======================================
|
| [   26.647924][    C0] ------------[ cut here ]------------
| [   26.648292][    C0] kernel BUG at net/core/skbuff.c:2813!
| [   26.648492][    C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   26.648951][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 26.649320][ C0] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 26.649543][ C0] 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)
[   26.650129][    C0] RSP: 0018:ffffc90000007858 EFLAGS: 00010282
[   26.650340][    C0] RAX: 00000000fffffff2 RBX: ffff888005d97774 RCX: 0000000000000004
[   26.650587][    C0] RDX: dffffc0000000000 RSI: 1ffff11000873231 RDI: ffff888004399188
[   26.650855][    C0] RBP: ffffc900000078d8 R08: 0000000000000014 R09: ffff888005d977bc
[   26.651103][    C0] R10: ffff888005d977c0 R11: ffff888005d977c0 R12: ffff888005d97700
[   26.651358][    C0] R13: 0000000000000100 R14: 0000000000000000 R15: 1ffff92000000f37
[   26.651612][    C0] FS:  00007f6affa50740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   26.651904][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.652123][    C0] CR2: 00007f6affbc1160 CR3: 00000000048e8006 CR4: 0000000000770ef0
[   26.652375][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.652621][    C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.652867][    C0] PKRU: 55555554
[   26.652991][    C0] Call Trace:
[   26.653114][    C0]  <IRQ>
[ 26.653201][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 26.653335][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 26.653479][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 26.653646][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 26.653813][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 26.653978][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 26.654143][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 26.654310][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 26.654477][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 26.654648][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 26.654818][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 26.654982][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813) 
[ 26.655153][ C0] tcp_v4_rcv (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:2181) 
[ 26.655323][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 26.655495][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 26.655663][ C0] ? raw_v4_input (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/ipv4/raw.c:189) 
[ 26.655833][ C0] ? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2163) 
[ 26.656001][ C0] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 26.656175][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 26.656338][ C0] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8)) 
[ 26.656511][ C0] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 26.656677][ C0] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 26.656842][ C0] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 26.657008][ C0] ? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2654 net/ipv4/ip_input.c:372) 
[ 26.657213][ C0] 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) 
[ 26.657336][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 26.657498][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 26.657661][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 26.657830][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 26.657995][ C0] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 26.658198][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 26.658404][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 26.658567][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 26.658733][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 26.658916][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 26.659083][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 26.659253][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 26.659420][ C0] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 26.659592][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 26.659760][ C0] __do_softirq (kernel/softirq.c:553) 
[ 26.659930][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 26.660098][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   26.660227][    C0]  </IRQ>
[   26.660312][    C0]  <TASK>
[ 26.660395][ C0] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 26.660564][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 26.660730][ C0] __dev_queue_xmit (net/core/dev.c:4400) 
[ 26.660900][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 26.661067][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 26.661277][ C0] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) 
[ 26.661444][ C0] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:772 ./include/net/neighbour.h:496) 
[ 26.661623][ C0] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 26.661786][ C0] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 26.661963][ C0] ? __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) 
[ 26.662131][ C0] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 26.662258][ C0] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 26.662424][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 26.662590][ C0] ? ip_local_out (./include/linux/skbuff.h:1136 ./include/net/dst.h:450 net/ipv4/ip_output.c:129) 
[ 26.662755][ C0] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) 
[ 26.662924][ C0] ? __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)) 
[ 26.663093][ C0] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 26.663266][ C0] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) 
[ 26.663437][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 26.663604][ C0] ? tcp_write_xmit (net/ipv4/tcp_output.c:57 net/ipv4/tcp_output.c:2713) 
[ 26.663770][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 26.663938][ C0] ? 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) 
[ 26.664149][ C0] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 26.664317][ C0] ? __pfx_tcp_write_xmit (net/ipv4/tcp_output.c:2702) 
[ 26.664483][ C0] ? __pfx_tcp_set_state (net/ipv4/tcp.c:2595) 
[ 26.664654][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4346) 
[ 26.664861][ C0] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 26.665028][ C0] __tcp_close (net/ipv4/tcp.c:2842) 
[ 26.665194][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 26.665399][ C0] tcp_close (net/ipv4/tcp.c:2932) 
[ 26.665524][ C0] inet_release (net/ipv4/af_inet.c:436) 
[ 26.665691][ C0] __sock_release (net/socket.c:659) 
[ 26.665861][ C0] sock_close (net/socket.c:1423) 
[ 26.665986][ C0] __fput (fs/file_table.c:376) 
[ 26.666125][ C0] __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) 
[ 26.666292][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 26.666455][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   26.666660][    C0] RIP: 0033:0x7f6affb92007
[ 26.666846][ C0] 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
[   26.667432][    C0] RSP: 002b:00007ffefa4f5068 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   26.667685][    C0] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007f6affb92007
[   26.667933][    C0] RDX: 0000000000000012 RSI: 0000000000000002 RDI: 0000000000000011
[   26.668186][    C0] RBP: 0000000000000011 R08: 0000000000000000 R09: 0000000000000000
[   26.668432][    C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
__pskb_pull_tail:tcp_v4_rcv:ip_protocol_deliver_rcu:ip_local_deliver_finish