======================================
| 0
| xx__-> [    9.641906][  T228] ------------[ cut here ]------------
| [ 9.642258][ T228] WARNING: CPU: 0 PID: 228 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [    9.642672][  T228] Modules linked in: netdevsim
[    9.643348][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.643616][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.643883][ 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
[    9.644614][  T228] RSP: 0018:ffffc90000af7520 EFLAGS: 00010246
[    9.644879][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.645206][  T228] RDX: 0000000000000000 RSI: ffff8880023d2c98 RDI: ffff888009fc0b78
[    9.645516][  T228] RBP: ffffffff9f923440 R08: 0000000000000000 R09: fffffbfff3afd83c
[    9.645816][  T228] R10: ffffffff9d7ec1e7 R11: ffff888009fc0040 R12: 0000000000000000
[    9.646141][  T228] R13: ffff8880023d2128 R14: ffff8880023d2008 R15: ffff8880023d2000
[    9.646452][  T228] FS:  00007f2a8f8bf740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[    9.646799][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.647054][  T228] CR2: 00007f3e5f5c1aa0 CR3: 000000000511e004 CR4: 0000000000772ef0
[    9.647366][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.647672][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.647975][  T228] PKRU: 55555554
[    9.648139][  T228] Call Trace:
[    9.648296][  T228]  <TASK>
[ 9.648406][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.648611][ T228] ? __warn (kernel/panic.c:748) 
[ 9.648767][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.648972][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.649191][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.649351][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.649588][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.649803][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.650018][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.650287][ 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) 
[ 9.650497][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.650708][ T228] register_netdevice (net/core/dev.c:11003) 
[ 9.650919][ T228] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.651146][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.651364][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.651624][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 9.651781][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.652044][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.652326][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 9.652587][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 9.652801][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 9.653069][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 9.653281][ 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)) 
[ 9.653435][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 9.653649][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 9.653858][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 9.654072][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 9.654276][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 9.654481][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 9.654726][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 9.654949][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 9.655161][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.655364][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.655564][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 9.655772][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 9.655977][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 9.656196][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.656410][ 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) 
[ 9.656628][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 9.656844][ T228] device_add (drivers/base/core.c:3672) 
[ 9.657054][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 9.657270][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 9.657489][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 9.657751][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 9.658017][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.658231][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 9.658446][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.658649][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 9.658857][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 9.659022][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 9.659244][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 9.659446][ 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) 
[ 9.659658][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 9.659873][ T228] ksys_write (fs/read_write.c:731) 
[ 9.660030][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 9.660259][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 9.660489][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.660702][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.660952][  T228] RIP: 0033:0x7f2a8fa00b77
[ 9.661177][ 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
[    9.661880][  T228] RSP: 002b:00007ffcbfea0a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[    9.662210][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f2a8fa00b77
[    9.662518][  T228] RDX: 0000000000000007 RSI: 000055e60b9434c0 RDI: 0000000000000001
[    9.662823][  T228] RBP: 000055e60b9434c0 R08: 0000000000000003 R09: 0000000000000077
[    9.663140][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[    9.663451][  T228] R13: 00007f2a8fabc760 R14: 0000000000000007 R15: 00007f2a8fab79c0
| [    9.938402][  T255] ------------[ cut here ]------------
| [ 9.938739][ T255] WARNING: CPU: 1 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:10566) 
| [    9.939262][  T255] Modules linked in: netdevsim
| [    9.939997][  T255] Tainted: [W]=WARN
[    9.940210][  T255] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.940496][ T255] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.940788][ T255] 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
[    9.941593][  T255] RSP: 0018:ffffc900007471e8 EFLAGS: 00010246
[    9.941882][  T255] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.942243][  T255] RDX: 0000000000000000 RSI: ffff888005002c98 RDI: ffff88800984adc0
[    9.942590][  T255] RBP: ffff888004f10040 R08: 0000000000000000 R09: fffffbfff3afd83c
[    9.942932][  T255] R10: ffffffff9d7ec1e7 R11: ffff88800984a300 R12: 0000000000000000
[    9.943281][  T255] R13: ffff888005002128 R14: ffff888005002008 R15: ffff888005002000
[    9.943616][  T255] FS:  00007fb5871cd800(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[    9.944006][  T255] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.944306][  T255] CR2: 00007fb58730c440 CR3: 000000000a95a001 CR4: 0000000000772ef0
[    9.944646][  T255] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.944979][  T255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.945327][  T255] PKRU: 55555554
[    9.945501][  T255] Call Trace:
[    9.945673][  T255]  <TASK>
[ 9.945795][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.946023][ T255] ? __warn (kernel/panic.c:748) 
[ 9.946211][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.946441][ T255] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.946675][ T255] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.946848][ T255] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.947086][ T255] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.947327][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.947561][ T255] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 9.947794][ T255] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.948093][ 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) 
[ 9.948328][ T255] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.948566][ T255] register_netdevice (net/core/dev.c:11003) 
