======================================
|
| xx__-> [ 1746.254772][    C2] ------------[ cut here ]------------
| [ 1746.255411][ C2] WARNING: CPU: 2 PID: 17024 at ./include/linux/skbuff.h:1164 __xfrm_route_forward (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/xfrm/xfrm_policy.c:3898) 
| [ 1746.256072][    C2] Modules linked in: sha1_generic xt_policy sctp sch_fq netdevsim ipt_rpfilter act_mirred act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router xt_conntrack act_gact cls_flower sch_ingress nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables bonding psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb [last unloaded: netdevsim]
[ 1746.259521][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1746.259938][ C2] RIP: 0010:__xfrm_route_forward (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/xfrm/xfrm_policy.c:3898) 
[ 1746.260372][ C2] Code: 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 f7 03 00 00 48 8b 43 58 a8 01 0f 85 34 02 00 00 48 a9 fe ff ff ff 74 04 90 <0f> 0b 90 48 8d bb 81 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89
All code
========
   0:	00 fc                	add    %bh,%ah
   2:	ff                   	lcall  (bad)
   3:	df 4c 89 ea          	fisttps -0x16(%rcx,%rcx,4)
   7:	48 c1 ea 03          	shr    $0x3,%rdx
   b:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   f:	0f 85 f7 03 00 00    	jne    0x40c
  15:	48 8b 43 58          	mov    0x58(%rbx),%rax
  19:	a8 01                	test   $0x1,%al
  1b:	0f 85 34 02 00 00    	jne    0x255
  21:	48 a9 fe ff ff ff    	test   $0xfffffffffffffffe,%rax
  27:	74 04                	je     0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 8d bb 81 00 00 00 	lea    0x81(%rbx),%rdi
  34:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  3b:	fc ff df 
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 8d bb 81 00 00 00 	lea    0x81(%rbx),%rdi
   a:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  11:	fc ff df 
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[ 1746.261530][    C2] RSP: 0018:ffffc90000218a00 EFLAGS: 00010282
[ 1746.261965][    C2] RAX: ffff88800b734f40 RBX: ffff8880154f3a80 RCX: 0000000000000001
[ 1746.262476][    C2] RDX: 1ffff11002a9e75b RSI: 0000000000000001 RDI: ffff88800b59a660
[ 1746.262962][    C2] RBP: 1ffff92000043142 R08: 0000000000000001 R09: ffffed10016e69f0
[ 1746.263450][    C2] R10: ffff88800b734f83 R11: ffff88806573a8d8 R12: 0000000000000002
[ 1746.263936][    C2] R13: ffff8880154f3ad8 R14: ffffc90000218a30 R15: ffff88800b59a640
[ 1746.264424][    C2] FS:  00007f5b7204d300(0000) GS:ffff8880c9292000(0000) knlGS:0000000000000000
[ 1746.264996][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1746.265414][    C2] CR2: 00007f5b7229d8b0 CR3: 0000000018f28004 CR4: 0000000000772ef0
[ 1746.265899][    C2] PKRU: 55555554
[ 1746.266152][    C2] Call Trace:
[ 1746.266415][    C2]  <IRQ>
[ 1746.266590][ C2] ? __pfx___xfrm_route_forward (net/xfrm/xfrm_policy.c:3872) 
[ 1746.266947][ C2] ip_forward (./include/net/xfrm.h:1363 ./include/net/xfrm.h:1369 net/ipv4/ip_forward.c:121) 
[ 1746.267292][ C2] ip_rcv (./include/net/dst.h:471 ./include/net/dst.h:469 net/ipv4/ip_input.c:454 ./include/linux/netfilter.h:317 ./include/linux/netfilter.h:311 net/ipv4/ip_input.c:574) 
[ 1746.267556][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 1746.267884][ C2] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 1746.268210][ C2] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 1746.268555][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 1746.268890][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 1746.269210][ C2] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 1746.269544][ C2] __netif_receive_skb_one_core (net/core/dev.c:5979 (discriminator 4)) 
[ 1746.269951][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5972) 
[ 1746.270363][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1746.270685][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 1746.271008][ C2] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 1746.271336][ C2] process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6445) 
[ 1746.271682][ C2] __napi_poll.constprop.0 (net/core/dev.c:7482) 
[ 1746.272016][ C2] net_rx_action (net/core/dev.c:7546 net/core/dev.c:7673) 
[ 1746.272343][ C2] ? __pfx_net_rx_action (net/core/dev.c:7635) 
