======================================
| 0
| xx__-> [    9.808958][  T227] ------------[ cut here ]------------
| [ 9.809623][ T227] WARNING: CPU: 3 PID: 227 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [    9.810100][  T227] Modules linked in: netdevsim
[    9.810797][  T227] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.811127][ T227] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.811425][ T227] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 00 85 c0 0f 85 99 00 00 00 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 20 48 c1 ea 03
All code
========
   0:	00 e8                	add    %ch,%al
   2:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 99 00 00 00    	jne    0xc2
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  12:	48 c1 ea 03          	shr    $0x3,%rdx
[    9.812237][  T227] RSP: 0018:ffffc90000b07520 EFLAGS: 00010246
[    9.812551][  T227] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.812901][  T227] RDX: 0000000000000000 RSI: ffff8880148fac98 RDI: ffff8880110250f8
[    9.813273][  T227] RBP: ffffffffa3723440 R08: 0000000000000000 R09: fffffbfff42bd83c
[    9.813681][  T227] R10: ffffffffa15ec1e7 R11: ffff8880110245c0 R12: 0000000000000000
[    9.814025][  T227] R13: ffff8880148fa128 R14: ffff8880148fa008 R15: ffff8880148fa000
[    9.814493][  T227] FS:  00007f33358ac740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[    9.814919][  T227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.815219][  T227] CR2: 0000563e08ef24c8 CR3: 000000000259a004 CR4: 0000000000772ef0
[    9.815567][  T227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.815909][  T227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.816281][  T227] PKRU: 55555554
[    9.816461][  T227] Call Trace:
[    9.816646][  T227]  <TASK>
[ 9.816774][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.817019][ T227] ? __warn (kernel/panic.c:748) 
[ 9.817232][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.817465][ T227] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.817704][ T227] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.817878][ T227] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.818109][ T227] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.818374][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.818618][ T227] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.818902][ T227] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 9.819146][ T227] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.819379][ T227] register_netdevice (net/core/dev.c:11003) 
[ 9.819630][ T227] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.819872][ T227] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.820149][ T227] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.820446][ T227] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 9.820644][ T227] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.820968][ T227] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.821293][ T227] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 9.821591][ T227] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 9.821843][ T227] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 9.822166][ T227] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 9.822410][ T227] ? kernfs_put (./arch/x86/include/asm/atomic.h:67 (discriminator 1) ./include/linux/atomic/atomic-arch-fallback.h:2278 (discriminator 1) ./include/linux/atomic/atomic-instrumented.h:1384 (discriminator 1) fs/kernfs/dir.c:557 (discriminator 1)) 
[ 9.822592][ T227] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 9.822828][ T227] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 9.823082][ T227] __driver_probe_device (drivers/base/dd.c:800) 
[ 9.823336][ T227] driver_probe_device (drivers/base/dd.c:830) 
[ 9.823582][ T227] __device_attach_driver (drivers/base/dd.c:959) 
[ 9.823824][ T227] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 9.824133][ T227] bus_for_each_drv (drivers/base/bus.c:462) 
[ 9.824375][ T227] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 9.824635][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.824962][ T227] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.825242][ T227] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 9.825523][ T227] __device_attach (drivers/base/dd.c:1030) 
[ 9.825800][ T227] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 9.826083][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.826375][ T227] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 9.826660][ T227] bus_probe_device (drivers/base/bus.c:537) 
[ 9.826953][ T227] device_add (drivers/base/core.c:3672) 
[ 9.827250][ T227] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 9.827516][ T227] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 9.827793][ T227] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 9.828160][ T227] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 9.828505][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.828765][ T227] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 9.829034][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.829321][ T227] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 9.829590][ T227] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 9.829799][ T227] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 9.830067][ T227] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 9.830344][ T227] ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 9.830623][ T227] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 9.830904][ T227] ksys_write (fs/read_write.c:731) 
[ 9.831136][ T227] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 9.831402][ T227] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 9.831672][ T227] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.831939][ T227] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.832271][  T227] RIP: 0033:0x7f33359edb77
[ 9.832560][ T227] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
All code
========
   0:	0b 00                	or     (%rax),%eax
   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 b7                	jmp    0xffffffffffffffc7
