======================================
| [   14.500209][  T263] netdevsim netdevsim529 eni529np1: renamed from eth1
| [   17.515295][    C0] ------------[ cut here ]------------
| [   17.516061][    C0] WARNING: CPU: 0 PID: 293 at ./include/net/sch_generic.h:843 __dev_xmit_skb (./include/net/sch_generic.h:843 ./include/net/sch_generic.h:889 ./include/net/sch_generic.h:895 net/core/dev.c:4168)
| [   17.516847][    C0] Modules linked in: netdevsim psample
[   17.518078][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.518648][    C0] RIP: 0010:__dev_xmit_skb (./include/net/sch_generic.h:843 ./include/net/sch_generic.h:889 ./include/net/sch_generic.h:895 net/core/dev.c:4168)
[   17.519079][    C0] Code: ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 09 84 c0 74 05 e8 1c c6 e8 fe 41 c6 87 b0 01 00 00 00 45 31 ed e9 06 f6 ff ff 90 <0f> 0b 90 e9 00 ff ff ff be 08 00 00 00 48 89 ef e8 56 cc e8 fe f0
All code
========
   0:	ea                   	(bad)
   1:	03 0f                	add    (%rdi),%ecx
   3:	b6 04                	mov    $0x4,%dh
   5:	02 48 89             	add    -0x77(%rax),%cl
   8:	fa                   	cli
   9:	83 e2 07             	and    $0x7,%edx
   c:	38 d0                	cmp    %dl,%al
   e:	7f 09                	jg     0x19
  10:	84 c0                	test   %al,%al
  12:	74 05                	je     0x19
  14:	e8 1c c6 e8 fe       	call   0xfffffffffee8c635
  19:	41 c6 87 b0 01 00 00 	movb   $0x0,0x1b0(%r15)
  20:	00 
  21:	45 31 ed             	xor    %r13d,%r13d
  24:	e9 06 f6 ff ff       	jmp    0xfffffffffffff62f
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 00 ff ff ff       	jmp    0xffffffffffffff32
  32:	be 08 00 00 00       	mov    $0x8,%esi
  37:	48 89 ef             	mov    %rbp,%rdi
  3a:	e8 56 cc e8 fe       	call   0xfffffffffee8cc95
  3f:	f0                   	lock

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 00 ff ff ff       	jmp    0xffffffffffffff08
   8:	be 08 00 00 00       	mov    $0x8,%esi
   d:	48 89 ef             	mov    %rbp,%rdi
  10:	e8 56 cc e8 fe       	call   0xfffffffffee8cc6b
  15:	f0                   	lock
[   17.520697][    C0] RSP: 0018:ffffc900000076a0 EFLAGS: 00010202
[   17.521304][    C0] RAX: 0000000000000001 RBX: ffffe8ffffc09170 RCX: 0000000000000000
[   17.522100][    C0] RDX: 0000000000000007 RSI: ffffffffb6c602c0 RDI: ffff888012b06f06
[   17.522764][    C0] RBP: ffff88800ece5198 R08: 0000000000000001 R09: 0000000000000001
[   17.523424][    C0] R10: 000000000000a000 R11: ffff88800ece5228 R12: ffff88800ac9c128
[   17.524244][    C0] R13: ffff888012b06f00 R14: ffff88800ece5210 R15: ffff88800ece5000
[   17.524896][    C0] FS:  00007fafe6cf5b80(0000) GS:ffff8880ad908000(0000) knlGS:0000000000000000
[   17.525659][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   17.526186][    C0] CR2: 00007fafe6e26b90 CR3: 0000000008d7a003 CR4: 0000000000772ef0
[   17.526959][    C0] PKRU: 55555554
[   17.527313][    C0] Call Trace:
[   17.527636][    C0]  <IRQ>
[   17.527891][    C0]  ? napi_hash_add (net/core/dev.c:4073)
[   17.528399][    C0]  ? dev_get_stats (net/core/dev.c:4143)
[   17.528848][    C0]  __dev_queue_xmit (net/core/dev.c:4786)
[   17.529278][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   17.529680][    C0]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   17.530119][    C0]  ? eth_header (net/ethernet/eth.c:100)
[   17.530519][    C0]  ? neigh_resolve_output (./include/linux/netdevice.h:3422 net/core/neighbour.c:1589 net/core/neighbour.c:1574)
[   17.530987][    C0]  ? __neigh_update (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:867 net/core/neighbour.c:1476)
[   17.531408][    C0]  __neigh_update (./include/linux/instrumented.h:96 (discriminator 2) ./include/linux/atomic/atomic-instrumented.h:400 (discriminator 2) ./include/linux/refcount.h:389 (discriminator 2) ./include/linux/refcount.h:432 (discriminator 2) ./include/linux/refcount.h:450 (discriminator 2) ./include/net/neighbour.h:458 (discriminator 2) net/core/neighbour.c:1494 (discriminator 2))