[ 1746.272685][ C2] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 1746.273008][ C2] ? lock_downgrade (kernel/locking/lockdep.c:468 kernel/locking/lockdep.c:5763) 
[ 1746.273336][ C2] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:95 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 1746.273675][ C2] ? ktime_get (kernel/time/timekeeping.c:251 (discriminator 4) kernel/time/timekeeping.c:360 (discriminator 4) kernel/time/timekeeping.c:778 (discriminator 4)) 
[ 1746.273931][ C2] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) 
[ 1746.274331][ C2] handle_softirqs (kernel/softirq.c:580) 
[ 1746.274671][ C2] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1240) 
[ 1746.275001][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[ 1746.275249][    C2]  </IRQ>
[ 1746.275432][    C2]  <TASK>
[ 1746.275600][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 1746.275929][ C2] __neigh_event_send (net/core/neighbour.c:1241) 
[ 1746.276260][ C2] neigh_resolve_output (net/core/neighbour.c:1545) 
[ 1746.276593][ C2] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:412) 
[ 1746.276916][ C2] ? ___neigh_create (net/core/neighbour.c:693) 
[ 1746.277255][ C2] ip_finish_output2 (./include/net/neighbour.h:547 net/ipv4/ip_output.c:235) 
[ 1746.277594][ C2] ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/ip.h:501 ./include/net/ip.h:515) 
[ 1746.277919][ C2] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 1746.278246][ C2] ? __ip_finish_output (./include/linux/skbuff.h:1685 ./include/linux/skbuff.h:5079 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 1746.278583][ C2] ip_output (./include/linux/netfilter.h:306 net/ipv4/ip_output.c:433) 
[ 1746.278833][ C2] ? __ip_local_out (net/ipv4/ip_output.c:96 net/ipv4/ip_output.c:107) 
[ 1746.279158][ C2] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 1746.279495][ C2] ? __ip_make_skb (net/ipv4/ip_output.c:1382 net/ipv4/ip_output.c:1492) 
[ 1746.279841][ C2] ? __pfx_raw_getfrag (net/ipv4/raw.c:453) 
[ 1746.280160][ C2] ? ip_append_data (net/ipv4/ip_output.c:1371 net/ipv4/ip_output.c:1350) 
[ 1746.280496][ C2] ip_push_pending_frames (./include/net/dst.h:461 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1501 net/ipv4/ip_output.c:1521) 
[ 1746.280841][ C2] raw_sendmsg (net/ipv4/raw.c:658) 
[ 1746.281178][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1746.281520][ C2] ? __pfx_raw_sendmsg (net/ipv4/raw.c:483) 
[ 1746.281849][ C2] ? do_fault_around (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/memory.c:5551) 
[ 1746.282175][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1746.282543][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1746.282887][ C2] ? __might_fault (mm/memory.c:6971 mm/memory.c:6965) 
[ 1746.283219][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1746.283564][ C2] ? __might_fault (mm/memory.c:6971 mm/memory.c:6965) 
[ 1746.283904][ C2] __sys_sendto (net/socket.c:714 net/socket.c:729 net/socket.c:2228) 
[ 1746.284226][ C2] ? __pfx___sys_sendto (net/socket.c:2195) 
[ 1746.284569][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1746.284896][ C2] ? rseq_update_cpu_node_id (kernel/rseq.c:189 (discriminator 10)) 
[ 1746.285222][ C2] ? __rseq_handle_notify_resume (kernel/rseq.c:442) 
[ 1746.285629][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 1746.286032][ C2] __x64_sys_sendto (net/socket.c:2231) 
[ 1746.286369][ C2] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 1746.286704][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 1746.287044][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 1746.287406][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1746.287823][    C2] RIP: 0033:0x7f5b722e428a
[ 1746.288173][ C2] 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
[ 1746.289374][    C2] RSP: 002b:00007ffdd28141b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 1746.289883][    C2] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007f5b722e428a
[ 1746.290397][    C2] RDX: 0000000000000040 RSI: 00000000309f03f0 RDI: 0000000000000005
[ 1746.290909][    C2] RBP: 00007ffdd2814210 R08: 00000000004185e0 R09: 0000000000000010
[ 1746.291420][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054


Finger prints:
__xfrm_route_forward:ip_forward:ip_rcv:__netif_receive_skb_one_core:process_backlog