======================================
|
| [   33.406715][    C1] ------------[ cut here ]------------
| [   33.407070][    C1] kernel BUG at net/core/skbuff.c:2813!
| [   33.407436][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   33.407856][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 33.408188][ C1] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 33.408394][ C1] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 8e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9
All code
========
   0:	e9 52 f7 ff ff       	jmp    0xfffffffffffff757
   5:	48 8b 7c 24 38       	mov    0x38(%rsp),%rdi
   a:	be 02 00 00 00       	mov    $0x2,%esi
   f:	e8 8e 9c ff ff       	call   0xffffffffffff9ca2
  14:	48 83 c4 58          	add    $0x58,%rsp
  18:	31 c0                	xor    %eax,%eax
  1a:	5b                   	pop    %rbx
  1b:	41 5c                	pop    %r12
  1d:	41 5d                	pop    %r13
  1f:	41 5e                	pop    %r14
  21:	41 5f                	pop    %r15
  23:	5d                   	pop    %rbp
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
  33:	00 00 
  35:	e9 dc fa ff ff       	jmp    0xfffffffffffffb16
  3a:	84 c9                	test   %cl,%cl
  3c:	0f                   	.byte 0xf
  3d:	84 4b f9             	test   %cl,-0x7(%rbx)

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
   9:	00 00 
   b:	e9 dc fa ff ff       	jmp    0xfffffffffffffaec
  10:	84 c9                	test   %cl,%cl
  12:	0f                   	.byte 0xf
  13:	84 4b f9             	test   %cl,-0x7(%rbx)
[   33.408917][    C1] RSP: 0018:ffffc900001c8858 EFLAGS: 00010282
[   33.409105][    C1] RAX: 00000000fffffff2 RBX: ffff8880060353f4 RCX: 0000000000000004
[   33.409330][    C1] RDX: dffffc0000000000 RSI: 1ffff11000857ea9 RDI: ffff8880042bf548
[   33.409553][    C1] RBP: ffffc900001c88d8 R08: 0000000000000014 R09: ffff88800603543c
[   33.409773][    C1] R10: ffff888006035440 R11: ffff888006035440 R12: ffff888006035380
[   33.409999][    C1] R13: 0000000000000100 R14: 0000000000000000 R15: 1ffff92000039137
[   33.410222][    C1] FS:  00007f0c14092740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   33.410516][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.410704][    C1] CR2: 0000000000402089 CR3: 0000000003612005 CR4: 0000000000770ef0
[   33.410925][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.411147][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.411403][    C1] PKRU: 55555554
[   33.411514][    C1] Call Trace:
[   33.411626][    C1]  <IRQ>
[ 33.411705][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 33.411821][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 33.411937][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 33.412098][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 33.412249][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 33.412400][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 33.412548][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 33.412695][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 33.412842][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 33.412990][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 33.413142][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 33.413296][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813) 
[ 33.413448][ C1] tcp_v4_rcv (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:2181) 
[ 33.413598][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 33.413748][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 33.413900][ C1] ? raw_v4_input (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/ipv4/raw.c:189) 
[ 33.414050][ C1] ? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2163) 
[ 33.414201][ C1] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 33.414360][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 33.414516][ C1] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.414701][ C1] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8)) 
[ 33.414850][ C1] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 33.415000][ C1] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 33.415148][ C1] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 33.415299][ C1] ? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2654 net/ipv4/ip_input.c:372) 
[ 33.415485][ C1] ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 33.415597][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 33.415749][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 33.415898][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 33.416049][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 33.416197][ C1] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 33.416386][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 33.416587][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 33.416738][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 33.416887][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 33.417038][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 33.417154][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 33.417309][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 33.417460][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 33.417607][ C1] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 33.417758][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 33.417908][ C1] __do_softirq (kernel/softirq.c:553) 
[ 33.418061][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 33.418209][ C1] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   33.418329][    C1]  </IRQ>
[   33.418407][    C1]  <TASK>
[ 33.418487][ C1] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 33.418633][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 33.418782][ C1] __dev_queue_xmit (net/core/dev.c:4400) 
[ 33.418936][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 33.419084][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 33.419277][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) 
[ 33.419429][ C1] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:772 ./include/net/neighbour.h:496) 
[ 33.419582][ C1] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 33.419734][ C1] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 33.419884][ C1] ? __ip_finish_output (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 33.420031][ C1] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 33.420147][ C1] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 33.420300][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 33.420449][ C1] ? ip_local_out (./include/linux/skbuff.h:1136 ./include/net/dst.h:450 net/ipv4/ip_output.c:129) 
[ 33.420603][ C1] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) 
[ 33.420752][ 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:1605 (discriminator 4)) 
[ 33.420901][ C1] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 33.421054][ C1] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) 
[ 33.421201][ C1] ? tcp_call_bpf (./include/net/sock.h:1698 ./include/net/sock.h:1793 ./include/net/tcp.h:2632) 
[ 33.421359][ C1] tcp_connect (net/ipv4/tcp_output.c:1480 net/ipv4/tcp_output.c:4100) 
[ 33.421509][ C1] tcp_v4_connect (net/ipv4/tcp_ipv4.c:324) 
[ 33.421659][ C1] ? __pfx_tcp_v4_connect (net/ipv4/tcp_ipv4.c:202) 
[ 33.421807][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 33.421919][ C1] __inet_stream_connect (net/ipv4/af_inet.c:678) 
[ 33.422145][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 33.422482][ C1] inet_stream_connect (net/ipv4/af_inet.c:750) 
[ 33.422730][ C1] __sys_connect (net/socket.c:2048 net/socket.c:2065) 
[ 33.422982][ C1] ? __pfx___sys_connect (net/socket.c:2055) 
[ 33.423235][ C1] ? __pfx___sys_setsockopt (net/socket.c:2324) 
[ 33.423488][ C1] ? __sys_socket (net/socket.c:497 net/socket.c:1715) 
[ 33.423739][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 33.423947][ C1] ? __pfx___sys_socket (net/socket.c:1702) 
[ 33.424110][ C1] __x64_sys_connect (net/socket.c:2072) 
[ 33.424270][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.424430][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   33.424630][    C1] RIP: 0033:0x7f0c141e43d7
[ 33.424800][ C1] Code: 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb bc 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 18 89 54 24 0c 48 89 34 24 89
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
   c:	eb bc                	jmp    0xffffffffffffffca
   e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  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 2a 00 00 00       	mov    $0x2a,%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 18          	sub    $0x18,%rsp
  37:	89 54 24 0c          	mov    %edx,0xc(%rsp)
  3b:	48 89 34 24          	mov    %rsi,(%rsp)
  3f:	89                   	.byte 0x89

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 18          	sub    $0x18,%rsp
   d:	89 54 24 0c          	mov    %edx,0xc(%rsp)
  11:	48 89 34 24          	mov    %rsi,(%rsp)
  15:	89                   	.byte 0x89
[   33.425349][    C1] RSP: 002b:00007ffe9649e778 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[   33.425574][    C1] RAX: ffffffffffffffda RBX: 00000000000018ea RCX: 00007f0c141e43d7
[   33.425800][    C1] RDX: 0000000000000010 RSI: 00007ffe9649e7c0 RDI: 0000000000000006
[   33.426037][    C1] RBP: 0000000000000006 R08: 0000000000000001 R09: 0000000000000004
[   33.426276][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c140926c0


Finger prints:
__pskb_pull_tail:tcp_v4_rcv:ip_protocol_deliver_rcu:ip_local_deliver_finish