======================================
| 0
| xx__-> [   10.746508][  T227] ------------[ cut here ]------------
| [ 10.746947][ T227] WARNING: CPU: 2 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:10596) 
| [   10.747421][  T227] Modules linked in: netdevsim
[   10.748166][  T227] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.748454][ T227] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 10.748750][ T227] Code: 00 e8 b3 48 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 b8 56 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:	b3 48                	mov    $0x48,%bl
   4:	fe                   	(bad)
   5:	ff 48 8b             	decl   -0x75(%rax)
   8:	5c                   	pop    %rsp
   9:	24 58                	and    $0x58,%al
   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 b8 56 78 00       	call   0x7856d9
  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
[   10.749532][  T227] RSP: 0018:ffffc90000b17520 EFLAGS: 00010246
[   10.749836][  T227] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.750179][  T227] RDX: 0000000000000000 RSI: ffff88800b1f2c98 RDI: ffff8880089550f8
[   10.750518][  T227] RBP: ffffffffb1924440 R08: 0000000000000000 R09: fffffbfff5efd844
[   10.750859][  T227] R10: ffffffffaf7ec227 R11: ffff8880089545c0 R12: 0000000000000000
[   10.751199][  T227] R13: ffff88800b1f2128 R14: ffff88800b1f2008 R15: ffff88800b1f2000
[   10.751592][  T227] FS:  00007fdb77f3c740(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   10.751987][  T227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.752288][  T227] CR2: 00007fdb77f3b258 CR3: 0000000008e8c006 CR4: 0000000000772ef0
[   10.752632][  T227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.752971][  T227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.753317][  T227] PKRU: 55555554
[   10.753507][  T227] Call Trace:
[   10.753699][  T227]  <TASK>
[ 10.753831][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 10.754070][ T227] ? __warn (kernel/panic.c:748) 
[ 10.754275][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 10.754521][ T227] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.754767][ T227] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.754949][ T227] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.755187][ T227] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.755439][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 10.755680][ T227] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 10.755971][ 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) 
[ 10.756226][ T227] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.756466][ T227] register_netdevice (net/core/dev.c:11033) 
[ 10.756710][ T227] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 10.756958][ T227] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.757227][ T227] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.757526][ T227] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 10.757709][ T227] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.758005][ T227] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.758306][ T227] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 10.758596][ T227] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 10.758838][ T227] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 10.759133][ T227] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 10.759383][ 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)) 
[ 10.759557][ T227] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 10.759793][ T227] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 10.760029][ T227] __driver_probe_device (drivers/base/dd.c:800) 
[ 10.760266][ T227] driver_probe_device (drivers/base/dd.c:830) 
[ 10.760496][ T227] __device_attach_driver (drivers/base/dd.c:959) 
[ 10.760727][ T227] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 10.761019][ T227] bus_for_each_drv (drivers/base/bus.c:462) 
[ 10.761265][ T227] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 10.761496][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.761735][ T227] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.761976][ T227] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 10.762236][ T227] __device_attach (drivers/base/dd.c:1030) 
[ 10.762485][ T227] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 10.762729][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.762964][ 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) 
[ 10.763213][ T227] bus_probe_device (drivers/base/bus.c:537) 
[ 10.763457][ T227] device_add (drivers/base/core.c:3672) 
[ 10.763689][ T227] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 10.763917][ T227] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 10.764170][ T227] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 10.764481][ T227] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 10.764793][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.765023][ T227] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 10.765267][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.765508][ T227] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 10.765745][ T227] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 10.765933][ T227] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 10.766187][ T227] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.766419][ 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) 
[ 10.766662][ T227] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.766901][ T227] ksys_write (fs/read_write.c:731) 
[ 10.767085][ T227] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 10.767325][ T227] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.767570][ T227] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.767810][ T227] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.768091][  T227] RIP: 0033:0x7fdb7807db77
[ 10.768346][ 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
[   10.769101][  T227] RSP: 002b:00007ffc1fda7788 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   10.769458][  T227] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fdb7807db77
[   10.769794][  T227] RDX: 0000000000000007 RSI: 000055dfda7ca4c0 RDI: 0000000000000001
[   10.770140][  T227] RBP: 000055dfda7ca4c0 R08: 0000000000000003 R09: 0000000000000077
[   10.770473][  T227] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   10.770815][  T227] R13: 00007fdb78139760 R14: 0000000000000007 R15: 00007fdb781349c0
| [   11.120854][  T255] ------------[ cut here ]------------
| [ 11.121299][ T255] WARNING: CPU: 2 PID: 255 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:10596) 
| [   11.121720][  T255] Modules linked in: netdevsim
| [   11.122459][  T255] Tainted: [W]=WARN
[   11.122667][  T255] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.122921][ T255] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.123214][ T255] Code: 00 e8 b3 48 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 b8 56 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:	b3 48                	mov    $0x48,%bl
   4:	fe                   	(bad)
   5:	ff 48 8b             	decl   -0x75(%rax)
   8:	5c                   	pop    %rsp
   9:	24 58                	and    $0x58,%al
   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 b8 56 78 00       	call   0x7856d9
  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
[   11.123911][  T255] RSP: 0018:ffffc90000b571e8 EFLAGS: 00010246
[   11.124183][  T255] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.124489][  T255] RDX: 0000000000000000 RSI: ffff88800de8ac98 RDI: ffff888008948b00
[   11.124808][  T255] RBP: ffff88800b348040 R08: 0000000000000000 R09: fffffbfff5efd844
[   11.125105][  T255] R10: ffffffffaf7ec227 R11: ffff888008948040 R12: 0000000000000000
[   11.125411][  T255] R13: ffff88800de8a128 R14: ffff88800de8a008 R15: ffff88800de8a000
[   11.125708][  T255] FS:  00007f9522685800(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   11.126054][  T255] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.126329][  T255] CR2: 00007f95227c4440 CR3: 0000000002680005 CR4: 0000000000772ef0
[   11.126632][  T255] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.126926][  T255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.127235][  T255] PKRU: 55555554
[   11.127396][  T255] Call Trace:
[   11.127561][  T255]  <TASK>
[ 11.127683][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.127893][ T255] ? __warn (kernel/panic.c:748) 
[ 11.128075][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.128297][ T255] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.128520][ T255] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.128682][ T255] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.128887][ T255] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.129116][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.129331][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 11.129546][ T255] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 11.129800][ T255] ? _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) 