  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 01 00 00 00       	mov    $0x1,%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:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	74 24                	je     0x64

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:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	74 24                	je     0x3a
[    9.833496][  T227] RSP: 002b:00007ffc8a66df08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[    9.833937][  T227] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f33359edb77
[    9.834338][  T227] RDX: 0000000000000007 RSI: 0000563e08ef14c0 RDI: 0000000000000001
[    9.834759][  T227] RBP: 0000563e08ef14c0 R08: 0000000000000003 R09: 0000000000000077
[    9.835186][  T227] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[    9.835578][  T227] R13: 00007f3335aa9760 R14: 0000000000000007 R15: 00007f3335aa49c0
| [   10.251880][  T254] ------------[ cut here ]------------
| [ 10.252543][ T254] WARNING: CPU: 1 PID: 254 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [   10.253649][  T254] Modules linked in: netdevsim
| [   10.254488][  T254] Tainted: [W]=WARN
[   10.254821][  T254] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.255192][ T254] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.255598][ T254] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 00 85 c0 0f 85 99 00 00 00 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 20 48 c1 ea 03
All code
========
   0:	00 e8                	add    %ch,%al
   2:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 99 00 00 00    	jne    0xc2
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  12:	48 c1 ea 03          	shr    $0x3,%rdx
[   10.256793][  T254] RSP: 0018:ffffc900005071e8 EFLAGS: 00010246
[   10.257218][  T254] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.257736][  T254] RDX: 0000000000000000 RSI: ffff888014a32c98 RDI: ffff888005135080
[   10.258202][  T254] RBP: ffff888002b40040 R08: 0000000000000000 R09: fffffbfff42bd83c
[   10.258645][  T254] R10: ffffffffa15ec1e7 R11: ffff8880051345c0 R12: 0000000000000000
[   10.259043][  T254] R13: ffff888014a32128 R14: ffff888014a32008 R15: ffff888014a32000
[   10.259461][  T254] FS:  00007f090ad7f800(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   10.260337][  T254] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.260680][  T254] CR2: 0000563dfb6aa990 CR3: 0000000012a14003 CR4: 0000000000772ef0
[   10.261239][  T254] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.261710][  T254] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.262172][  T254] PKRU: 55555554
[   10.262407][  T254] Call Trace:
[   10.262622][  T254]  <TASK>
[ 10.262773][ T254] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.263142][ T254] ? __warn (kernel/panic.c:748) 
[ 10.263388][ T254] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.263704][ T254] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.264024][ T254] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.264250][ T254] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.264520][ T254] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.264817][ T254] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.265092][ T254] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.265380][ T254] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.265704][ T254] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 10.265976][ T254] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.266260][ T254] register_netdevice (net/core/dev.c:11003) 
[ 10.266531][ T254] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.266804][ T254] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.267103][ T254] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.267471][ T254] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.267825][ T254] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 10.268205][ T254] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 10.268618][ T254] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 10.269030][ T254] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 10.269441][ T254] devlink_reload (net/devlink/dev.c:474) 
[ 10.269769][ T254] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 10.270104][ T254] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 10.270489][ T254] ? cap_capable (security/commoncap.c:131) 
[ 10.270780][ T254] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 10.270984][ T254] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 10.271296][ T254] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.271628][ T254] ? __nla_parse (lib/nlattr.c:732) 
[ 10.271900][ T254] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 10.272185][ T254] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 10.272519][ T254] ? cap_capable (security/commoncap.c:131) 
[ 10.272775][ T254] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 10.273045][ T254] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 10.273358][ T254] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 10.273625][ T254] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 10.273938][ T254] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.274271][ T254] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 10.274706][ T254] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 10.275050][ T254] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 10.275410][ T254] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 10.275714][ T254] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 10.276035][ T254] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 10.276316][ T254] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 10.276655][ T254] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 10.276980][ T254] genl_rcv (net/netlink/genetlink.c:1220) 