[ 9.948799][ T255] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.949042][ T255] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.949301][ T255] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.949597][ T255] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.949897][ T255] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 9.950208][ T255] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 9.950502][ T255] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 9.950794][ T255] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 9.951100][ T255] devlink_reload (net/devlink/dev.c:474) 
[ 9.951335][ T255] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 9.951561][ T255] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 9.951793][ T255] ? cap_capable (security/commoncap.c:131) 
[ 9.952020][ 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) 
[ 9.952230][ T255] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 9.952484][ T255] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 9.952770][ T255] ? __nla_parse (lib/nlattr.c:732) 
[ 9.953008][ T255] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 9.953256][ T255] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 9.953555][ T255] ? cap_capable (security/commoncap.c:131) 
[ 9.953780][ T255] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 9.954019][ T255] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 9.954262][ T255] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 9.954495][ T255] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 9.954777][ T255] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 9.955068][ T255] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 9.955366][ T255] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 9.955602][ T255] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 9.955830][ T255] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 9.956073][ T255] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 9.956317][ T255] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 9.956493][ T255] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 9.956733][ T255] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 9.956973][ T255] genl_rcv (net/netlink/genetlink.c:1220) 
[ 9.957160][ T255] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 9.957400][ T255] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 9.957639][ T255] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 9.957874][ T255] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 9.958121][ T255] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 9.958347][ T255] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 9.958577][ T255] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 9.958812][ T255] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 9.959044][ T255] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 9.959287][ T255] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.959516][ T255] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 9.959756][ T255] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 9.959990][ T255] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 9.960289][ T255] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 9.960580][ T255] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 9.960821][ T255] __x64_sys_sendto (net/socket.c:2181) 
[ 9.961049][ T255] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.961347][ T255] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.961581][ T255] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.961863][  T255] RIP: 0033:0x7fb5873d9a4a
[ 9.962108][ 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
[    9.962906][  T255] RSP: 002b:00007fffc5e482e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[    9.963257][  T255] RAX: ffffffffffffffda RBX: 00000000296dfb00 RCX: 00007fb5873d9a4a
[    9.963597][  T255] RDX: 0000000000000040 RSI: 00000000296dfb00 RDI: 0000000000000005
[    9.963937][  T255] RBP: 00000000296df910 R08: 00007fb58757d200 R09: 000000000000000c
[    9.964284][  T255] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[    9.964626][  T255] R13: 00000000296df910 R14: 0000000000000000 R15: 0000000000000001
| [   36.211513][   T11] ------------[ cut here ]------------
| [ 36.211810][ 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:10566) 
| [   36.212246][   T11] Modules linked in: netdevsim
| [   36.212829][   T11] Tainted: [W]=WARN
[   36.212980][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   36.213313][   T11] Workqueue: netns cleanup_net
[ 36.213538][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.213767][ 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
[   36.214494][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   36.214745][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   36.215035][   T11] RDX: 0000000000000000 RSI: ffff888004e22c98 RDI: ffff888001a82e10
[   36.215424][   T11] RBP: ffffffff9f923440 R08: 0000000000000000 R09: fffffbfff3afd83c
[   36.215709][   T11] R10: ffffffff9d7ec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   36.216005][   T11] R13: ffff888004e22128 R14: ffff888004e22008 R15: ffff888004e22000
[   36.216365][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   36.216692][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.216919][   T11] CR2: 00007f2a8f8be258 CR3: 0000000015128004 CR4: 0000000000772ef0
[   36.217302][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   36.217598][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   36.217880][   T11] PKRU: 55555554
[   36.218022][   T11] Call Trace:
[   36.218177][   T11]  <TASK>
[ 36.218280][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.218470][ T11] ? __warn (kernel/panic.c:748) 
[ 36.218620][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.218819][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 36.219013][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 36.219172][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 36.219368][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 36.219580][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.219791][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 36.220046][ 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) 
[ 36.220277][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 36.220484][ T11] register_netdevice (net/core/dev.c:11003) 
[ 36.220681][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 36.220895][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 36.221133][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 36.221408][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 36.221677][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 36.221925][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 36.222178][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 36.222409][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 36.222651][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 36.222838][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 36.223032][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 36.223260][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 36.223450][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 36.223698][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 36.223889][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 36.224111][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 36.224298][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 36.224492][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 36.224675][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 36.224869][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 36.225083][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 36.225282][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 36.225482][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 36.225681][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 36.225885][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 36.226115][ T11] kthread (kernel/kthread.c:464) 
[ 36.226277][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 36.226487][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 36.226692][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 36.226900][ 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