======================================
| 0
| xx__-> [   11.391953][  T228] ------------[ cut here ]------------
| [ 11.392490][ T228] WARNING: CPU: 0 PID: 228 at ./include/net/netdev_lock.h:52 __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
| [   11.393033][  T228] Modules linked in: netdevsim
[   11.393810][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.394153][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.394507][ 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
[   11.395413][  T228] RSP: 0018:ffffc90000ac7520 EFLAGS: 00010246
[   11.395744][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.396147][  T228] RDX: 0000000000000000 RSI: ffff88800d1bac98 RDI: ffff88800a11ae38
[   11.396543][  T228] RBP: ffffffff9b123440 R08: 0000000000000000 R09: fffffbfff31fd83c
[   11.396922][  T228] R10: ffffffff98fec1e7 R11: ffff88800a11a300 R12: 0000000000000000
[   11.397306][  T228] R13: ffff88800d1ba128 R14: ffff88800d1ba008 R15: ffff88800d1ba000
[   11.397696][  T228] FS:  00007f58f9e71740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   11.398178][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.398494][  T228] CR2: 00005617f981e598 CR3: 0000000008800005 CR4: 0000000000772ef0
[   11.398878][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.399278][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.399652][  T228] PKRU: 55555554
[   11.399849][  T228] Call Trace:
[   11.400042][  T228]  <TASK>
[ 11.400199][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.400455][ T228] ? __warn (kernel/panic.c:748) 
[ 11.400649][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.400898][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.401166][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.401360][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.401608][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.401873][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.402150][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.402470][ 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) 
[ 11.402725][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.402977][ T228] register_netdevice (net/core/dev.c:11003) 
[ 11.403253][ T228] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.403514][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.403790][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.404129][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 11.404330][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.404667][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.405003][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 11.405352][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 11.405630][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 11.405966][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 11.406239][ 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)) 
[ 11.406439][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 11.406702][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 11.406966][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 11.407239][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 11.407496][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 11.407763][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 11.408091][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 11.408350][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 11.408607][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.408878][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.409148][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 11.409414][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 11.409679][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 11.409931][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 11.410200][ 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) 
[ 11.410462][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 11.410719][ T228] device_add (drivers/base/core.c:3672) 
[ 11.410979][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 11.411245][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 11.411524][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 11.411858][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 11.412205][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.412464][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 11.412728][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 11.412985][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 11.413265][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 11.413478][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 11.413741][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 11.413996][ 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) 
[ 11.414276][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 11.414543][ T228] ksys_write (fs/read_write.c:731) 
[ 11.414744][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 11.414998][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 11.415281][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.415549][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.415868][  T228] RIP: 0033:0x7f58f9fb2b77
[ 11.416151][ 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
[   11.417061][  T228] RSP: 002b:00007fff77111e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   11.417473][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f58f9fb2b77
[   11.417857][  T228] RDX: 0000000000000007 RSI: 00005617f981d590 RDI: 0000000000000001
[   11.418253][  T228] RBP: 00005617f981d590 R08: 0000000000000003 R09: 0000000000000077
[   11.418650][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   11.419054][  T228] R13: 00007f58fa06e760 R14: 0000000000000007 R15: 00007f58fa0699c0
| [   11.776572][  T247] ------------[ cut here ]------------
| [ 11.777034][ T247] WARNING: CPU: 3 PID: 247 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) 
| [   11.777845][  T247] Modules linked in: netdevsim
| [   11.778781][  T247] Tainted: [W]=WARN
[   11.779125][  T247] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.779544][ T247] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.779982][ T247] 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
[   11.781152][  T247] RSP: 0018:ffffc900005871e8 EFLAGS: 00010246
[   11.781576][  T247] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.782069][  T247] RDX: 0000000000000000 RSI: ffff88800a3fac98 RDI: ffff88800a0b2dc0
[   11.782587][  T247] RBP: ffff888008ea0040 R08: 0000000000000000 R09: fffffbfff31fd83c
[   11.783097][  T247] R10: ffffffff98fec1e7 R11: ffff88800a0b2300 R12: 0000000000000000
[   11.783589][  T247] R13: ffff88800a3fa128 R14: ffff88800a3fa008 R15: ffff88800a3fa000
[   11.784099][  T247] FS:  00007fd8e0140800(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   11.784773][  T247] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.785203][  T247] CR2: 00007fd8e04061c4 CR3: 000000000ab4e003 CR4: 0000000000772ef0
[   11.785684][  T247] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.786177][  T247] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.786654][  T247] PKRU: 55555554
[   11.786909][  T247] Call Trace:
[   11.787172][  T247]  <TASK>
[ 11.787345][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.787672][ T247] ? __warn (kernel/panic.c:748) 
[ 11.787924][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.788270][ T247] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.788609][ T247] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.788868][ T247] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.789205][ T247] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.789563][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.789899][ T247] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 11.790253][ T247] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.790671][ T247] ? _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) 
[ 11.791014][ T247] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.791369][ T247] register_netdevice (net/core/dev.c:11003) 
