======================================
| 0
| xx__-> [    9.795344][  T228] ------------[ cut here ]------------
| [ 9.795675][ T228] WARNING: CPU: 1 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) 
| [    9.796116][  T228] Modules linked in: netdevsim
[    9.796814][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.797074][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.797373][ 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
[    9.798107][  T228] RSP: 0018:ffffc90000b17520 EFLAGS: 00010246
[    9.798374][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.798685][  T228] RDX: 0000000000000000 RSI: ffff88800bedac98 RDI: ffff8880052c50f8
[    9.799003][  T228] RBP: ffffffffbc723440 R08: 0000000000000000 R09: fffffbfff74bd83c
[    9.799326][  T228] R10: ffffffffba5ec1e7 R11: ffff8880052c45c0 R12: 0000000000000000
[    9.799671][  T228] R13: ffff88800beda128 R14: ffff88800beda008 R15: ffff88800beda000
[    9.799984][  T228] FS:  00007fb24e69b740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[    9.800357][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.800622][  T228] CR2: 00007f8e1ac93aa0 CR3: 00000000026e8004 CR4: 0000000000772ef0
[    9.800939][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.801273][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.801584][  T228] PKRU: 55555554
[    9.801746][  T228] Call Trace:
[    9.801905][  T228]  <TASK>
[ 9.802020][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.802330][ T228] ? __warn (kernel/panic.c:748) 
[ 9.802499][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.802710][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.802924][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.803177][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.803387][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.803625][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.803849][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.804120][ 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) 
[ 9.804338][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.804552][ T228] register_netdevice (net/core/dev.c:11003) 
[ 9.804771][ T228] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.804995][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.805244][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.805519][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 9.805679][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.805950][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.806226][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 9.806496][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 9.806715][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 9.806977][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 9.807204][ 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)) 
[ 9.807363][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 9.807579][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 9.807792][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 9.808002][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 9.808219][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 9.808429][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 9.808688][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 9.808923][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 9.809168][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.809378][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.809586][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 9.809799][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 9.810004][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 9.810222][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.810429][ 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) 
[ 9.810646][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 9.810855][ T228] device_add (drivers/base/core.c:3672) 
[ 9.811065][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 9.811280][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 9.811498][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 9.811769][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 9.812040][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.812259][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 9.812472][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.812680][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 9.812897][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 9.813061][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 9.813301][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 9.813520][ 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) 
[ 9.813739][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 9.813954][ T228] ksys_write (fs/read_write.c:731) 
[ 9.814128][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 9.814334][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 9.814550][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.814765][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.815022][  T228] RIP: 0033:0x7fb24e7dcb77
[ 9.815250][ 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
[    9.815974][  T228] RSP: 002b:00007ffd71b6d068 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[    9.816312][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fb24e7dcb77
[    9.816628][  T228] RDX: 0000000000000007 RSI: 0000564c769ab590 RDI: 0000000000000001
[    9.816937][  T228] RBP: 0000564c769ab590 R08: 0000000000000003 R09: 0000000000000077
[    9.817274][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[    9.817602][  T228] R13: 00007fb24e898760 R14: 0000000000000007 R15: 00007fb24e8939c0
| [   10.082354][  T249] ------------[ cut here ]------------
| [ 10.082643][ T249] WARNING: CPU: 0 PID: 249 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) 
| [   10.083042][  T249] Modules linked in: netdevsim
| [   10.083693][  T249] Tainted: [W]=WARN
[   10.083862][  T249] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.084114][ T249] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.084363][ T249] 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
[   10.085037][  T249] RSP: 0018:ffffc900004e71e8 EFLAGS: 00010246
[   10.085292][  T249] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.085580][  T249] RDX: 0000000000000000 RSI: ffff88800be72c98 RDI: ffff888002552dc0
[   10.085874][  T249] RBP: ffff88800a540040 R08: 0000000000000000 R09: fffffbfff74bd83c
[   10.086184][  T249] R10: ffffffffba5ec1e7 R11: ffff888002552300 R12: 0000000000000000
[   10.086480][  T249] R13: ffff88800be72128 R14: ffff88800be72008 R15: ffff88800be72000
[   10.086765][  T249] FS:  00007f064f7c6800(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   10.087107][  T249] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.087356][  T249] CR2: 00007f064f9d2a30 CR3: 000000000bab0006 CR4: 0000000000772ef0
[   10.087640][  T249] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.087938][  T249] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.088231][  T249] PKRU: 55555554
[   10.088376][  T249] Call Trace:
[   10.088522][  T249]  <TASK>
[ 10.088621][ T249] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.088816][ T249] ? __warn (kernel/panic.c:748) 
[ 10.088969][ T249] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.089240][ T249] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.089466][ T249] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.089615][ T249] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.089806][ T249] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.090010][ T249] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.090221][ T249] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.090426][ T249] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.090681][ T249] ? _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) 
[ 10.090882][ T249] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.091093][ T249] register_netdevice (net/core/dev.c:11003) 
