======================================
| 0
| xx__-> [   11.224440][  T229] ------------[ cut here ]------------
| [ 11.224874][ T229] WARNING: CPU: 0 PID: 229 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) 
| [   11.225366][  T229] Modules linked in: netdevsim
[   11.226023][  T229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.226398][ T229] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.226696][ T229] 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
[   11.227490][  T229] RSP: 0018:ffffc90000aa7520 EFLAGS: 00010246
[   11.227779][  T229] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.228118][  T229] RDX: 0000000000000000 RSI: ffff88800a04ac98 RDI: ffff8880050350f8
[   11.228463][  T229] RBP: ffffffff9f923440 R08: 0000000000000000 R09: fffffbfff3afd83c
[   11.228809][  T229] R10: ffffffff9d7ec1e7 R11: ffff8880050345c0 R12: 0000000000000000
[   11.229173][  T229] R13: ffff88800a04a128 R14: ffff88800a04a008 R15: ffff88800a04a000
[   11.229531][  T229] FS:  00007eff868c1740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   11.229927][  T229] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.230248][  T229] CR2: 00005643e6d52598 CR3: 000000000b7ea005 CR4: 0000000000772ef0
[   11.230593][  T229] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.230942][  T229] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.231295][  T229] PKRU: 55555554
[   11.231477][  T229] Call Trace:
[   11.231658][  T229]  <TASK>
[ 11.231781][ T229] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.232022][ T229] ? __warn (kernel/panic.c:748) 
[ 11.232210][ T229] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.232445][ T229] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.232684][ T229] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.232864][ T229] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.233098][ T229] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.233355][ T229] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.233599][ T229] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.233896][ T229] ? _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) 
[ 11.234147][ T229] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.234392][ T229] register_netdevice (net/core/dev.c:11003) 
[ 11.234634][ T229] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.234886][ T229] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.235131][ T229] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.235435][ T229] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 11.235611][ T229] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.235921][ T229] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.236227][ T229] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 11.236523][ T229] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 11.236768][ T229] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 11.237058][ T229] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 11.237302][ T229] ? 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)) 
[ 11.237487][ T229] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 11.237727][ T229] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 11.237969][ T229] __driver_probe_device (drivers/base/dd.c:800) 
[ 11.238209][ T229] driver_probe_device (drivers/base/dd.c:830) 
[ 11.238451][ T229] __device_attach_driver (drivers/base/dd.c:959) 
[ 11.238685][ T229] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 11.238972][ T229] bus_for_each_drv (drivers/base/bus.c:462) 
[ 11.239217][ T229] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 11.239447][ T229] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.239687][ T229] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.239914][ T229] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 11.240163][ T229] __device_attach (drivers/base/dd.c:1030) 
[ 11.240484][ T229] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 11.240705][ T229] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.240943][ T229] ? 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) 
[ 11.241189][ T229] bus_probe_device (drivers/base/bus.c:537) 
[ 11.241414][ T229] device_add (drivers/base/core.c:3672) 
[ 11.241661][ T229] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 11.241894][ T229] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 11.242148][ T229] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 11.242444][ T229] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 11.242750][ T229] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.242983][ T229] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 11.243231][ T229] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.243467][ T229] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 11.243711][ T229] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 11.243895][ T229] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 11.244131][ T229] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 11.244380][ T229] ? 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) 
[ 11.244620][ T229] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 11.244858][ T229] ksys_write (fs/read_write.c:731) 
[ 11.245039][ T229] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 11.245278][ T229] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 11.245521][ T229] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.245759][ T229] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.246042][  T229] RIP: 0033:0x7eff86a02b77
[ 11.246295][ T229] 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
[   11.247087][  T229] RSP: 002b:00007fff2ae605a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   11.247454][  T229] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007eff86a02b77
[   11.247805][  T229] RDX: 0000000000000007 RSI: 00005643e6d51590 RDI: 0000000000000001
[   11.248158][  T229] RBP: 00005643e6d51590 R08: 0000000000000003 R09: 0000000000000077
[   11.248505][  T229] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   11.248971][  T229] R13: 00007eff86abe760 R14: 0000000000000007 R15: 00007eff86ab99c0
| [   11.537652][  T248] ------------[ cut here ]------------
| [ 11.538241][ T248] WARNING: CPU: 3 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:10566) 
| [   11.538891][  T248] Modules linked in: netdevsim
| [   11.540023][  T248] Tainted: [W]=WARN
[   11.540319][  T248] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.540716][ T248] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.541134][ T248] 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
[   11.542308][  T248] RSP: 0018:ffffc90000ac71e8 EFLAGS: 00010246
[   11.542725][  T248] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.543219][  T248] RDX: 0000000000000000 RSI: ffff88800a0f2c98 RDI: ffff88800a4dadc0
[   11.543697][  T248] RBP: ffff8880059f0040 R08: 0000000000000000 R09: fffffbfff3afd83c
[   11.544195][  T248] R10: ffffffff9d7ec1e7 R11: ffff88800a4da300 R12: 0000000000000000
[   11.544688][  T248] R13: ffff88800a0f2128 R14: ffff88800a0f2008 R15: ffff88800a0f2000
[   11.545205][  T248] FS:  00007f5218d0a800(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   11.545781][  T248] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.546206][  T248] CR2: 00007f5218e49440 CR3: 000000000925a004 CR4: 0000000000772ef0
[   11.546701][  T248] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.547200][  T248] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.547689][  T248] PKRU: 55555554
[   11.547940][  T248] Call Trace:
[   11.548205][  T248]  <TASK>
[ 11.548375][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.548705][ T248] ? __warn (kernel/panic.c:748) 
[ 11.548949][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.549332][ T248] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.549685][ T248] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.549935][ T248] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.550291][ T248] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.550639][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.550969][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 11.551335][ T248] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.551752][ 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) 
[ 11.552090][ T248] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.552443][ T248] register_netdevice (net/core/dev.c:11003) 
