======================================
| 0
| xx__-> [   10.107830][  T228] ------------[ cut here ]------------
| [ 10.108194][ T228] WARNING: CPU: 2 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) 
| [   10.108726][  T228] Modules linked in: netdevsim
[   10.109358][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.109635][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.109915][ 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
[   10.110654][  T228] RSP: 0018:ffffc90000b17520 EFLAGS: 00010246
[   10.110934][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.111282][  T228] RDX: 0000000000000000 RSI: ffff8880025bac98 RDI: ffff88800ab5d0f8
[   10.111604][  T228] RBP: ffffffff8ed23440 R08: 0000000000000000 R09: fffffbfff197d83c
[   10.111937][  T228] R10: ffffffff8cbec1e7 R11: ffff88800ab5c5c0 R12: 0000000000000000
[   10.112267][  T228] R13: ffff8880025ba128 R14: ffff8880025ba008 R15: ffff8880025ba000
[   10.112593][  T228] FS:  00007f3f03f1c740(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   10.112964][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.113237][  T228] CR2: 0000555fa283c4c8 CR3: 00000000098b0003 CR4: 0000000000772ef0
[   10.113574][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.113896][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.114217][  T228] PKRU: 55555554
[   10.114397][  T228] Call Trace:
[   10.114572][  T228]  <TASK>
[ 10.114695][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.114922][ T228] ? __warn (kernel/panic.c:748) 
[ 10.115093][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.115325][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.115553][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.115723][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.115944][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.116177][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.116415][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.116694][ 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) 
[ 10.116923][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.117145][ T228] register_netdevice (net/core/dev.c:11003) 
[ 10.117385][ T228] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.117638][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.117875][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.118150][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 10.118335][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.118621][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.118899][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 10.119176][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 10.119420][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 10.119693][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 10.119918][ 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)) 
[ 10.120086][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 10.120331][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 10.120562][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 10.120784][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 10.121005][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 10.121233][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 10.121509][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 10.121729][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 10.121947][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.122184][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.122418][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 10.122645][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 10.122868][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 10.123086][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.123318][ 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) 
[ 10.123556][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 10.123783][ T228] device_add (drivers/base/core.c:3672) 
[ 10.124010][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 10.124230][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 10.124475][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 10.124762][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 10.125046][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.125275][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 10.125508][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.125727][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 10.125953][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 10.126132][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 10.126368][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.126589][ 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) 
[ 10.126822][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.127053][ T228] ksys_write (fs/read_write.c:731) 
[ 10.127226][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 10.127456][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.127701][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.127923][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.128194][  T228] RIP: 0033:0x7f3f0405db77
[ 10.128437][ 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
[   10.129178][  T228] RSP: 002b:00007ffc99a982c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   10.129514][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f3f0405db77
[   10.129834][  T228] RDX: 0000000000000007 RSI: 0000555fa283b4c0 RDI: 0000000000000001
[   10.130163][  T228] RBP: 0000555fa283b4c0 R08: 0000000000000003 R09: 0000000000000077
[   10.130495][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   10.130816][  T228] R13: 00007f3f04119760 R14: 0000000000000007 R15: 00007f3f041149c0
| [   10.398626][  T256] ------------[ cut here ]------------
| [ 10.398947][ T256] WARNING: CPU: 2 PID: 256 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) 
| [   10.399360][  T256] Modules linked in: netdevsim
| [   10.399996][  T256] Tainted: [W]=WARN
[   10.400167][  T256] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.400821][ T256] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.401080][ T256] 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
[   10.401775][  T256] RSP: 0018:ffffc900005871e8 EFLAGS: 00010246
[   10.402029][  T256] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.402330][  T256] RDX: 0000000000000000 RSI: ffff8880053bac98 RDI: ffff88800a01adc0
[   10.402621][  T256] RBP: ffff888005108040 R08: 0000000000000000 R09: fffffbfff197d83c
[   10.402912][  T256] R10: ffffffff8cbec1e7 R11: ffff88800a01a300 R12: 0000000000000000
[   10.403203][  T256] R13: ffff8880053ba128 R14: ffff8880053ba008 R15: ffff8880053ba000
[   10.403501][  T256] FS:  00007ff5cf2fd800(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   10.403840][  T256] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.404086][  T256] CR2: 00007ff5cf43c440 CR3: 0000000009710003 CR4: 0000000000772ef0
[   10.404390][  T256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.404690][  T256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.404981][  T256] PKRU: 55555554
[   10.405139][  T256] Call Trace:
[   10.405305][  T256]  <TASK>
[ 10.405415][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.405622][ T256] ? __warn (kernel/panic.c:748) 
[ 10.405780][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.405985][ T256] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.406198][ T256] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.406364][ T256] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.406569][ T256] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.406783][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.406989][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.407193][ T256] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.407454][ T256] ? _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) 
[ 10.407671][ T256] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.407878][ T256] register_netdevice (net/core/dev.c:11003) 
