======================================
| 0
| xx__-> [   10.374161][  T227] ------------[ cut here ]------------
| [ 10.374956][ 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) 
| [   10.375688][  T227] Modules linked in: netdevsim
[   10.377096][  T227] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.377557][ T227] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.378062][ 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
[   10.379695][  T227] RSP: 0018:ffffc90000af7520 EFLAGS: 00010246
[   10.380198][  T227] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.380795][  T227] RDX: 0000000000000000 RSI: ffff888009502c98 RDI: ffff88800ace2e38
[   10.381390][  T227] RBP: ffffffffbfb23440 R08: 0000000000000000 R09: fffffbfff7b3d83c
[   10.381967][  T227] R10: ffffffffbd9ec1e7 R11: ffff88800ace2300 R12: 0000000000000000
[   10.382581][  T227] R13: ffff888009502128 R14: ffff888009502008 R15: ffff888009502000
[   10.383218][  T227] FS:  00007fd5fb9e4740(0000) GS:ffff88802f780000(0000) knlGS:0000000000000000
[   10.383835][  T227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.384340][  T227] CR2: 0000561a34b09598 CR3: 000000000bdfa001 CR4: 0000000000772ef0
[   10.384905][  T227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.385485][  T227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.385962][  T227] PKRU: 55555554
[   10.386252][  T227] Call Trace:
[   10.386519][  T227]  <TASK>
[ 10.386704][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.387100][ T227] ? __warn (kernel/panic.c:748) 
[ 10.387389][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.387790][ T227] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.388190][ T227] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.388486][ T227] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.388825][ T227] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.389174][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.389520][ T227] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.389954][ 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) 
[ 10.390303][ T227] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.390666][ T227] register_netdevice (net/core/dev.c:11003) 
[ 10.391042][ T227] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.391420][ T227] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.391817][ T227] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.392305][ T227] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 10.392608][ T227] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.393112][ T227] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.393541][ T227] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 10.393990][ T227] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 10.394367][ T227] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 10.394792][ T227] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 10.395182][ 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)) 
[ 10.395458][ T227] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 10.395834][ T227] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 10.396263][ T227] __driver_probe_device (drivers/base/dd.c:800) 
[ 10.396626][ T227] driver_probe_device (drivers/base/dd.c:830) 
[ 10.396968][ T227] __device_attach_driver (drivers/base/dd.c:959) 
[ 10.397352][ T227] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 10.397812][ T227] bus_for_each_drv (drivers/base/bus.c:462) 
[ 10.398183][ T227] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 10.398479][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.398799][ T227] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.399142][ T227] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 10.399492][ T227] __device_attach (drivers/base/dd.c:1030) 
[ 10.399848][ T227] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 10.400253][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.400655][ 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) 
[ 10.401059][ T227] bus_probe_device (drivers/base/bus.c:537) 
[ 10.401490][ T227] device_add (drivers/base/core.c:3672) 
[ 10.401872][ T227] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 10.402256][ T227] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 10.402661][ T227] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 10.403119][ T227] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 10.403831][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.404183][ T227] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 10.404526][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.404886][ T227] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 10.405259][ T227] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 10.405548][ T227] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 10.405934][ T227] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.406441][ 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) 
[ 10.406843][ T227] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.407228][ T227] ksys_write (fs/read_write.c:731) 
[ 10.407516][ T227] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 10.407896][ T227] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.408302][ T227] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.408617][ T227] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.409005][  T227] RIP: 0033:0x7fd5fbb25b77
[ 10.409414][ 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
[   10.410613][  T227] RSP: 002b:00007ffefcc01368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   10.411227][  T227] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fd5fbb25b77
[   10.411905][  T227] RDX: 0000000000000007 RSI: 0000561a34b08590 RDI: 0000000000000001
[   10.412418][  T227] RBP: 0000561a34b08590 R08: 0000000000000003 R09: 0000000000000077
[   10.412937][  T227] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   10.413458][  T227] R13: 00007fd5fbbe1760 R14: 0000000000000007 R15: 00007fd5fbbdc9c0
