======================================
| 0
| xx__-> [   11.086540][  T226] ------------[ cut here ]------------
| [ 11.087164][ T226] WARNING: CPU: 3 PID: 226 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) 
| [   11.087898][  T226] Modules linked in: netdevsim
[   11.088787][  T226] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.089093][ T226] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.089408][ T226] 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
[   11.090202][  T226] RSP: 0018:ffffc90000b37520 EFLAGS: 00010246
[   11.090492][  T226] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.090839][  T226] RDX: 0000000000000000 RSI: ffff888004e3ac98 RDI: ffff88800519ae38
[   11.091185][  T226] RBP: ffffffff97f23440 R08: 0000000000000000 R09: fffffbfff2bbd83c
[   11.091526][  T226] R10: ffffffff95dec1e7 R11: ffff88800519a300 R12: 0000000000000000
[   11.091879][  T226] R13: ffff888004e3a128 R14: ffff888004e3a008 R15: ffff888004e3a000
[   11.092221][  T226] FS:  00007f53ca045740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   11.092612][  T226] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.092912][  T226] CR2: 000055e53f2d5598 CR3: 000000000a2c4003 CR4: 0000000000772ef0
[   11.093253][  T226] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.093593][  T226] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.093940][  T226] PKRU: 55555554
[   11.094115][  T226] Call Trace:
[   11.094293][  T226]  <TASK>
[ 11.094415][ T226] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.094647][ T226] ? __warn (kernel/panic.c:748) 
[ 11.094835][ T226] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.095066][ T226] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.095301][ T226] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.095475][ T226] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.095704][ T226] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.095957][ T226] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.096193][ T226] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.096485][ T226] ? _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) 
[ 11.096716][ T226] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.096961][ T226] register_netdevice (net/core/dev.c:11003) 
[ 11.097202][ T226] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.097438][ T226] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.097682][ T226] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.097983][ T226] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 11.098165][ T226] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.098483][ T226] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.098770][ T226] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 11.099074][ T226] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 11.099310][ T226] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 11.099592][ T226] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 11.099831][ T226] ? 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)) 
[ 11.100000][ T226] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 11.100231][ T226] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 11.100583][ T226] __driver_probe_device (drivers/base/dd.c:800) 
[ 11.100807][ T226] driver_probe_device (drivers/base/dd.c:830) 
[ 11.101048][ T226] __device_attach_driver (drivers/base/dd.c:959) 
[ 11.101275][ T226] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 11.101547][ T226] bus_for_each_drv (drivers/base/bus.c:462) 
[ 11.101816][ T226] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 11.102037][ T226] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.102263][ T226] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.102507][ T226] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 11.102738][ T226] __device_attach (drivers/base/dd.c:1030) 
[ 11.102969][ T226] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 11.103190][ T226] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.103414][ T226] ? 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) 
[ 11.103646][ T226] bus_probe_device (drivers/base/bus.c:537) 
[ 11.103887][ T226] device_add (drivers/base/core.c:3672) 
[ 11.104115][ T226] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 11.104342][ T226] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 11.104579][ T226] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 11.104874][ T226] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 11.105166][ T226] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.105388][ T226] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 11.105617][ T226] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.105849][ T226] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 11.106079][ T226] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 11.106259][ T226] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 11.106485][ T226] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 11.106707][ T226] ? 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) 
[ 11.106949][ T226] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 11.107177][ T226] ksys_write (fs/read_write.c:731) 
[ 11.107352][ T226] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 11.107576][ T226] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 11.107845][ T226] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.108071][ T226] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.108365][  T226] RIP: 0033:0x7f53ca186b77
[ 11.108602][ T226] 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
[   11.109392][  T226] RSP: 002b:00007ffcd55021d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   11.109728][  T226] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f53ca186b77
[   11.110070][  T226] RDX: 0000000000000007 RSI: 000055e53f2d4590 RDI: 0000000000000001
[   11.110405][  T226] RBP: 000055e53f2d4590 R08: 0000000000000003 R09: 0000000000000077
[   11.110743][  T226] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   11.111088][  T226] R13: 00007f53ca242760 R14: 0000000000000007 R15: 00007f53ca23d9c0
| [   11.428991][  T246] ------------[ cut here ]------------
| [ 11.429308][ T246] WARNING: CPU: 3 PID: 246 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) 
| [   11.429703][  T246] Modules linked in: netdevsim
| [   11.430412][  T246] Tainted: [W]=WARN
[   11.430579][  T246] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.430856][ T246] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.431107][ T246] 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
[   11.431786][  T246] RSP: 0018:ffffc900005071e8 EFLAGS: 00010246
[   11.432044][  T246] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.432337][  T246] RDX: 0000000000000000 RSI: ffff888004d32c98 RDI: ffff888004f7d080
[   11.432630][  T246] RBP: ffff888004d88040 R08: 0000000000000000 R09: fffffbfff2bbd83c
[   11.432939][  T246] R10: ffffffff95dec1e7 R11: ffff888004f7c5c0 R12: 0000000000000000
[   11.433222][  T246] R13: ffff888004d32128 R14: ffff888004d32008 R15: ffff888004d32000
[   11.433508][  T246] FS:  00007f41d194d800(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   11.433877][  T246] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.434121][  T246] CR2: 00007f41d1a8c440 CR3: 00000000023e2006 CR4: 0000000000772ef0
[   11.434407][  T246] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.434699][  T246] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.435022][  T246] PKRU: 55555554
[   11.435204][  T246] Call Trace:
[   11.435352][  T246]  <TASK>
[ 11.435452][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.435648][ T246] ? __warn (kernel/panic.c:748) 
[ 11.435819][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.436013][ T246] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.436210][ T246] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.436367][ T246] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.436614][ T246] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.436874][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.437068][ T246] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 11.437267][ T246] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.437514][ T246] ? _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) 
[ 11.437724][ T246] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.437932][ T246] register_netdevice (net/core/dev.c:11003) 