[ 10.091294][ T249] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.091496][ T249] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.091706][ T249] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.091961][ T249] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.092227][ T249] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 10.092485][ T249] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 10.092736][ T249] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 10.092982][ T249] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 10.093245][ T249] devlink_reload (net/devlink/dev.c:474) 
[ 10.093443][ T249] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 10.093653][ T249] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 10.093857][ T249] ? cap_capable (security/commoncap.c:131) 
[ 10.094046][ T249] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 10.094208][ T249] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 10.094407][ T249] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.094647][ T249] ? __nla_parse (lib/nlattr.c:732) 
[ 10.094848][ T249] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 10.095044][ T249] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 10.095309][ T249] ? cap_capable (security/commoncap.c:131) 
[ 10.095502][ T249] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 10.095701][ T249] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 10.095896][ T249] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 10.096100][ T249] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 10.096337][ T249] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.096578][ T249] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 10.096835][ T249] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 10.097034][ T249] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 10.097235][ T249] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 10.097435][ T249] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 10.097646][ T249] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 10.097794][ T249] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 10.097991][ T249] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 10.098205][ T249] genl_rcv (net/netlink/genetlink.c:1220) 
[ 10.098353][ T249] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 10.098548][ T249] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 10.098743][ T249] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 10.098947][ T249] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 10.099157][ T249] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.099352][ T249] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.099561][ T249] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 10.099761][ T249] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 10.099968][ T249] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.100171][ T249] ? 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) 
[ 10.100369][ T249] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.100566][ T249] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.100762][ T249] ? 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) 
[ 10.100962][ T249] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.101168][ T249] __x64_sys_sendto (net/socket.c:2181) 
[ 10.101362][ T249] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.101600][ T249] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.101796][ T249] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.102034][  T249] RIP: 0033:0x7f064f9d2a4a
[ 10.102244][ T249] Code: Unable to access opcode bytes at 0x7f064f9d2a20.

Code starting with the faulting instruction
===========================================
[   10.102498][  T249] RSP: 002b:00007ffdd6837598 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   10.102789][  T249] RAX: ffffffffffffffda RBX: 000000000965cb00 RCX: 00007f064f9d2a4a
[   10.103071][  T249] RDX: 0000000000000040 RSI: 000000000965cb00 RDI: 0000000000000005
[   10.103368][  T249] RBP: 000000000965c910 R08: 00007f064fb76200 R09: 000000000000000c
[   10.103662][  T249] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   10.103947][  T249] R13: 000000000965c910 R14: 0000000000000000 R15: 0000000000000001
| [   79.440608][   T67] ------------[ cut here ]------------
| [ 79.440877][ T67] WARNING: CPU: 0 PID: 67 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) 
| [   79.441247][   T67] Modules linked in: netdevsim
| [   79.441785][   T67] Tainted: [W]=WARN
[   79.441913][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   79.442142][   T67] Workqueue: netns cleanup_net
[ 79.442347][ T67] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.442563][ T67] 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
[   79.443168][   T67] RSP: 0018:ffffc90000487620 EFLAGS: 00010246
[   79.443386][   T67] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   79.443642][   T67] RDX: 0000000000000000 RSI: ffff88800bea2c98 RDI: ffff888008ee0b50
[   79.443890][   T67] RBP: ffffffffbc723440 R08: 0000000000000000 R09: fffffbfff74bd83c
[   79.444147][   T67] R10: ffffffffba5ec1e7 R11: ffff888008ee0040 R12: 0000000000000000
[   79.444397][   T67] R13: ffff88800bea2128 R14: ffff88800bea2008 R15: ffff88800bea2000
[   79.444643][   T67] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   79.444933][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   79.445180][   T67] CR2: 00007f85ba150000 CR3: 0000000017928003 CR4: 0000000000772ef0
[   79.445522][   T67] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   79.445772][   T67] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   79.446026][   T67] PKRU: 55555554
[   79.446166][   T67] Call Trace:
[   79.446295][   T67]  <TASK>
[ 79.446382][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.446554][ T67] ? __warn (kernel/panic.c:748) 
[ 79.446684][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.446855][ T67] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 79.447034][ T67] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 79.447174][ T67] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 79.447343][ T67] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 79.447525][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.447706][ T67] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 79.447922][ T67] ? _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) 
[ 79.448106][ T67] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 79.448281][ T67] register_netdevice (net/core/dev.c:11003) 
[ 79.448458][ T67] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 79.448639][ T67] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 79.448828][ T67] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 79.449051][ T67] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 79.449288][ T67] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 79.449514][ T67] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 79.449733][ T67] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 79.449949][ T67] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 79.450231][ T67] devlink_reload (net/devlink/dev.c:474) 
[ 79.450415][ T67] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 79.450589][ T67] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 79.450774][ T67] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 79.450945][ T67] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 79.451181][ T67] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 79.451355][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 79.451532][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 79.451699][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 79.451874][ T67] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 79.452042][ T67] ? process_one_work (kernel/workqueue.c:3214) 
[ 79.452233][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 79.452416][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 79.452586][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 79.452771][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 79.452946][ T67] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 79.453136][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 79.453368][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 79.453544][ T67] kthread (kernel/kthread.c:464) 
[ 79.453677][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 79.453854][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 79.454030][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 79.454239][ T67] ? __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