======================================
| 0
| xx__-> [   11.395290][  T228] ------------[ cut here ]------------
| [ 11.395725][ 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:10596) 
| [   11.396324][  T228] Modules linked in: netdevsim
[   11.397157][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.397525][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.397862][ T228] 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
[   11.398661][  T228] RSP: 0018:ffffc90000a77520 EFLAGS: 00010246
[   11.398947][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.399333][  T228] RDX: 0000000000000000 RSI: ffff888002062c98 RDI: ffff8880097a8b78
[   11.399682][  T228] RBP: ffffffff95d24440 R08: 0000000000000000 R09: fffffbfff277d844
[   11.400030][  T228] R10: ffffffff93bec227 R11: ffff8880097a8040 R12: 0000000000000000
[   11.400403][  T228] R13: ffff888002062128 R14: ffff888002062008 R15: ffff888002062000
[   11.400762][  T228] FS:  00007f669ebe8740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   11.401126][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.401400][  T228] CR2: 000055f1e36e0598 CR3: 000000000b7a2002 CR4: 0000000000772ef0
[   11.401783][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.402103][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.402436][  T228] PKRU: 55555554
[   11.402611][  T228] Call Trace:
[   11.402788][  T228]  <TASK>
[ 11.402937][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.403178][ T228] ? __warn (kernel/panic.c:748) 
[ 11.403403][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.403615][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.403839][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.404008][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.404228][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.404458][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.404691][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 11.404973][ 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) 
[ 11.405251][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.405491][ T228] register_netdevice (net/core/dev.c:11033) 
[ 11.405765][ T228] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 11.406008][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.406269][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.406555][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 11.406730][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.407058][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.407321][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 11.407616][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 11.407877][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 11.408156][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 11.408406][ 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)) 
[ 11.408581][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 11.408825][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 11.409059][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 11.409280][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 11.409557][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 11.409778][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 11.410075][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 11.410343][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 11.410557][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.410770][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.410994][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 11.411226][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 11.411463][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 11.411714][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.411950][ 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) 
[ 11.412177][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 11.412415][ T228] device_add (drivers/base/core.c:3672) 
[ 11.412652][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 11.412865][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 11.413114][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 11.413433][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 11.413739][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.413958][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 11.414171][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.414401][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 11.414652][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 11.414820][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 11.415072][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 11.415304][ 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) 
[ 11.415581][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 11.415865][ T228] ksys_write (fs/read_write.c:731) 
[ 11.416064][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 11.416298][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 11.416567][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.416791][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.417075][  T228] RIP: 0033:0x7f669ed29b77
[ 11.417312][ 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
[   11.418098][  T228] RSP: 002b:00007ffe29cddd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   11.418472][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f669ed29b77
[   11.418825][  T228] RDX: 0000000000000007 RSI: 000055f1e36df590 RDI: 0000000000000001
[   11.419156][  T228] RBP: 000055f1e36df590 R08: 0000000000000003 R09: 0000000000000077
[   11.419540][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   11.419921][  T228] R13: 00007f669ede5760 R14: 0000000000000007 R15: 00007f669ede09c0
| [   11.745898][  T248] ------------[ cut here ]------------
| [ 11.746286][ T248] WARNING: CPU: 0 PID: 248 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) 
| [   11.746932][  T248] Modules linked in: netdevsim
| [   11.747815][  T248] Tainted: [W]=WARN
[   11.748074][  T248] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.748472][ T248] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.748870][ T248] 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
[   11.749727][  T248] RSP: 0018:ffffc900006f71e8 EFLAGS: 00010246
[   11.749985][  T248] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.750274][  T248] RDX: 0000000000000000 RSI: ffff888009912c98 RDI: ffff88800a552dc0
[   11.750680][  T248] RBP: ffff8880025e0040 R08: 0000000000000000 R09: fffffbfff277d844
[   11.751030][  T248] R10: ffffffff93bec227 R11: ffff88800a552300 R12: 0000000000000000
[   11.751429][  T248] R13: ffff888009912128 R14: ffff888009912008 R15: ffff888009912000
[   11.751846][  T248] FS:  00007ffa0f763800(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   11.752327][  T248] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.752715][  T248] CR2: 00007ffa0f8a2440 CR3: 0000000008cc4005 CR4: 0000000000772ef0
[   11.753158][  T248] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.753488][  T248] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.753799][  T248] PKRU: 55555554
[   11.754002][  T248] Call Trace:
[   11.754212][  T248]  <TASK>
[ 11.754324][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.754622][ T248] ? __warn (kernel/panic.c:748) 
[ 11.754863][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.755163][ T248] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.755439][ T248] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.755604][ T248] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.755904][ T248] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.756113][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 11.756365][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 11.756583][ T248] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 11.756842][ T248] ? _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) 
[ 11.757047][ T248] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.757241][ T248] register_netdevice (net/core/dev.c:11033) 
