0xb8
	...
[  106.889807][    C1] RSP: 0018:ffffc90000ecf360 EFLAGS: 00000246
[  106.890028][    C1] RAX: ffffffff93733630 RBX: 0000000000000001 RCX: 0000000000000000
[  106.890274][    C1] RDX: ffffffff95e18a09 RSI: ffffc90000ecf4d0 RDI: ffff888005d094f4
[  106.890525][    C1] RBP: ffff888005d08040 R08: ffffc90000ecf4e0 R09: 1ffff920001d9e7d
[  106.890779][    C1] R10: ffffc90000ecf4a0 R11: ffffc90000ecf4e1 R12: 0000000000000000
[  106.891041][    C1] R13: ffffc90000ecf4a0 R14: ffffc90000ecf990 R15: ffffffff95e18a09
[ 106.891312][ C1] ? rawv6_send_hdrinc (./include/net/sock.h:1797 net/ipv6/raw.c:614) 
[ 106.891478][ C1] ? ftrace_stub_direct_tramp (arch/x86/kernel/ftrace_64.S:351) 
[ 106.891645][ C1] ? rawv6_send_hdrinc (./include/net/sock.h:1797 net/ipv6/raw.c:614) 
[ 106.891827][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 106.891990][ C1] unwind_next_frame (./arch/x86/include/asm/unwind.h:111 ./arch/x86/include/asm/unwind.h:127 arch/x86/kernel/unwind_orc.c:588) 
[ 106.892169][ C1] ? sock_alloc_send_pskb (net/core/sock.c:2874) 
[ 106.892332][ C1] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 106.892506][ C1] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 106.892679][ C1] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 106.892847][ C1] ? sock_alloc_send_pskb (net/core/sock.c:2874) 
[ 106.893016][ C1] ? kernel_text_address (kernel/extable.c:99) 
[ 106.893191][ C1] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 106.893403][ C1] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 106.893579][ C1] ? rawv6_send_hdrinc (./include/net/sock.h:1797 net/ipv6/raw.c:614) 
[ 106.893762][ C1] stack_trace_save (kernel/stacktrace.c:123) 
[ 106.893961][ C1] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 106.894141][ C1] set_track_prepare (mm/slub.c:945) 
[ 106.894314][ C1] ? kmem_cache_alloc_node_noprof (./include/linux/kmemleak.h:42 mm/slub.c:4089 mm/slub.c:4134 mm/slub.c:4186) 
[ 106.894540][ C1] ? __alloc_skb (net/core/skbuff.c:668) 
[ 106.894719][ C1] ? alloc_skb_with_frags (./include/linux/skbuff.h:1325 net/core/skbuff.c:6622) 
[ 106.894897][ C1] ? sock_alloc_send_pskb (net/core/sock.c:2874) 
[ 106.895068][ C1] ? read_word_at_a_time (./include/asm-generic/rwonce.h:86) 
[ 106.895249][ C1] ? sized_strscpy (lib/string.c:143) 
[ 106.895416][ C1] __alloc_object (mm/kmemleak.c:687) 
[ 106.895591][ C1] __create_object (mm/kmemleak.c:760) 
[ 106.895763][ C1] kmem_cache_alloc_node_noprof (./include/linux/kmemleak.h:42 mm/slub.c:4089 mm/slub.c:4134 mm/slub.c:4186) 
[ 106.895976][ C1] __alloc_skb (net/core/skbuff.c:668) 
[ 106.896151][ C1] ? __pfx___alloc_skb (net/core/skbuff.c:651) 
[ 106.896333][ C1] ? ipv6_dev_get_saddr (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/ipv6/addrconf.c:1901) 
[ 106.896551][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 106.896740][ C1] ? ipv6_get_saddr_eval (./arch/x86/include/asm/bitops.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:29 net/ipv6/addrconf.c:1707) 
[ 106.897000][ C1] alloc_skb_with_frags (./include/linux/skbuff.h:1325 net/core/skbuff.c:6622) 
[ 106.897269][ C1] ? ipv6_dev_get_saddr (net/ipv6/addrconf.c:1810) 
[ 106.897507][ C1] sock_alloc_send_pskb (net/core/sock.c:2874) 
[ 106.897744][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 106.898011][ C1] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2845) 
[ 106.898273][ C1] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3132) 
[ 106.898597][ C1] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 106.898868][ C1] rawv6_send_hdrinc (./include/net/sock.h:1797 net/ipv6/raw.c:614) 
[ 106.899116][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 106.899375][ C1] ? __pfx_rawv6_send_hdrinc (net/ipv6/raw.c:596) 
[ 106.899630][ C1] ? ip6_dst_hoplimit.part.0.isra.0 (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/ipv6/output_core.c:117) 
[ 106.899953][ C1] rawv6_sendmsg (net/ipv6/raw.c:914) 
[ 106.900214][ C1] ? __pfx_rawv6_sendmsg (net/ipv6/raw.c:741) 
[ 106.900473][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 106.900737][ C1] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 106.900995][ C1] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 106.901251][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[ 106.901506][ C1] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[ 106.901753][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[ 106.902008][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[ 106.902267][ C1] ? __sys_sendto (net/socket.c:729 net/socket.c:744 net/socket.c:2214) 
[ 106.902532][ C1] __sys_sendto (net/socket.c:729 net/socket.c:744 net/socket.c:2214) 
[ 106.902787][ C1] ? __pfx___sys_sendto (net/socket.c:2184) 
[ 106.903038][ C1] ? try_to_wake_up (./include/linux/sched.h:2118 kernel/sched/core.c:4280) 
[ 106.903306][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 106.903564][ C1] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[ 106.903820][ C1] ? swake_up_one (./include/linux/list.h:373 kernel/sched/swait.c:25 kernel/sched/swait.c:52) 
[ 106.904075][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406) 
[ 106.904386][ C1] ? __local_bh_enable (kernel/softirq.c:343) 
[ 106.904650][ C1] __x64_sys_sendto (net/socket.c:2222) 
[ 106.904905][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 106.905221][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 106.905487][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  106.905802][    C1] RIP: 0033:0x7f8b3be6985a
[ 106.906074][ C1] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[  106.907029][    C1] RSP: 002b:00007ffd68ac97f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[  106.907412][    C1] RAX: ffffffffffffffda RBX: 0000000019e84ec0 RCX: 00007f8b3be6985a
[  106.907830][    C1] RDX: 0000000000000070 RSI: 0000000019e85160 RDI: 0000000000000005
[  106.908163][    C1] RBP: 0000000019e84ec0 R08: 00007ffd68ac9800 R09: 000000000000001c
[  106.908465][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000070


Finger prints:
__free_pages:neigh_hash_free_rcu:rcu_do_batch:rcu_core:handle_softirqs