[ 11.438130][ T246] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.438345][ T246] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.438567][ T246] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.438852][ T246] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.439109][ T246] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.439369][ T246] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.439619][ T246] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.439880][ T246] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.440135][ T246] devlink_reload (net/devlink/dev.c:474) 
[ 11.440331][ T246] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.440527][ T246] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.440740][ T246] ? cap_capable (security/commoncap.c:131) 
[ 11.440962][ T246] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 11.441119][ T246] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.441319][ T246] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.441556][ T246] ? __nla_parse (lib/nlattr.c:732) 
[ 11.441786][ T246] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.441993][ T246] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.442248][ T246] ? cap_capable (security/commoncap.c:131) 
[ 11.442448][ T246] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.442645][ T246] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.442846][ T246] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.443041][ T246] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.443276][ T246] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.443516][ T246] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.443768][ T246] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.444102][ T246] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.444317][ T246] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.444562][ T246] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.444802][ T246] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.444968][ T246] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.445163][ T246] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.445364][ T246] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.445517][ T246] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.445726][ T246] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.445931][ T246] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.446132][ T246] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.446340][ T246] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.446528][ T246] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.446734][ T246] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.446948][ T246] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.447150][ T246] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.447344][ T246] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.447540][ T246] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.447758][ T246] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.447979][ T246] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.448232][ T246] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.448432][ T246] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.448678][ T246] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.448918][ T246] __x64_sys_sendto (net/socket.c:2181) 
[ 11.449123][ T246] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.449361][ T246] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.449554][ T246] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.449830][  T246] RIP: 0033:0x7f41d1b59a4a
[ 11.450037][ T246] 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
[   11.450698][  T246] RSP: 002b:00007fff2ee20bd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.450993][  T246] RAX: ffffffffffffffda RBX: 0000000032cb2b00 RCX: 00007f41d1b59a4a
[   11.451280][  T246] RDX: 0000000000000040 RSI: 0000000032cb2b00 RDI: 0000000000000005
[   11.451567][  T246] RBP: 0000000032cb2910 R08: 00007f41d1cfd200 R09: 000000000000000c
[   11.451873][  T246] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.452155][  T246] R13: 0000000032cb2910 R14: 0000000000000000 R15: 0000000000000001
| [   83.452547][   T11] ------------[ cut here ]------------
| [ 83.452969][ 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) 
| [   83.453332][   T11] Modules linked in: netdevsim
| [   83.453977][   T11] Tainted: [W]=WARN
[   83.454119][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   83.454349][   T11] Workqueue: netns cleanup_net
[ 83.454569][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.454895][ 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
[   83.455518][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   83.455754][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   83.456110][   T11] RDX: 0000000000000000 RSI: ffff88800ddbac98 RDI: ffff888001a82e10
[   83.456392][   T11] RBP: ffffffff97f23440 R08: 0000000000000000 R09: fffffbfff2bbd83c
[   83.456663][   T11] R10: ffffffff95dec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   83.457026][   T11] R13: ffff88800ddba128 R14: ffff88800ddba008 R15: ffff88800ddba000
[   83.457308][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   83.457654][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.458195][   T11] CR2: 00007fea13651290 CR3: 0000000016d28004 CR4: 0000000000772ef0
[   83.458497][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.458775][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.459065][   T11] PKRU: 55555554
[   83.459209][   T11] Call Trace:
[   83.459361][   T11]  <TASK>
[ 83.459466][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.459655][ T11] ? __warn (kernel/panic.c:748) 
[ 83.459834][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.460028][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 83.460239][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 83.460383][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 83.460573][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 83.460785][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 83.460997][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 83.461273][ 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) 
[ 83.461487][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 83.461677][ T11] register_netdevice (net/core/dev.c:11003) 
[ 83.461902][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 83.462105][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 83.462321][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 83.462558][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 83.462838][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 83.463098][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 83.463364][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 83.463615][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 83.463883][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 83.464095][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 83.464298][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 83.464512][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 83.464706][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 83.464975][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 83.465179][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 83.465364][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 83.465545][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 83.465731][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 83.465929][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 83.466133][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 83.466341][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 83.466547][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 83.466761][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 83.466966][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 83.467184][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 83.467383][ T11] kthread (kernel/kthread.c:464) 
[ 83.467542][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 83.467752][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 83.468017][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 83.468221][ 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