======================================
| 0
| xx__-> [   11.236693][  T227] ------------[ cut here ]------------
| [ 11.237226][ 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) 
| [   11.237914][  T227] Modules linked in: netdevsim
[   11.238899][  T227] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.239357][ T227] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.239804][ 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
[   11.240683][  T227] RSP: 0018:ffffc90000af7520 EFLAGS: 00010246
[   11.241023][  T227] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.241356][  T227] RDX: 0000000000000000 RSI: ffff88800d82ac98 RDI: ffff888004e6d0f8
[   11.241695][  T227] RBP: ffffffffbc323440 R08: 0000000000000000 R09: fffffbfff743d83c
[   11.242025][  T227] R10: ffffffffba1ec1e7 R11: ffff888004e6c5c0 R12: 0000000000000000
[   11.242353][  T227] R13: ffff88800d82a128 R14: ffff88800d82a008 R15: ffff88800d82a000
[   11.242666][  T227] FS:  00007f644e781740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   11.243117][  T227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.243393][  T227] CR2: 000055c15d74c598 CR3: 000000000aa24006 CR4: 0000000000772ef0
[   11.243712][  T227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.244056][  T227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.244391][  T227] PKRU: 55555554
[   11.244564][  T227] Call Trace:
[   11.244731][  T227]  <TASK>
[ 11.244866][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.245113][ T227] ? __warn (kernel/panic.c:748) 
[ 11.245296][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.245518][ T227] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.245743][ T227] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.245923][ T227] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.246146][ T227] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.246389][ T227] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.246621][ T227] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.246918][ 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) 
[ 11.247138][ T227] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.247367][ T227] register_netdevice (net/core/dev.c:11003) 
[ 11.247595][ T227] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.247825][ T227] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.248089][ T227] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.248382][ T227] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 11.248549][ T227] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.248823][ T227] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.249097][ T227] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 11.249380][ T227] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 11.249607][ T227] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 11.249892][ T227] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 11.250114][ 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)) 
[ 11.250290][ T227] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 11.250515][ T227] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 11.250732][ T227] __driver_probe_device (drivers/base/dd.c:800) 
[ 11.250970][ T227] driver_probe_device (drivers/base/dd.c:830) 
[ 11.251175][ T227] __device_attach_driver (drivers/base/dd.c:959) 
[ 11.251393][ T227] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 11.251651][ T227] bus_for_each_drv (drivers/base/bus.c:462) 
[ 11.251868][ T227] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 11.252073][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.252288][ T227] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.252502][ T227] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 11.252716][ T227] __device_attach (drivers/base/dd.c:1030) 
[ 11.252982][ T227] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 11.253285][ T227] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.253501][ 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) 
[ 11.253714][ T227] bus_probe_device (drivers/base/bus.c:537) 
[ 11.253932][ T227] device_add (drivers/base/core.c:3672) 
[ 11.254150][ T227] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 11.254366][ T227] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 11.254593][ T227] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 11.254875][ T227] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 11.255162][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.255378][ T227] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 11.255596][ T227] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.255813][ T227] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 11.256045][ T227] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 11.256217][ T227] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 11.256456][ T227] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 11.256676][ 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) 
[ 11.256914][ T227] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 11.257179][ T227] ksys_write (fs/read_write.c:731) 
[ 11.257360][ T227] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 11.257569][ T227] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 11.257786][ T227] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.258013][ T227] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.258287][  T227] RIP: 0033:0x7f644e8c2b77
[ 11.258507][ 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
[   11.259282][  T227] RSP: 002b:00007ffc5878c758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   11.259602][  T227] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f644e8c2b77
[   11.259931][  T227] RDX: 0000000000000007 RSI: 000055c15d74b590 RDI: 0000000000000001
[   11.260268][  T227] RBP: 000055c15d74b590 R08: 0000000000000003 R09: 0000000000000077
[   11.260615][  T227] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   11.260948][  T227] R13: 00007f644e97e760 R14: 0000000000000007 R15: 00007f644e9799c0
| [   11.566676][  T248] ------------[ cut here ]------------
| [ 11.567194][ 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) 
| [   11.568083][  T248] Modules linked in: netdevsim
| [   11.569093][  T248] Tainted: [W]=WARN
[   11.569414][  T248] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.569827][ T248] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.570300][ 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
[   11.571494][  T248] RSP: 0018:ffffc900007871e8 EFLAGS: 00010246
[   11.571943][  T248] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.572472][  T248] RDX: 0000000000000000 RSI: ffff88800501ac98 RDI: ffff88800a91adc0
[   11.572979][  T248] RBP: ffff8880026f8040 R08: 0000000000000000 R09: fffffbfff743d83c
[   11.573511][  T248] R10: ffffffffba1ec1e7 R11: ffff88800a91a300 R12: 0000000000000000
[   11.574040][  T248] R13: ffff88800501a128 R14: ffff88800501a008 R15: ffff88800501a000
[   11.574580][  T248] FS:  00007facabdc5800(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   11.575200][  T248] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.575643][  T248] CR2: 00007facabf04440 CR3: 0000000004dd6004 CR4: 0000000000772ef0
[   11.576191][  T248] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.576711][  T248] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.577236][  T248] PKRU: 55555554
[   11.577512][  T248] Call Trace:
[   11.577769][  T248]  <TASK>
[ 11.577946][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.578304][ T248] ? __warn (kernel/panic.c:748) 
[ 11.578585][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.578934][ T248] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.579348][ T248] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.579604][ T248] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.579934][ T248] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.580311][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.580668][ T248] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 11.581033][ T248] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.581478][ 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) 
[ 11.581824][ T248] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.582165][ T248] register_netdevice (net/core/dev.c:11003) 
