======================================
| 0
| xx__-> [   10.240490][  T228] ------------[ cut here ]------------
| [ 10.240847][ T228] WARNING: CPU: 0 PID: 228 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) 
| [   10.241424][  T228] Modules linked in: netdevsim
[   10.242091][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.242368][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.242655][ T228] 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
[   10.243422][  T228] RSP: 0018:ffffc90000af7520 EFLAGS: 00010246
[   10.243704][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.244035][  T228] RDX: 0000000000000000 RSI: ffff88800bbe2c98 RDI: ffff888009f1ae38
[   10.244379][  T228] RBP: ffffffffaa523440 R08: 0000000000000000 R09: fffffbfff507d83c
[   10.244709][  T228] R10: ffffffffa83ec1e7 R11: ffff888009f1a300 R12: 0000000000000000
[   10.245043][  T228] R13: ffff88800bbe2128 R14: ffff88800bbe2008 R15: ffff88800bbe2000
[   10.245381][  T228] FS:  00007f1e78fb0740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   10.245787][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.246080][  T228] CR2: 0000556a5ad1d4c8 CR3: 000000000a04a004 CR4: 0000000000772ef0
[   10.246415][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.246753][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.247095][  T228] PKRU: 55555554
[   10.247272][  T228] Call Trace:
[   10.247455][  T228]  <TASK>
[ 10.247580][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.247817][ T228] ? __warn (kernel/panic.c:748) 
[ 10.247996][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.248315][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.248551][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.248728][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.248957][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.249211][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.249440][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.249724][ T228] ? _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) 
[ 10.249963][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.250206][ T228] register_netdevice (net/core/dev.c:11003) 
[ 10.250443][ T228] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.250677][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.250935][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.251251][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 10.251430][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.251737][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.252039][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 10.252350][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 10.252597][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 10.252891][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 10.253192][ T228] ? 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)) 
[ 10.253360][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 10.253589][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 10.253814][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 10.254036][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 10.254267][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 10.254492][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 10.254764][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 10.254991][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 10.255224][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.255446][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.255670][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 10.255898][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 10.256131][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 10.256352][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.256576][ T228] ? 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) 
[ 10.256806][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 10.257028][ T228] device_add (drivers/base/core.c:3672) 
[ 10.257263][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 10.257488][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 10.257722][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 10.258008][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 10.258304][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.258529][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 10.258756][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.258979][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 10.259218][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 10.259396][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 10.259622][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.259840][ T228] ? 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) 
[ 10.260081][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.260312][ T228] ksys_write (fs/read_write.c:731) 
[ 10.260489][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 10.260706][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.260975][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.261210][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.261484][  T228] RIP: 0033:0x7f1e790f1b77
[ 10.261720][ T228] 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
[   10.262500][  T228] RSP: 002b:00007ffea0088648 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   10.262846][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f1e790f1b77
[   10.263190][  T228] RDX: 0000000000000007 RSI: 0000556a5ad1c4c0 RDI: 0000000000000001
[   10.263530][  T228] RBP: 0000556a5ad1c4c0 R08: 0000000000000003 R09: 0000000000000077
[   10.263871][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   10.264228][  T228] R13: 00007f1e791ad760 R14: 0000000000000007 R15: 00007f1e791a89c0
| [   10.556159][  T257] ------------[ cut here ]------------
| [ 10.556470][ T257] WARNING: CPU: 3 PID: 257 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) 
| [   10.556896][  T257] Modules linked in: netdevsim
| [   10.557623][  T257] Tainted: [W]=WARN
[   10.557806][  T257] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.558099][ T257] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.558356][ T257] 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
[   10.559057][  T257] RSP: 0018:ffffc900005371e8 EFLAGS: 00010246
[   10.559324][  T257] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.559638][  T257] RDX: 0000000000000000 RSI: ffff88800b0b2c98 RDI: ffff888008c65080
[   10.559937][  T257] RBP: ffff88800b070040 R08: 0000000000000000 R09: fffffbfff507d83c
[   10.560261][  T257] R10: ffffffffa83ec1e7 R11: ffff888008c645c0 R12: 0000000000000000
[   10.560564][  T257] R13: ffff88800b0b2128 R14: ffff88800b0b2008 R15: ffff88800b0b2000
[   10.560871][  T257] FS:  00007f50bf679800(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   10.561236][  T257] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.561489][  T257] CR2: 00007fb7c201f400 CR3: 000000000b6ec002 CR4: 0000000000772ef0
[   10.561796][  T257] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.562111][  T257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.562413][  T257] PKRU: 55555554
[   10.562569][  T257] Call Trace:
[   10.562723][  T257]  <TASK>
[ 10.562828][ T257] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.563033][ T257] ? __warn (kernel/panic.c:748) 
[ 10.563203][ T257] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.563444][ T257] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.563666][ T257] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.563822][ T257] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.564030][ T257] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.564260][ T257] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.564468][ T257] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.564674][ T257] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.564936][ T257] ? _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) 
[ 10.565161][ T257] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.565375][ T257] register_netdevice (net/core/dev.c:11003) 
[ 10.565588][ T257] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.565803][ T257] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.566026][ T257] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.566356][ T257] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.566633][ T257] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 10.566901][ T257] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 10.567176][ T257] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 10.567435][ T257] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 10.567704][ T257] devlink_reload (net/devlink/dev.c:474) 
