======================================
|
| xx__-> [ 1928.454611][    C1] ------------[ cut here ]------------
| [ 1928.455154][ C1] WARNING: CPU: 1 PID: 16441 at net/core/skbuff.c:1178 sk_skb_reason_drop (net/core/skbuff.c:1178 net/core/skbuff.c:1203) 
| [ 1928.455748][    C1] Modules linked in: ip6t_rpfilter xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router xt_conntrack act_gact nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 unix_diag geneve vxlan ip6_gre ip_gre gre cls_flower sch_prio xt_mark nft_compat nf_tables sch_ingress act_mirred cls_basic sch_fq_codel [last unloaded: psample]
[ 1928.458734][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1928.459148][ C1] RIP: 0010:sk_skb_reason_drop (net/core/skbuff.c:1178 net/core/skbuff.c:1203) 
[ 1928.459506][ C1] Code: 85 c0 0f 8e 99 00 00 00 5d 41 5c 41 5d 41 5e c3 cc cc cc cc 45 85 e4 74 10 44 89 e0 25 00 00 ff ff 48 3d 00 00 02 00 76 04 90 <0f> 0b 90 41 83 fc 01 74 5f 48 8b 74 24 20 4c 89 e9 44 89 e2 48 89
All code
========
   0:	85 c0                	test   %eax,%eax
   2:	0f 8e 99 00 00 00    	jle    0xa1
   8:	5d                   	pop    %rbp
   9:	41 5c                	pop    %r12
   b:	41 5d                	pop    %r13
   d:	41 5e                	pop    %r14
   f:	c3                   	ret
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	cc                   	int3
  14:	45 85 e4             	test   %r12d,%r12d
  17:	74 10                	je     0x29
  19:	44 89 e0             	mov    %r12d,%eax
  1c:	25 00 00 ff ff       	and    $0xffff0000,%eax
  21:	48 3d 00 00 02 00    	cmp    $0x20000,%rax
  27:	76 04                	jbe    0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	41 83 fc 01          	cmp    $0x1,%r12d
  31:	74 5f                	je     0x92
  33:	48 8b 74 24 20       	mov    0x20(%rsp),%rsi
  38:	4c 89 e9             	mov    %r13,%rcx
  3b:	44 89 e2             	mov    %r12d,%edx
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	41 83 fc 01          	cmp    $0x1,%r12d
   7:	74 5f                	je     0x68
   9:	48 8b 74 24 20       	mov    0x20(%rsp),%rsi
   e:	4c 89 e9             	mov    %r13,%rcx
  11:	44 89 e2             	mov    %r12d,%edx
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[ 1928.460689][    C1] RSP: 0018:ffffc900001c0878 EFLAGS: 00010206
[ 1928.461096][    C1] RAX: 000000000ebb0000 RBX: 1ffff92000038115 RCX: ffffffff9bc000b6
[ 1928.461583][    C1] RDX: ffffed1001d771ac RSI: 0000000000000004 RDI: ffff88800ebb8d5c
[ 1928.462068][    C1] RBP: ffff88800ebb8c80 R08: 0000000000000001 R09: ffffed1001d771ab
[ 1928.462552][    C1] R10: ffff88800ebb8d5f R11: ffffffff9dd88620 R12: 000000000ebb8c80
[ 1928.463032][    C1] R13: ffff88800d5a8740 R14: ffff88800ebb8d5c R15: 000000000000000e
[ 1928.463762][    C1] FS:  00007fe2a0e45300(0000) GS:ffff8880cd642000(0000) knlGS:0000000000000000
[ 1928.464329][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1928.464743][    C1] CR2: 00007fe2a10d48c0 CR3: 000000000af22004 CR4: 0000000000772ef0
[ 1928.465225][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1928.465732][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1928.466226][    C1] PKRU: 55555554
[ 1928.466475][    C1] Call Trace:
[ 1928.466735][    C1]  <IRQ>
[ 1928.466917][ C1] raw_rcv (net/ipv4/raw.c:305 net/ipv4/raw.c:322 net/ipv4/raw.c:311) 
[ 1928.467165][ C1] ? __pfx_raw_rcv (net/ipv4/raw.c:312) 
[ 1928.467519][ C1] ? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1567 (discriminator 4)) 
[ 1928.467849][ C1] raw_v4_input (net/ipv4/raw.c:193) 
[ 1928.468183][ C1] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 1928.468518][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 1928.468851][ C1] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:193) 
[ 1928.469192][ C1] ip_local_deliver_finish (./include/linux/rcupdate.h:869 net/ipv4/ip_input.c:234) 
[ 1928.469564][ C1] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 1928.469892][ C1] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 1928.470222][ C1] ? ip_rcv_finish_core (./include/linux/skbuff.h:1166 ./include/net/route.h:88 net/ipv4/ip_input.c:390) 
[ 1928.470574][ C1] ip_rcv (./include/net/dst.h:469 net/ipv4/ip_input.c:447 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:567) 
[ 1928.470817][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:560) 
[ 1928.471134][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 1928.471458][ C1] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 1928.471790][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 1928.472110][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:560) 
[ 1928.472425][ C1] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6443) 
