======================================
| [   27.159179][  T264] eth0: renamed from r1h1
| [   27.514596][  T266] eth1: renamed from r1h2
| [   31.886673][    C3] BUG: spinlock bad magic on CPU#3, ip/294
| [ 31.886958][ C3] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: ip/294, .owner_cpu: 3 
[   31.887416][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.887717][    C3] Call Trace:
[   31.887824][    C3]  <IRQ>
[ 31.887895][ C3] dump_stack_lvl (lib/dump_stack.c:122) 
[ 31.888037][ C3] do_raw_spin_unlock (kernel/locking/spinlock_debug.c:100 kernel/locking/spinlock_debug.c:141) 
[ 31.888176][ C3] _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 31.888313][ C3] net_tx_action (./include/net/sch_generic.h:226 ./include/net/sch_generic.h:217 ./include/net/pkt_sched.h:128 ./include/net/pkt_sched.h:124 net/core/dev.c:5323) 
[ 31.888477][ C3] handle_softirqs (kernel/softirq.c:554) 
[ 31.888632][ C3] ? dev_deactivate_many (./include/linux/bottom_half.h:33 ./include/linux/netdevice.h:4448 net/sched/sch_generic.c:571 net/sched/sch_generic.c:1363) 
[ 31.888776][ C3] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) 
[   31.888882][    C3]  </IRQ>
[   31.888953][    C3]  <TASK>
[ 31.889023][ C3] __local_bh_enable_ip (kernel/softirq.c:382) 
[ 31.889164][ C3] dev_deactivate_many (net/sched/sch_generic.c:1356) 
[ 31.889305][ C3] __dev_close_many (net/core/dev.c:1547) 
[ 31.889445][ C3] ? __pfx___dev_close_many (net/core/dev.c:1522) 
[ 31.889583][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4273) 
[ 31.889734][ C3] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.889903][ C3] __dev_change_flags (./include/linux/list.h:111 ./include/linux/list.h:215 ./include/linux/list.h:229 net/core/dev.c:1571 net/core/dev.c:8836) 
[ 31.890041][ C3] ? __pfx___dev_change_flags (net/core/dev.c:8802) 
[ 31.890177][ C3] ? __dev_change_flags (net/core/dev.c:8833) 
[ 31.890313][ C3] dev_change_flags (net/core/dev.c:8910) 
[ 31.890448][ C3] cycle_netdev (drivers/net/vrf.c:1071) 
[ 31.890555][ C3] vrf_add_slave (drivers/net/vrf.c:1102 drivers/net/vrf.c:1121) 
[ 31.890693][ C3] do_setlink (net/core/rtnetlink.c:2907) 
[ 31.890832][ C3] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 31.890968][ C3] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 31.891107][ C3] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 31.891241][ C3] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 31.891377][ C3] ? __kernel_text_address (kernel/extable.c:79) 
[ 31.891513][ C3] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 31.891649][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 31.891840][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 31.891980][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 31.892120][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 31.892269][ C3] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 31.892406][ C3] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.892508][ C3] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 31.892643][ C3] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 31.892797][ C3] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 31.892948][ C3] ? 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:227) 
[ 31.893084][ C3] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 31.893219][ C3] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.893390][ C3] ? __create_object (mm/kmemleak.c:751) 
[ 31.893525][ C3] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 31.893663][ C3] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 31.893766][ C3] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 31.893902][ C3] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.894038][ C3] ? 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:227) 
[ 31.894174][ C3] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.894277][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 31.894413][ C3] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 31.894554][ C3] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.894689][ C3] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 31.894829][ C3] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 31.894963][ C3] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 31.895099][ C3] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 31.895239][ C3] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 31.895373][ C3] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.895513][ C3] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 31.895651][ C3] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 31.895785][ C3] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 31.895921][ C3] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 31.896059][ C3] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 31.896197][ C3] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 31.896331][ C3] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 31.896499][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 31.896640][ C3] ___sys_sendmsg (net/socket.c:2653) 
[ 31.896778][ C3] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 31.896912][ C3] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.897048][ C3] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 31.897182][ C3] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 31.897353][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 31.897488][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 31.897625][ C3] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.897795][ C3] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 31.897934][ C3] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 31.898069][ C3] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 31.898204][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 31.898343][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 31.898502][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   31.898676][    C3] RIP: 0033:0x7f4cc31757b7
[ 31.898820][ C3] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  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 2e 00 00 00       	mov    $0x2e,%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 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

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 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   31.899311][    C3] RSP: 002b:00007ffe2c099398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   31.899525][    C3] RAX: ffffffffffffffda RBX: 00007ffe2c099ad0 RCX: 00007f4cc31757b7
[   31.899745][    C3] RDX: 0000000000000000 RSI: 00007ffe2c099400 RDI: 0000000000000005
[   31.899949][    C3] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   31.900150][    C3] R10: 0000000006be3910 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
do_raw_spin_unlock:_raw_spin_unlock:net_tx_action:handle_softirqs:do_softirq