======================================
| 0
| xx__-> [ 4564.909873][    C2] ------------[ cut here ]------------
| [ 4564.910638][    C2] WARNING: CPU: 2 PID: 2177 at ./include/net/sch_generic.h:843 tc_run (./include/net/sch_generic.h:843 ./include/net/sch_generic.h:889 ./include/net/sch_generic.h:1366 net/core/dev.c:4370)
| [ 4564.911578][    C2] Modules linked in: cls_bpf drop_monitor netdevsim act_gact sch_ingress nft_chain_nat xt_nat nft_compat nf_tables ip6_gre ip_gre gre xfrm_user openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh geneve vxlan act_csum act_pedit cls_flower sch_prio
[ 4564.915432][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4564.916152][    C2] RIP: 0010:tc_run (./include/net/sch_generic.h:843 ./include/net/sch_generic.h:889 ./include/net/sch_generic.h:1366 net/core/dev.c:4370)
[ 4564.916739][    C2] Code: 89 f8 49 c1 e8 03 45 0f b6 04 30 48 89 fe 83 e6 07 83 c6 01 44 38 c6 7c 09 45 84 c0 0f 85 83 02 00 00 66 83 7a 06 00 74 04 90 <0f> 0b 90 48 ba 00 00 00 00 00 fc ff df 48 8d 7b 28 48 89 fe 48 c1
All code
========
   0:	89 f8                	mov    %edi,%eax
   2:	49 c1 e8 03          	shr    $0x3,%r8
   6:	45 0f b6 04 30       	movzbl (%r8,%rsi,1),%r8d
   b:	48 89 fe             	mov    %rdi,%rsi
   e:	83 e6 07             	and    $0x7,%esi
  11:	83 c6 01             	add    $0x1,%esi
  14:	44 38 c6             	cmp    %r8b,%sil
  17:	7c 09                	jl     0x22
  19:	45 84 c0             	test   %r8b,%r8b
  1c:	0f 85 83 02 00 00    	jne    0x2a5
  22:	66 83 7a 06 00       	cmpw   $0x0,0x6(%rdx)
  27:	74 04                	je     0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  34:	fc ff df 
  37:	48 8d 7b 28          	lea    0x28(%rbx),%rdi
  3b:	48 89 fe             	mov    %rdi,%rsi
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
   a:	fc ff df 
   d:	48 8d 7b 28          	lea    0x28(%rbx),%rdi
  11:	48 89 fe             	mov    %rdi,%rsi
  14:	48                   	rex.W
  15:	c1                   	.byte 0xc1
[ 4564.918623][    C2] RSP: 0018:ffffc900002185d0 EFLAGS: 00010202
[ 4564.919323][    C2] RAX: ffffe8ffffd0cee0 RBX: ffff888012dc5e00 RCX: 0000000000008880
[ 4564.920142][    C2] RDX: ffff88800ed11180 RSI: 0000000000000007 RDI: ffff88800ed11186
[ 4564.920964][    C2] RBP: ffffc90000218678 R08: 0000000000000000 R09: ffffed10026f2a39
[ 4564.921779][    C2] R10: ffff8880137951cf R11: ffffffffaa788540 R12: ffffc90000218780
[ 4564.922602][    C2] R13: 1ffff920000430be R14: ffff888012dc5e48 R15: ffff8880051caad0
[ 4564.923408][    C2] FS:  00007fe3d3970b80(0000) GS:ffff8880bb208000(0000) knlGS:0000000000000000
[ 4564.924341][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4564.925445][    C2] CR2: 0000000000a44000 CR3: 0000000011cb1006 CR4: 0000000000772ef0
[ 4564.926259][    C2] PKRU: 55555554
[ 4564.926693][    C2] Call Trace:
[ 4564.927108][    C2]  <IRQ>
[ 4564.927415][    C2]  ? veth_poll (drivers/net/veth.c:981)
[ 4564.927967][    C2]  ? __napi_poll.constprop.0 (net/core/dev.c:7668)
[ 4564.928524][    C2]  ? napi_disable (net/core/dev.c:4349)
[ 4564.929066][    C2]  ? __inet_stream_connect (net/ipv4/af_inet.c:705 (discriminator 1))
[ 4564.929619][    C2]  ? inet_stream_connect (net/ipv4/af_inet.c:751)
[ 4564.930164][    C2]  ? __sys_connect (./include/linux/file.h:62 ./include/linux/file.h:83 net/socket.c:2111)
[ 4564.930729][    C2]  __netif_receive_skb_core.constprop.0 (net/core/dev.c:4448 net/core/dev.c:5989)
[ 4564.931420][    C2]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 4564.931976][    C2]  ? do_xdp_generic (net/core/dev.c:5908)
[ 4564.932528][    C2]  ? __lock_release (kernel/locking/lockdep.c:5536)
[ 4564.933066][    C2]  ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:69 mm/kasan/common.c:78)
[ 4564.933626][    C2]  ? skb_release_data (./include/linux/atomic/atomic-arch-fallback.h:787 ./include/linux/atomic/atomic-instrumented.h:290 ./include/linux/skbuff.h:1310 net/core/skbuff.c:1073)
[ 4564.934191][    C2]  ? kfree_skbmem (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 net/core/skbuff.c:1132)
[ 4564.934749][    C2]  ? skb_pp_cow_data (net/core/skbuff.c:975)
[ 4564.935304][    C2]  __netif_receive_skb_list_core (net/core/dev.c:6214)
[ 4564.935985][    C2]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 4564.936546][    C2]  ? __netif_receive_skb_core.constprop.0 (net/core/dev.c:6191)
