======================================
| 0
| xx__-> [    9.839967][  T227] ------------[ cut here ]------------
| [ 9.840323][ T227] WARNING: CPU: 3 PID: 227 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [    9.840829][  T227] Modules linked in: netdevsim
[    9.841445][  T227] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.841710][ T227] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.841983][ T227] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 00 85 c0 0f 85 99 00 00 00 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 20 48 c1 ea 03
All code
========
   0:	00 e8                	add    %ch,%al
   2:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 99 00 00 00    	jne    0xc2
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  12:	48 c1 ea 03          	shr    $0x3,%rdx
[    9.842753][  T227] RSP: 0018:ffffc90000aa7520 EFLAGS: 00010246
[    9.843025][  T227] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.843355][  T227] RDX: 0000000000000000 RSI: ffff88800b422c98 RDI: ffff88800a7e8b78
[    9.843670][  T227] RBP: ffffffff98b23440 R08: 0000000000000000 R09: fffffbfff2d3d83c
[    9.843985][  T227] R10: ffffffff969ec1e7 R11: ffff88800a7e8040 R12: 0000000000000000
[    9.844309][  T227] R13: ffff88800b422128 R14: ffff88800b422008 R15: ffff88800b422000
[    9.844629][  T227] FS:  00007f74bcfd9740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[    9.844996][  T227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.845271][  T227] CR2: 000055dd622a0598 CR3: 0000000009390004 CR4: 0000000000772ef0
[    9.845591][  T227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.845904][  T227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.846239][  T227] PKRU: 55555554
[    9.846405][  T227] Call Trace:
[    9.846575][  T227]  <TASK>
[ 9.846687][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.846930][ T227] ? __warn (kernel/panic.c:748) 
[ 9.847097][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.847321][ T227] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.847538][ T227] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.847701][ T227] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.847912][ T227] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.848137][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.848376][ T227] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.848646][ 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) 
[ 9.848863][ T227] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.849082][ T227] register_netdevice (net/core/dev.c:11003) 
[ 9.849314][ T227] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.849543][ T227] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.849770][ T227] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.850043][ T227] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 9.850216][ T227] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.850495][ T227] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.850769][ T227] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 9.851044][ T227] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 9.851279][ T227] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 9.851546][ T227] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 9.851762][ 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)) 
[ 9.851922][ T227] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 9.852156][ T227] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 9.852380][ T227] __driver_probe_device (drivers/base/dd.c:800) 
[ 9.852597][ T227] driver_probe_device (drivers/base/dd.c:830) 
[ 9.852807][ T227] __device_attach_driver (drivers/base/dd.c:959) 
[ 9.853025][ T227] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 9.853297][ T227] bus_for_each_drv (drivers/base/bus.c:462) 
[ 9.853513][ T227] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 9.853720][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.853938][ T227] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.854163][ T227] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 9.854389][ T227] __device_attach (drivers/base/dd.c:1030) 
[ 9.854609][ T227] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 9.854819][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.855031][ 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) 
[ 9.855258][ T227] bus_probe_device (drivers/base/bus.c:537) 
[ 9.855481][ T227] device_add (drivers/base/core.c:3672) 
[ 9.855702][ T227] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 9.855912][ T227] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 9.856135][ T227] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 9.856418][ T227] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 9.856692][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.856905][ T227] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 9.857127][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.857360][ T227] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 9.857582][ T227] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 9.857752][ T227] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 9.857969][ T227] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 9.858193][ 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) 
[ 9.858434][ T227] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 9.858659][ T227] ksys_write (fs/read_write.c:731) 
[ 9.858827][ T227] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 9.859036][ T227] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 9.859277][ T227] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.859492][ T227] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.859751][  T227] RIP: 0033:0x7f74bd11ab77
[ 9.860067][ 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
[    9.861339][  T227] RSP: 002b:00007ffc45fa02c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[    9.861764][  T227] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f74bd11ab77
[    9.862080][  T227] RDX: 0000000000000007 RSI: 000055dd6229f590 RDI: 0000000000000001
[    9.862407][  T227] RBP: 000055dd6229f590 R08: 0000000000000003 R09: 0000000000000077
[    9.862735][  T227] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[    9.863048][  T227] R13: 00007f74bd1d6760 R14: 0000000000000007 R15: 00007f74bd1d19c0
| [   10.102136][  T247] ------------[ cut here ]------------
| [ 10.102475][ T247] WARNING: CPU: 2 PID: 247 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) 
| [   10.102956][  T247] Modules linked in: netdevsim
| [   10.103532][  T247] Tainted: [W]=WARN
[   10.103708][  T247] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.103959][ T247] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.104263][ T247] 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
[   10.104938][  T247] RSP: 0018:ffffc90000b271e8 EFLAGS: 00010246
[   10.105203][  T247] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.105503][  T247] RDX: 0000000000000000 RSI: ffff88800267ac98 RDI: ffff888004c25080
[   10.105802][  T247] RBP: ffff888008b18040 R08: 0000000000000000 R09: fffffbfff2d3d83c
[   10.106095][  T247] R10: ffffffff969ec1e7 R11: ffff888004c245c0 R12: 0000000000000000
[   10.106405][  T247] R13: ffff88800267a128 R14: ffff88800267a008 R15: ffff88800267a000
[   10.106713][  T247] FS:  00007fc387866800(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   10.107059][  T247] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.107342][  T247] CR2: 00007f6712f12210 CR3: 0000000009386002 CR4: 0000000000772ef0
[   10.107636][  T247] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.107929][  T247] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.108227][  T247] PKRU: 55555554
[   10.108393][  T247] Call Trace:
[   10.108550][  T247]  <TASK>
[ 10.108678][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.108907][ T247] ? __warn (kernel/panic.c:748) 
[ 10.109067][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.109283][ T247] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.109491][ T247] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.109658][ T247] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.109859][ T247] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.110076][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.110298][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.110507][ T247] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.110761][ T247] ? _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) 