[ 11.552776][ T248] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.553122][ T248] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.553518][ T248] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.553957][ T248] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.554420][ T248] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.554861][ T248] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.555298][ T248] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.555729][ T248] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.556179][ T248] devlink_reload (net/devlink/dev.c:474) 
[ 11.556520][ T248] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.556847][ T248] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.557202][ T248] ? cap_capable (security/commoncap.c:131) 
[ 11.557522][ 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) 
[ 11.557789][ T248] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.558125][ T248] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.558555][ T248] ? __nla_parse (lib/nlattr.c:732) 
[ 11.558895][ T248] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.559243][ T248] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.559691][ T248] ? cap_capable (security/commoncap.c:131) 
[ 11.560015][ T248] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.560372][ T248] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.560710][ T248] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.561037][ T248] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.561461][ T248] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.561863][ T248] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.562293][ T248] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.562604][ T248] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.562914][ T248] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.563257][ T248] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.563596][ T248] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.563832][ T248] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.564170][ T248] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.564499][ T248] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.564737][ T248] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.565067][ T248] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.565404][ T248] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.565733][ T248] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.566059][ T248] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.566381][ T248] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.566694][ T248] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.567027][ T248] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.567356][ T248] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.567664][ T248] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.567986][ T248] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.568328][ T248] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.568646][ T248] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.569033][ T248] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.569365][ T248] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.569768][ T248] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.570100][ T248] __x64_sys_sendto (net/socket.c:2181) 
[ 11.570429][ T248] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.570815][ T248] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.571148][ T248] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.571529][  T248] RIP: 0033:0x7f5218f16a4a
[ 11.571847][ 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
[   11.572978][  T248] RSP: 002b:00007ffdc5149d88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.573448][  T248] RAX: ffffffffffffffda RBX: 000000000f6c2b00 RCX: 00007f5218f16a4a
[   11.573913][  T248] RDX: 0000000000000040 RSI: 000000000f6c2b00 RDI: 0000000000000005
[   11.574412][  T248] RBP: 000000000f6c2910 R08: 00007f52190ba200 R09: 000000000000000c
[   11.574884][  T248] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.575390][  T248] R13: 000000000f6c2910 R14: 0000000000000000 R15: 0000000000000001
| [   81.155439][   T67] ------------[ cut here ]------------
| [ 81.155729][ T67] WARNING: CPU: 0 PID: 67 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [   81.156105][   T67] Modules linked in: netdevsim
| [   81.156728][   T67] Tainted: [W]=WARN
[   81.156872][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   81.157105][   T67] Workqueue: netns cleanup_net
[ 81.157332][ T67] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 81.157570][ T67] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 00 85 c0 0f 85 99 00 00 00 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 20 48 c1 ea 03
All code
========
   0:	00 e8                	add    %ch,%al
   2:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 99 00 00 00    	jne    0xc2
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
  12:	48 c1 ea 03          	shr    $0x3,%rdx
[   81.158218][   T67] RSP: 0018:ffffc90000487620 EFLAGS: 00010246
[   81.158458][   T67] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   81.158735][   T67] RDX: 0000000000000000 RSI: ffff88800523ac98 RDI: ffff888008e90b50
[   81.159012][   T67] RBP: ffffffff9f923440 R08: 0000000000000000 R09: fffffbfff3afd83c
[   81.159304][   T67] R10: ffffffff9d7ec1e7 R11: ffff888008e90040 R12: 0000000000000000
[   81.159578][   T67] R13: ffff88800523a128 R14: ffff88800523a008 R15: ffff88800523a000
[   81.159858][   T67] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   81.160190][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   81.160425][   T67] CR2: 00005643e6d51590 CR3: 000000000b7ea004 CR4: 0000000000772ef0
[   81.160703][   T67] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   81.161059][   T67] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   81.161348][   T67] PKRU: 55555554
[   81.161489][   T67] Call Trace:
[   81.161628][   T67]  <TASK>
[ 81.161725][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 81.161916][ T67] ? __warn (kernel/panic.c:748) 
[ 81.162061][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 81.162256][ T67] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 81.162452][ T67] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 81.162598][ T67] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 81.162782][ T67] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 81.162984][ T67] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 81.163196][ T67] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 81.163435][ 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) 
[ 81.163625][ T67] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 81.163813][ T67] register_netdevice (net/core/dev.c:11003) 
[ 81.164007][ T67] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 81.164219][ T67] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 81.164424][ T67] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 81.164665][ T67] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 81.164917][ T67] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 81.165174][ T67] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 81.165417][ T67] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 81.165655][ T67] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 81.165902][ T67] devlink_reload (net/devlink/dev.c:474) 
[ 81.166097][ T67] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 81.166299][ T67] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 81.166498][ T67] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 81.166689][ T67] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 81.166934][ T67] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 81.167124][ T67] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 81.167324][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 81.167510][ T67] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 81.167704][ T67] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 81.167891][ T67] ? process_one_work (kernel/workqueue.c:3214) 
[ 81.168086][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 81.168302][ T67] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 81.168491][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 81.168687][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 81.168881][ T67] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 81.169069][ T67] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 81.169339][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 81.169533][ T67] kthread (kernel/kthread.c:464) 
[ 81.169678][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 81.169869][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 81.170056][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 81.170252][ 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