[ 10.408085][ T256] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.408309][ T256] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.408525][ T256] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.408785][ T256] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.409046][ T256] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 10.409317][ T256] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 10.409577][ T256] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 10.409830][ T256] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 10.410085][ T256] devlink_reload (net/devlink/dev.c:474) 
[ 10.410301][ T256] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 10.410500][ T256] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 10.410707][ T256] ? cap_capable (security/commoncap.c:131) 
[ 10.410909][ T256] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 10.411082][ T256] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 10.411295][ T256] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.411545][ T256] ? __nla_parse (lib/nlattr.c:732) 
[ 10.411753][ T256] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 10.411960][ T256] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 10.412218][ T256] ? cap_capable (security/commoncap.c:131) 
[ 10.412428][ T256] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 10.412642][ T256] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 10.412855][ T256] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 10.413060][ T256] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 10.413328][ T256] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 10.413576][ T256] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 10.413851][ T256] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 10.414058][ T256] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 10.414271][ T256] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 10.414484][ T256] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 10.414701][ T256] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 10.414862][ T256] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 10.415068][ T256] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 10.415292][ T256] genl_rcv (net/netlink/genetlink.c:1220) 
[ 10.415449][ T256] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 10.415658][ T256] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 10.415866][ T256] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 10.416072][ T256] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 10.416303][ T256] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 10.416504][ T256] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 10.416708][ T256] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 10.416920][ T256] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 10.417126][ T256] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 10.417335][ T256] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.417556][ T256] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 10.417772][ T256] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.417985][ T256] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 10.418231][ T256] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 10.418446][ T256] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 10.418697][ T256] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 10.418913][ T256] __x64_sys_sendto (net/socket.c:2181) 
[ 10.419117][ T256] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.419374][ T256] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.419581][ T256] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.419829][  T256] RIP: 0033:0x7ff5cf509a4a
[ 10.420038][ T256] 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
[   10.420723][  T256] RSP: 002b:00007ffdffa30af8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   10.421025][  T256] RAX: ffffffffffffffda RBX: 000000000a269b00 RCX: 00007ff5cf509a4a
[   10.421324][  T256] RDX: 0000000000000040 RSI: 000000000a269b00 RDI: 0000000000000005
[   10.421615][  T256] RBP: 000000000a269910 R08: 00007ff5cf6ad200 R09: 000000000000000c
[   10.421903][  T256] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   10.422191][  T256] R13: 000000000a269910 R14: 0000000000000000 R15: 0000000000000001
| [   36.747860][   T11] ------------[ cut here ]------------
| [ 36.748135][ 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) 
| [   36.748493][   T11] Modules linked in: netdevsim
| [   36.749044][   T11] Tainted: [W]=WARN
[   36.749172][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   36.749395][   T11] Workqueue: netns cleanup_net
[ 36.749593][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.749806][ 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
[   36.750391][   T11] RSP: 0000:ffffc900000b7620 EFLAGS: 00010246
[   36.750604][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   36.750854][   T11] RDX: 0000000000000000 RSI: ffff88800a92ac98 RDI: ffff888001a82e10
[   36.751104][   T11] RBP: ffffffff8ed23440 R08: 0000000000000000 R09: fffffbfff197d83c
[   36.751369][   T11] R10: ffffffff8cbec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   36.751616][   T11] R13: ffff88800a92a128 R14: ffff88800a92a008 R15: ffff88800a92a000
[   36.751867][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   36.752256][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.752466][   T11] CR2: 0000000000401130 CR3: 000000001ff28002 CR4: 0000000000772ef0
[   36.752717][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   36.752994][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   36.753262][   T11] PKRU: 55555554
[   36.753389][   T11] Call Trace:
[   36.753517][   T11]  <TASK>
[ 36.753606][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.753776][ T11] ? __warn (kernel/panic.c:748) 
[ 36.753909][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.754079][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 36.754316][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 36.754450][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 36.754620][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 36.754803][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 36.754978][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 36.755195][ 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) 
[ 36.755375][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 36.755549][ T11] register_netdevice (net/core/dev.c:11003) 
[ 36.755722][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 36.755900][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 36.756081][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 36.756307][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 36.756534][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 36.756756][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 36.757003][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 36.757221][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 36.757469][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 36.757649][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 36.757821][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 36.757999][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 36.758170][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 36.758407][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 36.758576][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 36.758746][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 36.758909][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 36.759083][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 36.759259][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 36.759435][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 36.759615][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 36.759786][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 36.759967][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 36.760142][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 36.760340][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 36.760523][ T11] kthread (kernel/kthread.c:464) 
[ 36.760652][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 36.760829][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 36.761032][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 36.761202][ 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