[   17.531959][    C0]  arp_process (./include/linux/instrumented.h:96 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:400 (discriminator 4) ./include/linux/refcount.h:389 (discriminator 4) ./include/linux/refcount.h:432 (discriminator 4) ./include/linux/refcount.h:450 (discriminator 4) ./include/net/neighbour.h:458 (discriminator 4) net/ipv4/arp.c:937 (discriminator 4))
[   17.532409][    C0]  ? arp_send (net/ipv4/arp.c:702)
[   17.532727][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   17.533103][    C0]  ? arp_rcv.part.0 (net/ipv4/arp.c:968)
[   17.533567][    C0]  __netif_receive_skb_one_core (net/core/dev.c:6131)
[   17.534086][    C0]  ? __netif_receive_skb_list_core (net/core/dev.c:6131)
[   17.534630][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   17.535094][    C0]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   17.535495][    C0]  ? netif_receive_skb_internal (./include/linux/rcupdate.h:331 (discriminator 16) ./include/linux/rcupdate.h:867 (discriminator 16) net/core/dev.c:6324 (discriminator 16))
[   17.536016][    C0]  netif_receive_skb_internal (net/core/dev.c:6337)
[   17.536404][    C0]  ? __netif_receive_skb (net/core/dev.c:6316)
[   17.536852][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   17.537270][    C0]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194)
[   17.537809][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   17.538263][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   17.538672][    C0]  netif_receive_skb (net/core/dev.c:6396)
[   17.539132][    C0] nsim_poll (drivers/net/netdevsim/netdev.c:439 drivers/net/netdevsim/netdev.c:454) netdevsim
[   17.539594][    C0]  ? nsim_start_peer_tx_queue.isra.0 (drivers/net/netdevsim/netdev.c:450) netdevsim
[   17.540260][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   17.540737][    C0]  __napi_poll.constprop.0 (net/core/dev.c:7668)
[   17.541158][    C0]  net_rx_action (net/core/dev.c:7730 net/core/dev.c:7882)
[   17.541561][    C0]  ? run_backlog_napi (net/core/dev.c:7844)
[   17.541966][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:326)
[   17.542330][    C0]  ? lock_downgrade (kernel/locking/lockdep.c:471 kernel/locking/lockdep.c:5764)
[   17.542699][    C0]  ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:95 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86)
[   17.543125][    C0]  ? ktime_get (kernel/time/timekeeping.c:387 (discriminator 4) kernel/time/timekeeping.c:404 (discriminator 4) kernel/time/timekeeping.c:826 (discriminator 4))
[   17.543411][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:336 (discriminator 3))
[   17.543885][    C0]  handle_softirqs (kernel/softirq.c:623)
[   17.544281][    C0]  ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1273)
[   17.544646][    C0]  do_softirq (kernel/softirq.c:523 kernel/softirq.c:510)
[   17.544925][    C0]  </IRQ>
[   17.545114][    C0]  <TASK>
[   17.545297][    C0]  __local_bh_enable_ip (kernel/softirq.c:450)
[   17.545673][    C0]  __neigh_event_send (net/core/neighbour.c:1274)
[   17.546079][    C0]  neigh_resolve_output (net/core/neighbour.c:1578)
[   17.546485][    C0]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   17.546855][    C0]  ? ___neigh_create (net/core/neighbour.c:727)
[   17.547255][    C0]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   17.547642][    C0]  ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/ip.h:504 ./include/net/ip.h:518)
[   17.548019][    C0]  ? ip_append_data.part.0 (net/ipv4/ip_output.c:201)
[   17.548382][    C0]  ? ip_skb_dst_mtu (./include/net/ip.h:523)
[   17.548756][    C0]  ? __ip_finish_output (./include/linux/skbuff.h:1724 ./include/linux/skbuff.h:5149 net/ipv4/ip_output.c:309 net/ipv4/ip_output.c:297)
[   17.549136][    C0]  ip_output (./include/linux/netfilter.h:307 net/ipv4/ip_output.c:438)
[   17.549408][    C0]  ? ip_finish_output (net/ipv4/ip_output.c:429)
[   17.549779][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.550162][    C0]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   17.550524][    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:1585 (discriminator 4))