[ 11.582529][ T248] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.582888][ T248] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.583328][ T248] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.583776][ T248] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.584232][ T248] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.584716][ T248] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.585173][ T248] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.585619][ T248] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.586120][ T248] devlink_reload (net/devlink/dev.c:474) 
[ 11.586512][ T248] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.586869][ T248] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.587241][ T248] ? cap_capable (security/commoncap.c:131) 
[ 11.587601][ 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) 
[ 11.587878][ T248] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.588295][ T248] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.588728][ T248] ? __nla_parse (lib/nlattr.c:732) 
[ 11.589086][ T248] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.589448][ T248] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.589901][ T248] ? cap_capable (security/commoncap.c:131) 
[ 11.590242][ T248] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.590620][ T248] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.590986][ T248] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.591346][ T248] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.591764][ T248] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.592181][ T248] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.592626][ T248] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.592969][ T248] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.593345][ T248] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.593704][ T248] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.594100][ T248] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.594379][ T248] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.594730][ T248] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.595099][ T248] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.595383][ T248] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.595742][ T248] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.596088][ T248] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.596457][ T248] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.596818][ T248] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.597159][ T248] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.597527][ T248] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.597887][ T248] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.598300][ T248] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.598641][ T248] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.598979][ T248] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.599362][ T248] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.599710][ T248] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.600168][ T248] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.600540][ T248] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.600976][ T248] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.601372][ T248] __x64_sys_sendto (net/socket.c:2181) 
[ 11.601744][ T248] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.602189][ T248] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.602555][ T248] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.602981][  T248] RIP: 0033:0x7facabfd1a4a
[ 11.603369][ 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
[   11.604586][  T248] RSP: 002b:00007fffe6d2c1a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.605144][  T248] RAX: ffffffffffffffda RBX: 0000000006986b00 RCX: 00007facabfd1a4a
[   11.605674][  T248] RDX: 0000000000000040 RSI: 0000000006986b00 RDI: 0000000000000005
[   11.606176][  T248] RBP: 0000000006986910 R08: 00007facac175200 R09: 000000000000000c
[   11.606722][  T248] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.607214][  T248] R13: 0000000006986910 R14: 0000000000000000 R15: 0000000000000001
| [   83.945742][   T11] ------------[ cut here ]------------
| [ 83.946086][ 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) 
| [   83.946509][   T11] Modules linked in: netdevsim
| [   83.947125][   T11] Tainted: [W]=WARN
[   83.947329][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   83.947590][   T11] Workqueue: netns cleanup_net
[ 83.947851][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.948121][ 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
[   83.948870][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   83.949130][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   83.949442][   T11] RDX: 0000000000000000 RSI: ffff88800d832c98 RDI: ffff888001a82e10
[   83.949749][   T11] RBP: ffffffffbc323440 R08: 0000000000000000 R09: fffffbfff743d83c
[   83.950053][   T11] R10: ffffffffba1ec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   83.950367][   T11] R13: ffff88800d832128 R14: ffff88800d832008 R15: ffff88800d832000
[   83.950678][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   83.951031][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.951300][   T11] CR2: 00007fcdbbf45000 CR3: 000000001d528004 CR4: 0000000000772ef0
[   83.951817][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.952137][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.952457][   T11] PKRU: 55555554
[   83.952621][   T11] Call Trace:
[   83.952779][   T11]  <TASK>
[ 83.952888][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.953106][ T11] ? __warn (kernel/panic.c:748) 
[ 83.953284][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.953490][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 83.953701][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 83.953863][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 83.954062][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 83.954292][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.954513][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 83.954795][ 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) 
[ 83.955007][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 83.955221][ T11] register_netdevice (net/core/dev.c:11003) 
[ 83.955439][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 83.955659][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 83.955871][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 83.956134][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 83.956403][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 83.956669][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 83.956934][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 83.957189][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 83.957472][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 83.957686][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 83.957893][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 83.958115][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 83.958344][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 83.958615][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 83.958831][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 83.959045][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 83.959263][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 83.959479][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 83.959691][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 83.959914][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 83.960137][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 83.960359][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 83.960582][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 83.960798][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 83.961024][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 83.961229][ T11] kthread (kernel/kthread.c:464) 
[ 83.961396][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 83.961608][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 83.961813][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 83.962016][ 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