[ 10.277221][ T254] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 10.277488][ T254] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 10.277767][ T254] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 10.278078][ T254] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 10.278410][ T254] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.278685][ T254] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 10.278961][ T254] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 10.279278][ T254] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 10.279606][ T254] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 10.279917][ T254] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.280249][ T254] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 10.280571][ T254] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.280875][ T254] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 10.281276][ T254] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 10.281701][ T254] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 10.282041][ T254] __x64_sys_sendto (net/socket.c:2181) 
[ 10.282389][ T254] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.282765][ T254] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.283089][ T254] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.283461][  T254] RIP: 0033:0x7f090af8ba4a
[ 10.283786][ T254] 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
[   10.284932][  T254] RSP: 002b:00007ffd31c751d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   10.285438][  T254] RAX: ffffffffffffffda RBX: 0000000002f9eb00 RCX: 00007f090af8ba4a
[   10.285953][  T254] RDX: 0000000000000040 RSI: 0000000002f9eb00 RDI: 0000000000000005
[   10.286488][  T254] RBP: 0000000002f9e910 R08: 00007f090b12f200 R09: 000000000000000c
[   10.287002][  T254] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   10.287443][  T254] R13: 0000000002f9e910 R14: 0000000000000000 R15: 0000000000000001
| [   37.107661][   T11] ------------[ cut here ]------------
| [ 37.107937][ T11] WARNING: CPU: 0 PID: 11 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [   37.108292][   T11] Modules linked in: netdevsim
| [   37.108813][   T11] Tainted: [W]=WARN
[   37.108942][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   37.109166][   T11] Workqueue: netns cleanup_net
[ 37.109361][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.109578][ T11] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 00 85 c0 0f 85 99 00 00 00 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 20 48 c1 ea 03
All code
========
   0:	00 e8                	add    %ch,%al
   2:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 99 00 00 00    	jne    0xc2
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  12:	48 c1 ea 03          	shr    $0x3,%rdx
[   37.110169][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   37.110387][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   37.110637][   T11] RDX: 0000000000000000 RSI: ffff888014902c98 RDI: ffff888001a82e10
[   37.110891][   T11] RBP: ffffffffa3723440 R08: 0000000000000000 R09: fffffbfff42bd83c
[   37.111151][   T11] R10: ffffffffa15ec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   37.111405][   T11] R13: ffff888014902128 R14: ffff888014902008 R15: ffff888014902000
[   37.111655][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   37.111946][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.112170][   T11] CR2: 00007f6b59f3b2f0 CR3: 0000000005d12004 CR4: 0000000000772ef0
[   37.112517][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.112770][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.113021][   T11] PKRU: 55555554
[   37.113161][   T11] Call Trace:
[   37.113291][   T11]  <TASK>
[ 37.113380][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.113550][ T11] ? __warn (kernel/panic.c:748) 
[ 37.113682][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.113854][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 37.114032][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 37.114173][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 37.114347][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 37.114551][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.114736][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 37.114959][ T11] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:97 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 37.115143][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 37.115324][ T11] register_netdevice (net/core/dev.c:11003) 
[ 37.115501][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 37.115684][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 37.115884][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 37.116167][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 37.116398][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 37.116623][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 37.116843][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 37.117061][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 37.117297][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 37.117474][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 37.117647][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 37.117822][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 37.117996][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 37.118230][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 37.118402][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 37.118576][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 37.118746][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 37.118926][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 37.119093][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 37.119280][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 37.119466][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 37.119635][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 37.119819][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 37.119997][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 37.120184][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 37.120358][ T11] kthread (kernel/kthread.c:464) 
[ 37.120488][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.120665][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.120839][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 37.121004][ T11] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
__netdev_update_features:register_netdevice:nsim_create:__nsim_dev_port_add:nsim_dev_reload_create
__netdev_update_features:register_netdevice:nsim_create:__nsim_dev_port_add:nsim_dev_port_add_all