======================================
|
| [   57.410626][    C1] ------------[ cut here ]------------
| [   57.411068][    C1] kernel BUG at net/core/skbuff.c:2813!
| [   57.411268][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   57.411739][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 57.412096][ C1] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 57.412317][ 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)
[   57.412901][    C1] RSP: 0018:ffffc900001c8ac0 EFLAGS: 00010282
[   57.413110][    C1] RAX: 00000000fffffff2 RBX: ffff88800745c974 RCX: 0000000000000004
[   57.413364][    C1] RDX: dffffc0000000000 RSI: 1ffff11000cb29c9 RDI: ffff888006594e48
[   57.413604][    C1] RBP: ffffc900001c8b40 R08: 0000000000000014 R09: ffff88800745c9bc
[   57.413842][    C1] R10: ffff88800745c9c0 R11: ffff88800745c9c0 R12: ffff88800745c900
[   57.414077][    C1] R13: 0000000000000100 R14: 0000000000000000 R15: ffff88800745c9b2
[   57.414314][    C1] FS:  00007f8b27899740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   57.414593][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   57.414791][    C1] CR2: 00007f8b27a5c630 CR3: 0000000004370002 CR4: 0000000000770ef0
[   57.415029][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   57.415260][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   57.415491][    C1] PKRU: 55555554
[   57.415617][    C1] Call Trace:
[   57.415737][    C1]  <IRQ>
[ 57.415818][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 57.415941][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 57.416061][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 57.416217][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 57.416377][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 57.416533][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 57.416689][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 57.416851][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 57.417006][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 57.417167][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 57.417330][ C1] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 57.417487][ C1] ? 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) 
[ 57.417652][ C1] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) 
[ 57.417820][ C1] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:2943 ./include/linux/ip.h:21 net/ipv4/ip_input.c:344) 
[ 57.418020][ C1] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 57.418145][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 57.418307][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 57.418469][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 57.418628][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 57.418786][ C1] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 57.418984][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 57.419185][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 57.419342][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 57.419498][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 57.419663][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 57.419822][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 57.419981][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 57.420140][ C1] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 57.420302][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 57.420464][ C1] __do_softirq (kernel/softirq.c:553) 
[ 57.420625][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 57.420783][ C1] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   57.420911][    C1]  </IRQ>
[   57.420996][    C1]  <TASK>
[ 57.421078][ C1] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 57.421235][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 57.421392][ C1] __dev_queue_xmit (net/core/dev.c:4400) 
[ 57.421548][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 57.421715][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 57.421921][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) 
[ 57.422085][ C1] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[ 57.422246][ C1] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 57.422404][ 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) 
[ 57.422565][ C1] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) 
[ 57.422723][ 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)) 
[ 57.422882][ C1] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[ 57.423043][ C1] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) 
[ 57.423205][ C1] ? 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) 
[ 57.423403][ C1] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[ 57.423559][ C1] ? __pfx_tcp_current_mss (net/ipv4/tcp_output.c:1853) 
[ 57.423716][ C1] ? __pfx_tcp_write_xmit (net/ipv4/tcp_output.c:2702) 
[ 57.423872][ C1] ? tcp_get_info (net/ipv4/tcp.c:3770) 
[ 57.424029][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 57.424184][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 57.424341][ C1] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[ 57.424498][ C1] __tcp_close (net/ipv4/tcp.c:2842) 
[ 57.424659][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 57.424852][ C1] __mptcp_close_ssk (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:327 ./include/linux/refcount.h:348 ./include/net/sock.h:782 net/mptcp/protocol.c:2467) 
[ 57.425013][ C1] ? __pfx___mptcp_close_ssk (net/mptcp/protocol.c:2411) 
[ 57.425170][ C1] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:153 kernel/time/timer.c:1334) 
[ 57.425327][ C1] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:153 kernel/time/timer.c:1334) 
[ 57.425484][ C1] mptcp_destroy_common (net/mptcp/protocol.c:3353) 
[ 57.425640][ C1] mptcp_destroy (./include/net/sock.h:1480 (discriminator 3) net/mptcp/protocol.c:3380 (discriminator 3)) 
[ 57.425798][ C1] __mptcp_destroy_sock (net/mptcp/protocol.c:2999) 
[ 57.425959][ C1] __mptcp_close (net/mptcp/protocol.c:3104) 
[ 57.426123][ C1] ? __pfx___mptcp_close (net/mptcp/protocol.c:3042) 
[ 57.426279][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 57.426476][ C1] mptcp_close (net/mptcp/protocol.c:3119) 
[ 57.426595][ C1] inet_release (net/ipv4/af_inet.c:436) 
[ 57.426757][ C1] __sock_release (net/socket.c:659) 
[ 57.426916][ C1] sock_close (net/socket.c:1423) 
[ 57.427032][ C1] __fput (fs/file_table.c:376) 
[ 57.427162][ C1] __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) 
[ 57.427321][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 57.427480][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   57.427677][    C1] RIP: 0033:0x7f8b279db007
[ 57.427843][ C1] 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
[   57.428393][    C1] RSP: 002b:00007fff8efbcb08 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   57.428640][    C1] RAX: ffffffffffffffda RBX: 0000000000fa72a0 RCX: 00007f8b279db007
[   57.428882][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
[   57.429119][    C1] RBP: 0000000000000005 R08: 00007f8b27a95228 R09: 00007f8b27a95260
[   57.429358][    C1] R10: 00007f8b278a9ef8 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
__pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core