[ 4564.937221][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[ 4564.937771][    C2]  ? netif_receive_skb_list_internal (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:867 net/core/dev.c:6356)
[ 4564.938468][    C2]  netif_receive_skb_list_internal (net/core/dev.c:6282 net/core/dev.c:6371)
[ 4564.939147][    C2]  ? gro_receive_skb (net/core/gro.c:637)
[ 4564.939708][    C2]  ? process_backlog (net/core/dev.c:6343)
[ 4564.940262][    C2]  ? ip6_input (net/ipv6/ip6_input.c:496)
[ 4564.940820][    C2]  ? veth_xdp_rcv_skb (drivers/net/veth.c:902)
[ 4564.941368][    C2]  napi_complete_done (./include/linux/list.h:45 ./include/net/gro.h:525 ./include/net/gro.h:520 ./include/net/gro.h:532 net/core/dev.c:6740)
[ 4564.941926][    C2]  ? netif_receive_skb_list (net/core/dev.c:6709)
[ 4564.942524][    C2]  veth_poll (drivers/net/veth.c:984 (discriminator 1))
[ 4564.942944][    C2]  ? veth_xdp_rcv (drivers/net/veth.c:969)
[ 4564.943518][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[ 4564.944063][    C2]  ? trace_pelt_cfs_tp (./include/trace/events/sched.h:833 (discriminator 21))
[ 4564.944614][    C2]  ? __update_load_avg_cfs_rq (kernel/sched/pelt.c:330)
[ 4564.945181][    C2]  __napi_poll.constprop.0 (net/core/dev.c:7668)
[ 4564.945737][    C2]  net_rx_action (net/core/dev.c:7730 net/core/dev.c:7882)
[ 4564.946293][    C2]  ? run_backlog_napi (net/core/dev.c:7844)
[ 4564.946852][    C2]  ? __lock_release (kernel/locking/lockdep.c:5536)
[ 4564.947429][    C2]  ? sched_ttwu_pending (kernel/sched/core.c:4144)
[ 4564.947988][    C2]  handle_softirqs (kernel/softirq.c:623)
[ 4564.948552][    C2]  ? inet_wait_for_connect (net/ipv4/af_inet.c:612)
[ 4564.949098][    C2]  do_softirq (kernel/softirq.c:523 kernel/softirq.c:510)
[ 4564.949532][    C2]  </IRQ>
[ 4564.949826][    C2]  <TASK>
[ 4564.950113][    C2]  __local_bh_enable_ip (kernel/softirq.c:450)
[ 4564.950673][    C2]  inet_wait_for_connect (net/ipv4/af_inet.c:612)
[ 4564.951219][    C2]  ? inet_sock_destruct (net/ipv4/af_inet.c:599)
[ 4564.951777][    C2]  ? __init_waitqueue_head (kernel/sched/wait.c:458)
[ 4564.952315][    C2]  ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[ 4564.952867][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 4564.953428][    C2]  __inet_stream_connect (net/ipv4/af_inet.c:705 (discriminator 1))
[ 4564.953979][    C2]  ? __inet_stream_connect (net/ipv4/af_inet.c:746)
[ 4564.954944][    C2]  inet_stream_connect (net/ipv4/af_inet.c:751)
[ 4564.955509][    C2]  __sys_connect (./include/linux/file.h:62 ./include/linux/file.h:83 net/socket.c:2111)
[ 4564.956051][    C2]  ? __sys_connect_file (net/socket.c:2109)
[ 4564.956988][    C2]  ? fd_install (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 fs/file.c:676)
[ 4564.957552][    C2]  ? fd_install (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:981 fs/file.c:676)
[ 4564.958096][    C2]  ? __sys_socket (net/socket.c:516 net/socket.c:1756)
[ 4564.958651][    C2]  ? update_socket_protocol+0x10/0x10
[ 4564.959229][    C2]  __x64_sys_connect (net/socket.c:2124)
[ 4564.960169][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 4564.960694][    C2]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 4564.961242][    C2]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 4564.962303][    C2] RIP: 0033:0x7fe3d3a82d67
[ 4564.962880][    C2] Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 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:	64 89 01             	mov    %eax,%fs:(%rcx)
   3:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
   7:	c3                   	ret
   8:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   f:	00 00 00 
  12:	90                   	nop
  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
[ 4564.964758][    C2] RSP: 002b:00007ffea8375188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[ 4564.965577][    C2] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe3d3a82d67
[ 4564.966379][    C2] RDX: 000000000000001c RSI: 0000000000a450e0 RDI: 0000000000000005
[ 4564.967584][    C2] RBP: 00007ffea83752d0 R08: 00007ffea83750e0 R09: 0000000000000000
[ 4564.968390][    C2] R10: 00007fe3d3979618 R11: 0000000000000246 R12: 0000000000000005


Finger prints:
tc_run:__netif_receive_skb_list_core:netif_receive_skb_list_internal:napi_complete_done:veth_poll