[ 11.130019][ T255] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.130244][ T255] register_netdevice (net/core/dev.c:11033) 
[ 11.130464][ T255] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 11.130680][ T255] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.130902][ T255] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.131170][ T255] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.131435][ T255] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.131695][ T255] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.131960][ T255] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.132228][ T255] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.132511][ T255] devlink_reload (net/devlink/dev.c:474) 
[ 11.132725][ T255] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.132929][ T255] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.133149][ T255] ? cap_capable (security/commoncap.c:131) 
[ 11.133367][ T255] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 11.133539][ T255] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.133754][ T255] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.134006][ T255] ? __nla_parse (lib/nlattr.c:732) 
[ 11.134238][ T255] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.134449][ T255] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.134730][ T255] ? cap_capable (security/commoncap.c:131) 
[ 11.134936][ T255] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.135165][ T255] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.135381][ T255] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.135586][ T255] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.135836][ T255] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.136081][ T255] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.136355][ T255] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.136575][ T255] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.136779][ T255] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.136989][ T255] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.137222][ T255] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.137383][ T255] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.137596][ T255] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.137808][ T255] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.137972][ T255] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.138193][ T255] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.138406][ T255] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.138622][ T255] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.138840][ T255] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.139043][ T255] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.139263][ T255] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.139482][ T255] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.139699][ T255] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.139906][ T255] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.140114][ T255] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.140346][ T255] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.140559][ T255] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.140813][ T255] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.141029][ T255] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.141303][ T255] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.141520][ T255] __x64_sys_sendto (net/socket.c:2181) 
[ 11.141726][ T255] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.141977][ T255] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.142200][ T255] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.142452][  T255] RIP: 0033:0x7f9522891a4a
[ 11.142674][ T255] 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
[   11.143376][  T255] RSP: 002b:00007ffe25614a68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.143682][  T255] RAX: ffffffffffffffda RBX: 000000003b37db00 RCX: 00007f9522891a4a
[   11.143989][  T255] RDX: 0000000000000040 RSI: 000000003b37db00 RDI: 0000000000000005
[   11.144306][  T255] RBP: 000000003b37d910 R08: 00007f9522a35200 R09: 000000000000000c
[   11.144614][  T255] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.144917][  T255] R13: 000000003b37d910 R14: 0000000000000000 R15: 0000000000000001
| [   37.657817][   T11] ------------[ cut here ]------------
| [ 37.658182][ 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:10596) 
| [   37.658544][   T11] Modules linked in: netdevsim
| [   37.659071][   T11] Tainted: [W]=WARN
[   37.659218][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   37.659438][   T11] Workqueue: netns cleanup_net
[ 37.659649][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 37.659876][ T11] Code: 00 e8 b3 48 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 b8 56 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:	b3 48                	mov    $0x48,%bl
   4:	fe                   	(bad)
   5:	ff 48 8b             	decl   -0x75(%rax)
   8:	5c                   	pop    %rsp
   9:	24 58                	and    $0x58,%al
   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 b8 56 78 00       	call   0x7856d9
  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
[   37.660482][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   37.660710][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   37.660967][   T11] RDX: 0000000000000000 RSI: ffff88800b382c98 RDI: ffff888001a82e10
[   37.661242][   T11] RBP: ffffffffb1924440 R08: 0000000000000000 R09: fffffbfff5efd844
[   37.661499][   T11] R10: ffffffffaf7ec227 R11: ffff888001a82300 R12: 0000000000000000
[   37.661759][   T11] R13: ffff88800b382128 R14: ffff88800b382008 R15: ffff88800b382000
[   37.662017][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   37.662607][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.662828][   T11] CR2: 000055dfda7ca4c0 CR3: 0000000008e8c003 CR4: 0000000000772ef0
[   37.663088][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.663378][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.663639][   T11] PKRU: 55555554
[   37.663775][   T11] Call Trace:
[   37.663910][   T11]  <TASK>
[ 37.664004][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 37.664200][ T11] ? __warn (kernel/panic.c:748) 
[ 37.664343][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 37.664535][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 37.664727][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 37.664864][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 37.665046][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 37.665248][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 37.665444][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 37.665671][ 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) 
[ 37.665861][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 37.666045][ T11] register_netdevice (net/core/dev.c:11033) 
[ 37.666242][ T11] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 37.666432][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 37.666627][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 37.666859][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 37.667097][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 37.667341][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 37.667575][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 37.667800][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 37.668038][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 37.668234][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 37.668414][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 37.668607][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 37.668794][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 37.669023][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 37.669211][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 37.669397][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 37.669576][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 37.669766][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 37.669944][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 37.670149][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 37.670334][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 37.670509][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 37.670693][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 37.670874][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 37.671060][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 37.671248][ T11] kthread (kernel/kthread.c:464) 
[ 37.671391][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.671573][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.671752][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 37.671931][ 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