======================================
| [   26.835047][  T250] netdevsim netdevsim236 eni236np1: set [0, 0] type 1 family 0 port 4789 - 0
| [   26.843797][  T250] ip (250) used greatest stack depth: 24064 bytes left
| [   27.531839][    C1] BUG: spinlock bad magic on CPU#1, ip/261
| [ 27.532051][ C1] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: ip/261, .owner_cpu: 1 
[   27.532503][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.532825][    C1] Call Trace:
[   27.532939][    C1]  <IRQ>
[ 27.533009][ C1] dump_stack_lvl (lib/dump_stack.c:122) 
[ 27.533158][ C1] do_raw_spin_unlock (kernel/locking/spinlock_debug.c:100 kernel/locking/spinlock_debug.c:141) 
[ 27.533298][ C1] _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 27.533437][ C1] 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) 
[ 27.533576][ C1] handle_softirqs (kernel/softirq.c:554) 
[ 27.533721][ C1] ? 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) 
[ 27.533860][ C1] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) 
[   27.533960][    C1]  </IRQ>
[   27.534029][    C1]  <TASK>
[ 27.534100][ C1] __local_bh_enable_ip (kernel/softirq.c:382) 
[ 27.534238][ C1] dev_deactivate_many (net/sched/sch_generic.c:1356) 
[ 27.534384][ C1] __dev_close_many (net/core/dev.c:1547) 
[ 27.534526][ C1] ? __pfx___dev_close_many (net/core/dev.c:1522) 
[ 27.534663][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4273) 
[ 27.534798][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.534965][ C1] __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) 
[ 27.535100][ C1] ? __pfx___dev_change_flags (net/core/dev.c:8802) 
[ 27.535245][ C1] dev_change_flags (net/core/dev.c:8910) 
[ 27.535382][ C1] do_setlink (net/core/rtnetlink.c:2900) 
[ 27.535519][ C1] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 27.535656][ C1] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 27.535791][ C1] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 27.535933][ C1] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 27.536071][ C1] ? __kernel_text_address (kernel/extable.c:79) 
[ 27.536205][ C1] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 27.536341][ C1] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 27.536517][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 27.536655][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 27.536791][ C1] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 27.536924][ C1] ? stack_depot_save_flags (lib/stackdepot.c:609) 
[ 27.537071][ C1] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 27.537173][ C1] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 27.537310][ C1] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 27.537443][ C1] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 27.537587][ C1] ? __kasan_kmalloc (mm/kasan/common.c:391) 
[ 27.537722][ C1] ? rtnl_newlink (./include/linux/slab.h:681 net/core/rtnetlink.c:3739) 
[ 27.537857][ C1] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 27.537990][ C1] ? netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 27.538126][ C1] ? netlink_unicast (net/netlink/af_netlink.c:1329 net/netlink/af_netlink.c:1357) 
[ 27.538263][ C1] ? __nla_validate_parse (./include/net/netlink.h:1267 (discriminator 1) lib/nlattr.c:622 (discriminator 1)) 
[ 27.538398][ C1] ? ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 27.538543][ C1] ? ___sys_sendmsg (net/socket.c:2653) 
[ 27.538681][ C1] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 27.538824][ 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:227) 
[ 27.538967][ C1] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 27.539103][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.539275][ C1] ? __create_object (mm/kmemleak.c:751) 
[ 27.539414][ C1] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 27.539553][ C1] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 27.539655][ C1] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 27.539792][ C1] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 27.539934][ 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:227) 
[ 27.540070][ C1] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 27.540174][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 27.540307][ C1] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 27.540442][ C1] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 27.540578][ C1] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 27.540716][ C1] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 27.540852][ C1] ? 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) 
[ 27.540990][ C1] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 27.541126][ C1] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 27.541259][ C1] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 27.541395][ C1] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 27.541536][ C1] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 27.541672][ C1] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 27.541806][ C1] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 27.541942][ C1] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 27.542078][ C1] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 27.542216][ C1] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 27.542385][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 27.542522][ C1] ___sys_sendmsg (net/socket.c:2653) 
[ 27.542659][ C1] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 27.542797][ C1] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 27.542934][ C1] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 27.543069][ C1] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 27.543235][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 27.543373][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 27.543510][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.543704][ C1] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 27.543850][ C1] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 27.543983][ C1] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 27.544125][ C1] ? __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) 
[ 27.544264][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.544401][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.544579][    C1] RIP: 0033:0x7f13d74807b7
[ 27.544723][ C1] 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)
[   27.545217][    C1] RSP: 002b:00007ffd82fa02c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.545432][    C1] RAX: ffffffffffffffda RBX: 00007ffd82fa09f0 RCX: 00007f13d74807b7
[   27.545640][    C1] RDX: 0000000000000000 RSI: 00007ffd82fa0330 RDI: 0000000000000005
[   27.545851][    C1] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   27.546073][    C1] R10: 00007f13d733eef8 R11: 0000000000000246 R12: 0000000000000003


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