| [   10.716169][  T246] ------------[ cut here ]------------
| [ 10.716516][ T246] WARNING: CPU: 0 PID: 246 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) 
| [   10.716970][  T246] Modules linked in: netdevsim
| [   10.717727][  T246] Tainted: [W]=WARN
[   10.717916][  T246] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.718208][ T246] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.718493][ T246] 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
[   10.719279][  T246] RSP: 0018:ffffc90000b271e8 EFLAGS: 00010246
[   10.719558][  T246] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.719887][  T246] RDX: 0000000000000000 RSI: ffff88800259ac98 RDI: ffff88800bdc0b00
[   10.720232][  T246] RBP: ffff8880092b0040 R08: 0000000000000000 R09: fffffbfff7b3d83c
[   10.720555][  T246] R10: ffffffffbd9ec1e7 R11: ffff88800bdc0040 R12: 0000000000000000
[   10.720880][  T246] R13: ffff88800259a128 R14: ffff88800259a008 R15: ffff88800259a000
[   10.721213][  T246] FS:  00007f6fce074800(0000) GS:ffff88802f600000(0000) knlGS:0000000000000000
[   10.721590][  T246] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.721868][  T246] CR2: 00007f6fce280a30 CR3: 0000000002534001 CR4: 0000000000772ef0
[   10.722238][  T246] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.722605][  T246] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.722934][  T246] PKRU: 55555554
[   10.723115][  T246] Call Trace:
[   10.723289][  T246]  <TASK>
[ 10.723407][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.723638][ T246] ? __warn (kernel/panic.c:748) 
[ 10.723820][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.724047][ T246] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.724297][ T246] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.724469][ T246] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.724693][ T246] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.724941][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.725166][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.725391][ T246] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.725675][ T246] ? _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) 
[ 10.725909][ T246] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.726165][ T246] register_netdevice (net/core/dev.c:11003) 
[ 10.726391][ T246] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.726622][ T246] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.726859][ T246] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.727159][ T246] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.727452][ T246] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 10.727739][ T246] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 10.728020][ T246] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 10.728308][ T246] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 10.728602][ T246] devlink_reload (net/devlink/dev.c:474) 
[ 10.728830][ T246] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 10.729046][ T246] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 10.729287][ T246] ? cap_capable (security/commoncap.c:131) 
[ 10.729506][ T246] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 10.729681][ T246] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 10.729908][ T246] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.730217][ T246] ? __nla_parse (lib/nlattr.c:732) 
[ 10.730452][ T246] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 10.730675][ T246] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 10.730968][ T246] ? cap_capable (security/commoncap.c:131) 
[ 10.731199][ T246] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 10.731423][ T246] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 10.731649][ T246] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 10.731925][ T246] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.732200][ T246] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 10.732481][ T246] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 10.732718][ T246] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 10.732937][ T246] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 10.733167][ T246] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 10.733409][ T246] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 10.733577][ T246] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 10.733801][ T246] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 10.734029][ T246] genl_rcv (net/netlink/genetlink.c:1220) 
[ 10.734215][ T246] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 10.734441][ T246] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 10.734657][ T246] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 10.734904][ T246] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 10.735146][ T246] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.735363][ T246] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 10.735587][ T246] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 10.735813][ T246] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 10.736036][ T246] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 10.736277][ T246] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.736493][ T246] ? 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) 
[ 10.736733][ T246] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.736956][ T246] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.737193][ T246] ? 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) 
[ 10.737416][ T246] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.737639][ T246] __x64_sys_sendto (net/socket.c:2181) 
[ 10.737861][ T246] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.738162][ T246] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.738387][ T246] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.738658][  T246] RIP: 0033:0x7f6fce280a4a
[ 10.738885][ T246] Code: Unable to access opcode bytes at 0x7f6fce280a20.