[ 11.791723][ T247] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.792072][ T247] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.792450][ T247] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.792883][ T247] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.793334][ T247] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.793761][ T247] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.794200][ T247] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.794612][ T247] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.795050][ T247] devlink_reload (net/devlink/dev.c:474) 
[ 11.795414][ T247] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.795733][ T247] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.796068][ T247] ? cap_capable (security/commoncap.c:131) 
[ 11.796423][ T247] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 11.796689][ T247] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.797023][ T247] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.797453][ T247] ? __nla_parse (lib/nlattr.c:732) 
[ 11.797801][ T247] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.798149][ T247] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.798593][ T247] ? cap_capable (security/commoncap.c:131) 
[ 11.798939][ T247] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.799560][ T247] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.799869][ T247] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.800232][ T247] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.800633][ T247] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.801031][ T247] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.801489][ T247] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.801826][ T247] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.802164][ T247] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.802497][ T247] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.802882][ T247] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.803181][ T247] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.803513][ T247] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.803854][ T247] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.804129][ T247] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.804462][ T247] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.804791][ T247] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.805148][ T247] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.805484][ T247] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.805803][ T247] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.806160][ T247] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.806504][ T247] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.806841][ T247] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.807197][ T247] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.807544][ T247] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.807915][ T247] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.808302][ T247] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.808715][ T247] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.809058][ T247] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.809301][ T247] __x64_sys_sendto (net/socket.c:2181) 
[ 11.809514][ T247] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.809768][ T247] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.809979][ T247] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.810283][  T247] RIP: 0033:0x7fd8e034ca4a
[ 11.810507][ T247] 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
[   11.811260][  T247] RSP: 002b:00007ffda2856a48 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.811573][  T247] RAX: ffffffffffffffda RBX: 000000002229ab00 RCX: 00007fd8e034ca4a
[   11.811878][  T247] RDX: 0000000000000040 RSI: 000000002229ab00 RDI: 0000000000000005
[   11.812202][  T247] RBP: 000000002229a910 R08: 00007fd8e04f0200 R09: 000000000000000c
[   11.812520][  T247] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.812824][  T247] R13: 000000002229a910 R14: 0000000000000000 R15: 0000000000000001
| [   84.233360][   T11] ------------[ cut here ]------------
| [ 84.233860][ T11] WARNING: CPU: 2 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) 
| [   84.234529][   T11] Modules linked in: netdevsim
| [   84.235484][   T11] Tainted: [W]=WARN
[   84.235713][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   84.236121][   T11] Workqueue: netns cleanup_net
[ 84.236511][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 84.236903][ 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
[   84.237911][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   84.238321][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   84.238797][   T11] RDX: 0000000000000000 RSI: ffff88800d1c2c98 RDI: ffff888001a82e10
[   84.239269][   T11] RBP: ffffffff9b123440 R08: 0000000000000000 R09: fffffbfff31fd83c
[   84.239725][   T11] R10: ffffffff98fec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   84.240223][   T11] R13: ffff88800d1c2128 R14: ffff88800d1c2008 R15: ffff88800d1c2000
[   84.240675][   T11] FS:  0000000000000000(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   84.241234][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.241602][   T11] CR2: 00005617f981d590 CR3: 0000000008800006 CR4: 0000000000772ef0
[   84.242421][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   84.242878][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   84.243349][   T11] PKRU: 55555554
[   84.243594][   T11] Call Trace:
[   84.243840][   T11]  <TASK>
[ 84.244014][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 84.244366][ T11] ? __warn (kernel/panic.c:748) 
[ 84.244652][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 84.244981][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 84.245331][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 84.245578][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 84.245902][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 84.246283][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 84.246624][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 84.247024][ 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) 
[ 84.247368][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 84.247696][ T11] register_netdevice (net/core/dev.c:11003) 
[ 84.248031][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 84.248435][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 84.248816][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 84.249259][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 84.249696][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 84.250135][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 84.250550][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 84.250972][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 84.251436][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 84.251774][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 84.252120][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 84.252456][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 84.252787][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 84.253213][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 84.253538][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 84.253857][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 84.254196][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 84.254535][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 84.254844][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 84.255200][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 84.255544][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 84.255851][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 84.256180][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 84.256485][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 84.256804][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 84.257122][ T11] kthread (kernel/kthread.c:464) 
[ 84.257356][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 84.257665][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 84.257959][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 84.258270][ 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