[   17.550892][    C0]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   17.551281][    C0]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   17.551656][    C0]  ? tcp_fastopen_cache_get (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/ipv4/tcp_metrics.c:581)
[   17.552040][    C0]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   17.552419][    C0]  ? tcp_fastopen_no_cookie (./include/net/net_namespace.h:414 ./include/net/sock.h:695 net/ipv4/tcp_fastopen.c:342)
[   17.552794][    C0]  tcp_send_syn_data (net/ipv4/tcp_output.c:1646 net/ipv4/tcp_output.c:4245)
[   17.553196][    C0]  tcp_connect (net/ipv4/tcp_output.c:4336 (discriminator 2))
[   17.553571][    C0]  tcp_v4_connect (net/ipv4/tcp_ipv4.c:347)
[   17.553955][    C0]  ? tcp_v4_conn_request (net/ipv4/tcp_ipv4.c:225)
[   17.554329][    C0]  ? kasan_save_stack (mm/kasan/common.c:58)
[   17.554708][    C0]  ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:69 mm/kasan/common.c:78)
[   17.555087][    C0]  ? __kasan_kmalloc (mm/kasan/common.c:421)
[   17.555449][    C0]  ? tcp_sendmsg_fastopen (net/ipv4/tcp.c:1046)
[   17.555806][    C0]  ? tcp_sendmsg_locked (net/ipv4/tcp.c:1143)
[   17.556187][    C0]  ? tcp_sendmsg (net/ipv4/tcp.c:1413)
[   17.556566][    C0]  ? __sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2244)
[   17.556938][    C0]  tcp_v6_connect (net/ipv6/tcp_ipv6.c:241)
[   17.557306][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   17.557677][    C0]  ? inet6_sk_rx_dst_set (net/ipv6/tcp_ipv6.c:138)
[   17.558082][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.558457][    C0]  ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194)
[   17.558917][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   17.559304][    C0]  __inet_stream_connect (net/ipv4/af_inet.c:679)
[   17.559667][    C0]  ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:69 mm/kasan/common.c:78)
[   17.560055][    C0]  tcp_sendmsg_fastopen (net/ipv4/tcp.c:1069)
[   17.560416][    C0]  tcp_sendmsg_locked (net/ipv4/tcp.c:1143)
[   17.560795][    C0]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   17.561170][    C0]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   17.561549][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   17.561928][    C0]  ? tcp_sendmsg_fastopen (net/ipv4/tcp.c:1078)
[   17.562285][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.562649][    C0]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   17.563038][    C0]  tcp_sendmsg (net/ipv4/tcp.c:1413)
[   17.563311][    C0]  __sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2244)
[   17.563669][    C0]  ? __ia32_sys_getpeername (net/socket.c:2211)
[   17.564067][    C0]  ? fd_install (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 fs/file.c:676)
[   17.564427][    C0]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   17.564788][    C0]  ? fd_install (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:981 fs/file.c:676)
[   17.565154][    C0]  ? __sys_socket (net/socket.c:516 net/socket.c:1756)
[   17.565518][    C0]  ? update_socket_protocol+0x10/0x10
[   17.565882][    C0]  ? do_user_addr_fault (./include/linux/mmap_lock.h:396 arch/x86/mm/fault.c:1415)
[   17.566264][    C0]  __x64_sys_sendto (net/socket.c:2247)
[   17.566628][    C0]  ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:124 arch/x86/entry/syscall_64.c:90)
[   17.566993][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   17.567364][    C0]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   17.567737][    C0]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   17.568209][    C0] RIP: 0033:0x7fafe6e0827a
[   17.568602][    C0] 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
[   17.569916][    C0] RSP: 002b:00007fffe96c7aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   17.570493][    C0] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fafe6e0827a
[   17.571072][    C0] RDX: 000000000000000d RSI: 000000000040213e RDI: 0000000000000005
[   17.571653][    C0] RBP: 0000000000000005 R08: 00000000004040c0 R09: 000000000000001c
[   17.572200][    C0] R10: 0000000020000000 R11: 0000000000000246 R12: 00007fffe96c89d8


Finger prints:
__dev_xmit_skb:__dev_queue_xmit:__neigh_update:arp_process:__netif_receive_skb_one_core