[ 10.567921][ T257] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 10.568139][ T257] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 10.568352][ T257] ? cap_capable (security/commoncap.c:131) 
[ 10.568555][ T257] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 10.568718][ T257] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 10.568925][ T257] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.569191][ T257] ? __nla_parse (lib/nlattr.c:732) 
[ 10.569416][ T257] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 10.569633][ T257] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 10.569907][ T257] ? cap_capable (security/commoncap.c:131) 
[ 10.570122][ T257] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 10.570342][ T257] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 10.570557][ T257] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 10.570764][ T257] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 10.571030][ T257] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.571303][ T257] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 10.571585][ T257] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 10.571794][ T257] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 10.572003][ T257] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 10.572232][ T257] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 10.572461][ T257] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 10.572627][ T257] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 10.572850][ T257] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 10.573085][ T257] genl_rcv (net/netlink/genetlink.c:1220) 
[ 10.573250][ T257] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 10.573476][ T257] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 10.573697][ T257] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 10.573919][ T257] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 10.574152][ T257] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.574378][ T257] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 10.574593][ T257] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 10.574811][ T257] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 10.575023][ T257] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 10.575240][ T257] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.575452][ T257] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 10.575677][ T257] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.575896][ T257] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 10.576164][ T257] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.576379][ T257] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 10.576646][ T257] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 10.576862][ T257] __x64_sys_sendto (net/socket.c:2181) 
[ 10.577081][ T257] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.577342][ T257] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.577558][ T257] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.577816][  T257] RIP: 0033:0x7f50bf885a4a
[ 10.578031][ T257] 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
[   10.578771][  T257] RSP: 002b:00007ffed276f358 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   10.579093][  T257] RAX: ffffffffffffffda RBX: 00000000120f4b00 RCX: 00007f50bf885a4a
[   10.579394][  T257] RDX: 0000000000000040 RSI: 00000000120f4b00 RDI: 0000000000000005
[   10.579694][  T257] RBP: 00000000120f4910 R08: 00007f50bfa29200 R09: 000000000000000c
[   10.579994][  T257] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   10.580309][  T257] R13: 00000000120f4910 R14: 0000000000000000 R15: 0000000000000001
| [   37.072376][   T65] ------------[ cut here ]------------
| [ 37.072763][ T65] WARNING: CPU: 3 PID: 65 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) 
| [   37.073155][   T65] Modules linked in: netdevsim
| [   37.073728][   T65] Tainted: [W]=WARN
[   37.073873][   T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   37.074127][   T65] Workqueue: netns cleanup_net
[ 37.074354][ T65] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.074595][ T65] 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
[   37.075257][   T65] RSP: 0018:ffffc90000467620 EFLAGS: 00010246
[   37.075503][   T65] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   37.075786][   T65] RDX: 0000000000000000 RSI: ffff888009bc2c98 RDI: ffff88800874ae10
[   37.076085][   T65] RBP: ffffffffaa523440 R08: 0000000000000000 R09: fffffbfff507d83c
[   37.076369][   T65] R10: ffffffffa83ec1e7 R11: ffff88800874a300 R12: 0000000000000000
[   37.076893][   T65] R13: ffff888009bc2128 R14: ffff888009bc2008 R15: ffff888009bc2000
[   37.077187][   T65] FS:  0000000000000000(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   37.077519][   T65] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.077764][   T65] CR2: 0000556a5ad1c4c0 CR3: 000000000a04a004 CR4: 0000000000772ef0
[   37.078052][   T65] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.078348][   T65] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.078635][   T65] PKRU: 55555554
[   37.078781][   T65] Call Trace:
[   37.078924][   T65]  <TASK>
[ 37.079023][ T65] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.079226][ T65] ? __warn (kernel/panic.c:748) 
[ 37.079378][ T65] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.079578][ T65] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 37.079783][ T65] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 37.079930][ T65] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 37.080130][ T65] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 37.080338][ T65] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.080542][ T65] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 37.080823][ T65] ? _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) 
[ 37.081031][ T65] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 37.081238][ T65] register_netdevice (net/core/dev.c:11003) 
[ 37.081444][ T65] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 37.081655][ T65] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 37.081865][ T65] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 37.082127][ T65] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 37.082385][ T65] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 37.082648][ T65] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 37.082899][ T65] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 37.083160][ T65] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 37.083415][ T65] devlink_reload (net/devlink/dev.c:474) 
[ 37.083617][ T65] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 37.083813][ T65] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 37.084019][ T65] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 37.084223][ T65] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 37.084480][ T65] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 37.084682][ T65] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 37.084881][ T65] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 37.085081][ T65] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 37.085285][ T65] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 37.085477][ T65] ? process_one_work (kernel/workqueue.c:3214) 
[ 37.085680][ T65] process_one_work (kernel/workqueue.c:3238) 
[ 37.085884][ T65] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 37.086090][ T65] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 37.086295][ T65] ? assign_work (kernel/workqueue.c:1200) 
[ 37.086492][ T65] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 37.086686][ T65] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 37.086937][ T65] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 37.087143][ T65] kthread (kernel/kthread.c:464) 
[ 37.087291][ T65] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.087491][ T65] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.087687][ T65] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 37.087878][ T65] ? __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