[ 1928.472752][ C1] __netif_receive_skb_one_core (net/core/dev.c:5980 (discriminator 4)) 
[ 1928.473146][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5973) 
[ 1928.473549][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 1928.473866][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 1928.474209][ C1] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6443) 
[ 1928.474545][ C1] process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6446) 
[ 1928.474872][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 1928.475199][ C1] __napi_poll.constprop.0 (net/core/dev.c:7417) 
[ 1928.476041][ C1] net_rx_action (net/core/dev.c:7481 net/core/dev.c:7603) 
[ 1928.476371][ C1] ? __pfx_net_rx_action (net/core/dev.c:7565) 
[ 1928.476702][ C1] ? 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) 
[ 1928.477026][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 1928.477353][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 1928.477904][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:908 net/core/dev.c:4740) 
[ 1928.478223][ C1] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[ 1928.478462][    C1]  </IRQ>
[ 1928.478633][    C1]  <TASK>
[ 1928.478794][ C1] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 1928.479111][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:908 net/core/dev.c:4740) 
[ 1928.479455][ C1] __dev_queue_xmit (net/core/dev.c:4741) 
[ 1928.479793][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 1928.480127][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4621) 
[ 1928.480458][ C1] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 ./include/net/neighbour.h:493) 
[ 1928.480793][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 1928.481111][ C1] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 ./include/net/neighbour.h:493) 
[ 1928.481680][ C1] ip_finish_output2 (./include/net/neighbour.h:537 net/ipv4/ip_output.c:235) 
[ 1928.482000][ C1] ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/ip.h:499 ./include/net/ip.h:512) 
[ 1928.482323][ C1] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 1928.482665][ C1] ? __ip_finish_output (./include/linux/skbuff.h:1687 ./include/linux/skbuff.h:5078 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 1928.482989][ C1] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 1928.483228][ C1] ? __ip_local_out (net/ipv4/ip_output.c:96 net/ipv4/ip_output.c:107) 
[ 1928.483556][ C1] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 1928.483871][ C1] ? __ip_make_skb (net/ipv4/ip_output.c:1383 net/ipv4/ip_output.c:1493) 
[ 1928.484194][ C1] ? __pfx_raw_getfrag (net/ipv4/raw.c:453) 
[ 1928.484518][ C1] ? ip_append_data (net/ipv4/ip_output.c:1372 net/ipv4/ip_output.c:1351) 
[ 1928.484843][ C1] ip_push_pending_frames (./include/net/dst.h:459 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1502 net/ipv4/ip_output.c:1522) 
[ 1928.485163][ C1] raw_sendmsg (net/ipv4/raw.c:658) 
[ 1928.485486][ C1] ? __pfx_raw_sendmsg (net/ipv4/raw.c:483) 
[ 1928.485836][ C1] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 1928.486152][ C1] ? __might_fault (mm/memory.c:7151 mm/memory.c:7145) 
[ 1928.486469][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 1928.487237][ C1] ? __might_fault (mm/memory.c:7151 mm/memory.c:7145) 
[ 1928.487569][ C1] __sys_sendto (net/socket.c:712 net/socket.c:727 net/socket.c:2180) 
[ 1928.487894][ C1] ? __pfx___sys_sendto (net/socket.c:2147) 
[ 1928.488218][ C1] ? __pfx_do_sock_setsockopt (net/socket.c:2265) 
[ 1928.488550][ C1] ? __sys_recvmsg (net/socket.c:2861) 
[ 1928.488871][ C1] ? __pfx___sys_recvmsg (net/socket.c:2846) 
[ 1928.489193][ C1] ? ksys_write (fs/read_write.c:736) 
[ 1928.489569][ C1] ? __pfx_ksys_write (fs/read_write.c:726) 
[ 1928.489904][ C1] __x64_sys_sendto (net/socket.c:2183) 
[ 1928.490233][ C1] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:198 arch/x86/entry/syscall_64.c:90) 
[ 1928.490577][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 1928.490894][ C1] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 1928.491213][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1928.491613][    C1] RIP: 0033:0x7fe2a111ba4a
[ 1928.491944][ 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
[ 1928.493088][    C1] RSP: 002b:00007ffdf1378dd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 1928.493605][    C1] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fe2a111ba4a
[ 1928.494349][    C1] RDX: 0000000000000040 RSI: 00000000097313f0 RDI: 0000000000000005
[ 1928.494834][    C1] RBP: 00007ffdf1378e30 R08: 00000000004185e0 R09: 0000000000000010
[ 1928.495317][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054


Finger prints:
sk_skb_reason_drop:raw_rcv:raw_v4_input:ip_protocol_deliver_rcu:ip_local_deliver_finish