[ 10.110971][ T247] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.111197][ T247] register_netdevice (net/core/dev.c:11003) 
[ 10.111404][ T247] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.111618][ T247] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.111835][ T247] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.112137][ T247] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.112413][ T247] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 10.112679][ T247] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 10.112934][ T247] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 10.113198][ T247] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 10.113460][ T247] devlink_reload (net/devlink/dev.c:474) 
[ 10.113668][ T247] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 10.113871][ T247] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 10.114084][ T247] ? cap_capable (security/commoncap.c:131) 
[ 10.114293][ T247] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 10.114462][ T247] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 10.114667][ T247] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.114919][ T247] ? __nla_parse (lib/nlattr.c:732) 
[ 10.115128][ T247] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 10.115343][ T247] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 10.115609][ T247] ? cap_capable (security/commoncap.c:131) 
[ 10.115809][ T247] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 10.116016][ T247] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 10.116233][ T247] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 10.116440][ T247] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 10.116685][ T247] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.116929][ T247] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 10.117212][ T247] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 10.117420][ T247] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 10.117626][ T247] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 10.117831][ T247] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 10.118047][ T247] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 10.118215][ T247] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 10.118430][ T247] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 10.118642][ T247] genl_rcv (net/netlink/genetlink.c:1220) 
[ 10.118802][ T247] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 10.119010][ T247] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 10.119223][ T247] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 10.119436][ T247] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 10.119642][ T247] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.119844][ T247] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 10.120048][ T247] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 10.120273][ T247] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 10.120487][ T247] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 10.120690][ T247] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.120891][ T247] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 10.121103][ T247] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.121318][ T247] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 10.121565][ T247] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.121776][ T247] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 10.122026][ T247] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 10.122246][ T247] __x64_sys_sendto (net/socket.c:2181) 
[ 10.122446][ T247] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.122697][ T247] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.122902][ T247] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.123160][  T247] RIP: 0033:0x7fc387a72a4a
[ 10.123375][ T247] 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
[   10.124053][  T247] RSP: 002b:00007ffd235a1d78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   10.124360][  T247] RAX: ffffffffffffffda RBX: 00000000062b0b00 RCX: 00007fc387a72a4a
[   10.124657][  T247] RDX: 0000000000000040 RSI: 00000000062b0b00 RDI: 0000000000000005
[   10.124948][  T247] RBP: 00000000062b0910 R08: 00007fc387c16200 R09: 000000000000000c
[   10.125337][  T247] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   10.125629][  T247] R13: 00000000062b0910 R14: 0000000000000000 R15: 0000000000000001
| [   79.424593][   T11] ------------[ cut here ]------------
| [ 79.424908][ T11] WARNING: CPU: 2 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:10566) 
| [   79.425294][   T11] Modules linked in: netdevsim
| [   79.425886][   T11] Tainted: [W]=WARN
[   79.426031][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   79.426266][   T11] Workqueue: netns cleanup_net
[ 79.426493][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.426811][ T11] 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
[   79.427438][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   79.427673][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   79.427948][   T11] RDX: 0000000000000000 RSI: ffff88800264ac98 RDI: ffff888001a82e10
[   79.428241][   T11] RBP: ffffffff98b23440 R08: 0000000000000000 R09: fffffbfff2d3d83c
[   79.428529][   T11] R10: ffffffff969ec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   79.428793][   T11] R13: ffff88800264a128 R14: ffff88800264a008 R15: ffff88800264a000
[   79.429056][   T11] FS:  0000000000000000(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   79.429459][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   79.429751][   T11] CR2: 00000000004060bb CR3: 000000001bf28005 CR4: 0000000000772ef0
[   79.430082][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   79.430436][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   79.430794][   T11] PKRU: 55555554
[   79.430995][   T11] Call Trace:
[   79.431138][   T11]  <TASK>
[ 79.431252][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.431459][ T11] ? __warn (kernel/panic.c:748) 
[ 79.431611][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.431798][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 79.431986][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 79.432130][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 79.432335][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 79.432538][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 79.432736][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 79.432966][ 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) 
[ 79.433170][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 79.433362][ T11] register_netdevice (net/core/dev.c:11003) 
[ 79.433552][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 79.433746][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 79.433950][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 79.434197][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 79.434443][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 79.434679][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 79.434949][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 79.435197][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 79.435437][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 79.435626][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 79.435812][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 79.436004][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 79.436206][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 79.436453][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 79.436640][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 79.436824][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 79.437007][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 79.437205][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 79.437389][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 79.437578][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 79.437775][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 79.437968][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 79.438178][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 79.438366][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 79.438563][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 79.438774][ T11] kthread (kernel/kthread.c:464) 
[ 79.438925][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 79.439115][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 79.439309][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 79.439492][ 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