Code starting with the faulting instruction
===========================================
[   10.739176][  T246] RSP: 002b:00007ffdc47bd568 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   10.739502][  T246] RAX: ffffffffffffffda RBX: 0000000004229b00 RCX: 00007f6fce280a4a
[   10.739819][  T246] RDX: 0000000000000040 RSI: 0000000004229b00 RDI: 0000000000000005
[   10.740148][  T246] RBP: 0000000004229910 R08: 00007f6fce424200 R09: 000000000000000c
[   10.740471][  T246] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   10.740789][  T246] R13: 0000000004229910 R14: 0000000000000000 R15: 0000000000000001
| [   80.523984][   T64] ------------[ cut here ]------------
| [ 80.524349][ T64] WARNING: CPU: 0 PID: 64 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) 
| [   80.524692][   T64] Modules linked in: netdevsim
| [   80.525224][   T64] Tainted: [W]=WARN
[   80.525355][   T64] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   80.525568][   T64] Workqueue: netns cleanup_net
[ 80.525763][ T64] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 80.525982][ T64] 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
[   80.526586][   T64] RSP: 0018:ffffc90000457620 EFLAGS: 00010246
[   80.526807][   T64] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   80.527082][   T64] RDX: 0000000000000000 RSI: ffff88800265ac98 RDI: ffff888008e00b50
[   80.527337][   T64] RBP: ffffffffbfb23440 R08: 0000000000000000 R09: fffffbfff7b3d83c
[   80.527598][   T64] R10: ffffffffbd9ec1e7 R11: ffff888008e00040 R12: 0000000000000000
[   80.527851][   T64] R13: ffff88800265a128 R14: ffff88800265a008 R15: ffff88800265a000
[   80.528114][   T64] FS:  0000000000000000(0000) GS:ffff88802f600000(0000) knlGS:0000000000000000
[   80.528492][   T64] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   80.528711][   T64] CR2: 00007faf501e32f0 CR3: 00000000093fe005 CR4: 0000000000772ef0
[   80.528966][   T64] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   80.529270][   T64] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   80.529528][   T64] PKRU: 55555554
[   80.529654][   T64] Call Trace:
[   80.529783][   T64]  <TASK>
[ 80.529872][ T64] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 80.530050][ T64] ? __warn (kernel/panic.c:748) 
[ 80.530196][ T64] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 80.530370][ T64] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 80.530552][ T64] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 80.530689][ T64] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 80.530863][ T64] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 80.531050][ T64] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 80.531243][ T64] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 80.531467][ T64] ? _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) 
[ 80.531645][ T64] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 80.531822][ T64] register_netdevice (net/core/dev.c:11003) 
[ 80.532002][ T64] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 80.532206][ T64] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 80.532400][ T64] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 80.532626][ T64] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 80.532862][ T64] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 80.533106][ T64] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 80.533334][ T64] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 80.533551][ T64] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 80.533781][ T64] devlink_reload (net/devlink/dev.c:474) 
[ 80.533960][ T64] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 80.534143][ T64] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 80.534327][ T64] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 80.534502][ T64] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 80.534731][ T64] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 80.534907][ T64] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 80.535092][ T64] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 80.535263][ T64] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 80.535443][ T64] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 80.535614][ T64] ? process_one_work (kernel/workqueue.c:3214) 
[ 80.535794][ T64] process_one_work (kernel/workqueue.c:3238) 
[ 80.535978][ T64] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 80.536162][ T64] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 80.536346][ T64] ? assign_work (kernel/workqueue.c:1200) 
[ 80.536524][ T64] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 80.536701][ T64] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 80.536941][ T64] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 80.537125][ T64] kthread (kernel/kthread.c:464) 
[ 80.537259][ T64] ? __pfx_kthread (kernel/kthread.c:413) 
[ 80.537442][ T64] ? __pfx_kthread (kernel/kthread.c:413) 
[ 80.537616][ T64] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 80.537788][ T64] ? __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