[ 11.757532][ T248] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 11.757801][ T248] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.758105][ T248] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.758539][ T248] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.758942][ T248] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.759253][ T248] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.759521][ T248] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.759867][ T248] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.760154][ T248] devlink_reload (net/devlink/dev.c:474) 
[ 11.760367][ T248] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.760641][ T248] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.760903][ T248] ? cap_capable (security/commoncap.c:131) 
[ 11.761147][ T248] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 11.761391][ T248] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.761715][ T248] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.762119][ T248] ? __nla_parse (lib/nlattr.c:732) 
[ 11.762323][ T248] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.762532][ T248] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.762869][ T248] ? cap_capable (security/commoncap.c:131) 
[ 11.763063][ T248] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.763264][ T248] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.763481][ T248] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.763794][ T248] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.764069][ T248] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.764332][ T248] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.764618][ T248] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.764855][ T248] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.765138][ T248] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.765424][ T248] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.765746][ T248] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.766020][ T248] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.766270][ T248] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.766538][ T248] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.766730][ T248] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.766942][ T248] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.767155][ T248] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.767436][ T248] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.767743][ T248] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.767988][ T248] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.768262][ T248] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.768501][ T248] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.768766][ T248] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.768976][ T248] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.769181][ T248] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.769411][ T248] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.769702][ T248] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.769955][ T248] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.770220][ T248] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.770555][ T248] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.770818][ T248] __x64_sys_sendto (net/socket.c:2181) 
[ 11.771101][ T248] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.771360][ T248] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.771574][ T248] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.771960][  T248] RIP: 0033:0x7ffa0f96fa4a
[ 11.772159][ T248] 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
[   11.772910][  T248] RSP: 002b:00007ffd8ff9a278 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.773203][  T248] RAX: ffffffffffffffda RBX: 0000000030fe6b00 RCX: 00007ffa0f96fa4a
[   11.773494][  T248] RDX: 0000000000000040 RSI: 0000000030fe6b00 RDI: 0000000000000005
[   11.773853][  T248] RBP: 0000000030fe6910 R08: 00007ffa0fb13200 R09: 000000000000000c
[   11.774169][  T248] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.774491][  T248] R13: 0000000030fe6910 R14: 0000000000000000 R15: 0000000000000001
| [   83.982083][   T67] ------------[ cut here ]------------
| [ 83.982411][ T67] WARNING: CPU: 3 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:10596) 
| [   83.982788][   T67] Modules linked in: netdevsim
| [   83.983390][   T67] Tainted: [W]=WARN
[   83.983541][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   83.983772][   T67] Workqueue: netns cleanup_net
[ 83.983991][ T67] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 83.984232][ T67] 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
[   83.984897][   T67] RSP: 0018:ffffc90000487620 EFLAGS: 00010246
[   83.985137][   T67] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   83.985424][   T67] RDX: 0000000000000000 RSI: ffff88800bbfac98 RDI: ffff888008c30b50
[   83.985718][   T67] RBP: ffffffff95d24440 R08: 0000000000000000 R09: fffffbfff277d844
[   83.985996][   T67] R10: ffffffff93bec227 R11: ffff888008c30040 R12: 0000000000000000
[   83.986267][   T67] R13: ffff88800bbfa128 R14: ffff88800bbfa008 R15: ffff88800bbfa000
[   83.986575][   T67] FS:  0000000000000000(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   83.986907][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.987151][   T67] CR2: 00007fb79b5a5800 CR3: 0000000016f28005 CR4: 0000000000772ef0
[   83.987638][   T67] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.987928][   T67] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.988210][   T67] PKRU: 55555554
[   83.988352][   T67] Call Trace:
[   83.988523][   T67]  <TASK>
[ 83.988621][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 83.988812][ T67] ? __warn (kernel/panic.c:748) 
[ 83.988961][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 83.989153][ T67] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 83.989349][ T67] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 83.989517][ T67] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 83.989710][ T67] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 83.989934][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 83.990144][ T67] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 83.990411][ 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) 
[ 83.990623][ T67] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 83.990829][ T67] register_netdevice (net/core/dev.c:11033) 
[ 83.991033][ T67] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 83.991246][ T67] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 83.991483][ T67] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 83.991756][ T67] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 83.992022][ T67] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 83.992330][ T67] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 83.992599][ T67] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 83.992863][ T67] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 83.993094][ T67] devlink_reload (net/devlink/dev.c:474) 
[ 83.993291][ T67] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 83.993479][ T67] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 83.993662][ T67] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 83.993840][ T67] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 83.994080][ T67] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 83.994271][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 83.994476][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 83.994659][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 83.994855][ T67] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 83.995023][ T67] ? process_one_work (kernel/workqueue.c:3214) 
[ 83.995257][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 83.995477][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 83.995678][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 83.995889][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 83.996091][ T67] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 83.996274][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 83.996522][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 83.996706][ T67] kthread (kernel/kthread.c:464) 
[ 83.996848][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 83.997024][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 83.997215][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 83.997400][ 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