======================================
|
| [  126.710382][    C2] ------------[ cut here ]------------
| [  126.710900][    C2] kernel BUG at net/core/skbuff.c:2813!
| [  126.711128][    C2] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[  126.711591][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 126.711936][ C2] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 126.712144][ C2] 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)
[  126.712679][    C2] RSP: 0018:ffffc90000220ac0 EFLAGS: 00010282
[  126.712882][    C2] RAX: 00000000fffffff2 RBX: ffff888005849e74 RCX: 0000000000000004
[  126.713111][    C2] RDX: dffffc0000000000 RSI: 1ffff11000bcad71 RDI: ffff888005e56b88
[  126.713340][    C2] RBP: ffffc90000220b40 R08: 0000000000000014 R09: ffff888005849ebc
[  126.713589][    C2] R10: ffff888005849ec0 R11: ffff888005849ec0 R12: ffff888005849e00
[  126.713834][    C2] R13: 0000000000000100 R14: 0000000000000000 R15: ffff888005849eb2
[  126.714071][    C2] FS:  00007f0a87c9f740(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[  126.714338][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  126.714537][    C2] CR2: 00007ffc38586000 CR3: 000000000f328003 CR4: 0000000000770ef0
[  126.714773][    C2] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  126.715027][    C2] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  126.715274][    C2] PKRU: 55555554
[  126.715390][    C2] Call Trace:
[  126.715512][    C2]  <IRQ>
[ 126.715596][ C2] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 126.715721][ C2] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 126.715844][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 126.716006][ C2] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 126.716164][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 126.716324][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 126.716478][ C2] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 126.716638][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 126.716800][ C2] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 126.716964][ C2] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 126.717124][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 126.717285][ C2] ? 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:228) 
[ 126.717446][ C2] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) 
[ 126.717616][ C2] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:2943 ./include/linux/ip.h:21 net/ipv4/ip_input.c:344) 
[ 126.717823][ C2] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 126.717946][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 126.718103][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 126.718255][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 126.718418][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 126.718574][ C2] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 126.718769][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 126.718970][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 126.719130][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 126.719282][ C2] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 126.719438][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 126.719592][ C2] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 126.719751][ C2] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 126.719909][ C2] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 126.720068][ C2] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 126.720223][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 126.720379][ C2] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) 
[ 126.720530][ C2] __do_softirq (kernel/softirq.c:553) 
[ 126.720692][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 126.720844][ C2] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[  126.720968][    C2]  </IRQ>
[  126.721049][    C2]  <TASK>
[ 126.721128][ C2] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 126.721284][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 126.721446][ C2] __dev_queue_xmit (net/core/dev.c:4400) 
[ 126.721597][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 126.721758][ C2] ? eth_header (net/ethernet/eth.c:100) 
[ 126.721911][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) 
[ 126.722072][ C2] ? neigh_resolve_output (./include/linux/netdevice.h:3226 net/core/neighbour.c:1558 net/core/neighbour.c:1543) 
[ 126.722235][ C2] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[ 126.722395][ C2] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 126.722552][ C2] ? __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) 
[ 126.722704][ C2] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 126.722825][ C2] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 126.722977][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 126.723136][ C2] ? ip_local_out (./include/linux/skbuff.h:1136 ./include/net/dst.h:450 net/ipv4/ip_output.c:129) 
[ 126.723297][ C2] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) 
[ 126.723448][ C2] ? __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)) 
[ 126.723608][ C2] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 126.723772][ C2] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) 
[ 126.723928][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 126.724082][ C2] ? tcp_write_xmit (net/ipv4/tcp_output.c:57 net/ipv4/tcp_output.c:2713) 
[ 126.724237][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 126.724403][ C2] ? tcp_small_queue_check.isra.0 (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/ipv4/tcp_output.c:2623) 
[ 126.724600][ C2] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 126.724766][ C2] ? __pfx_tcp_write_xmit (net/ipv4/tcp_output.c:2702) 
[ 126.724919][ C2] ? __pfx_tcp_set_state (net/ipv4/tcp.c:2595) 
[ 126.725080][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 126.725234][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 126.725391][ C2] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 126.725549][ C2] __tcp_close (net/ipv4/tcp.c:2842) 
[ 126.725709][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 126.725908][ C2] tcp_close (net/ipv4/tcp.c:2932) 
[ 126.726024][ C2] inet_release (net/ipv4/af_inet.c:436) 
[ 126.726180][ C2] __sock_release (net/socket.c:659) 
[ 126.726334][ C2] sock_close (net/socket.c:1423) 
[ 126.726451][ C2] __fput (fs/file_table.c:376) 
[ 126.726577][ C2] __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) 
[ 126.726732][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 126.726886][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  126.727084][    C2] RIP: 0033:0x7f0a87de1007
[ 126.727243][ C2] Code: ff e8 fd e2 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 cb f5 ff
All code
========
   0:	ff                   	(bad)
   1:	e8 fd e2 01 00       	call   0x1e303
   6:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 
  10:	0f 1f 00             	nopl   (%rax)
  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 03 00 00 00       	mov    $0x3,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 41                	ja     0x73
  32:	c3                   	ret
  33:	48 83 ec 18          	sub    $0x18,%rsp
  37:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  3b:	e8 c3 cb f5 ff       	call   0xfffffffffff5cc03

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 41                	ja     0x49
   8:	c3                   	ret
   9:	48 83 ec 18          	sub    $0x18,%rsp
   d:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  11:	e8 c3 cb f5 ff       	call   0xfffffffffff5cbd9
[  126.727802][    C2] RSP: 002b:00007ffc3855fc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  126.728036][    C2] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f0a87de1007
[  126.728273][    C2] RDX: 0000000000000014 RSI: 0000018e11547b1c RDI: 0000000000000006
[  126.728509][    C2] RBP: 0000000000000006 R08: 00007ffc38585080 R09: 00007ffc3855fd10
[  126.728741][    C2] R10: 7fffffffffffffff R11: 0000000000000246 R12: 00007ffc3855fd10


Finger prints:
__pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core