======================================
| [ 3184.370280][ T1387] MACsec IEEE 802.1AE
| [ 3187.253020][T30669] ------------[ cut here ]------------
| [3187.253522][T30669] WARNING: CPU: 2 PID: 30669 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:10596) 
| [ 3187.253963][T30669] Modules linked in: netdevsim macsec ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xfrm_user geneve vxlan act_csum act_pedit cls_flower sch_prio openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh
[ 3187.255492][T30669] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3187.255774][T30669] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 3187.256054][T30669] Code: 00 e8 13 47 fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf d0 0c 00 00 be ff ff ff ff e8 98 5f 99 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:	13 47 fe             	adc    -0x2(%rdi),%eax
   5:	ff 48 8b             	decl   -0x75(%rax)
   8:	5c                   	pop    %rsp
   9:	24 58                	and    $0x58,%al
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf d0 0c 00 00 	lea    0xcd0(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 98 5f 99 00       	call   0x995fb9
  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
[ 3187.256802][T30669] RSP: 0018:ffffc900058c7528 EFLAGS: 00010246
[ 3187.257097][T30669] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3187.257427][T30669] RDX: 0000000000000000 RSI: ffff888015772cd0 RDI: ffff888009fd0b78
[ 3187.257754][T30669] RBP: ffffffffad053580 R08: 0000000000000000 R09: fffffbfff55c2504
[ 3187.258091][T30669] R10: ffffffffaae12827 R11: ffff888009fd0040 R12: 0000000000000000
[ 3187.258568][T30669] R13: ffff888015772130 R14: ffff888015772008 R15: ffff888015772000
[ 3187.258906][T30669] FS:  00007f4da6ad7740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 3187.259497][T30669] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3187.259836][T30669] CR2: 0000559749a83760 CR3: 00000000157a6004 CR4: 0000000000772ef0
[ 3187.260177][T30669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3187.260505][T30669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3187.260831][T30669] PKRU: 55555554
[ 3187.261006][T30669] Call Trace:
[ 3187.261192][T30669]  <TASK>
[3187.261320][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3187.261550][T30669] ? __warn (kernel/panic.c:748) 
[3187.261724][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3187.261949][T30669] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3187.262197][T30669] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3187.262373][T30669] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3187.262596][T30669] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3187.262836][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3187.263060][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[3187.263301][T30669] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[3187.263583][T30669] ? _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) 
[3187.263813][T30669] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3187.264053][T30669] register_netdevice (net/core/dev.c:11033) 
[3187.264312][T30669] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[3187.264559][T30669] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3187.264794][T30669] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3187.265031][T30669] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3187.265322][T30669] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3187.265502][T30669] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3187.265793][T30669] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3187.266083][T30669] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3187.266365][T30669] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3187.266598][T30669] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3187.266872][T30669] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3187.267106][T30669] ? 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)) 
[3187.267283][T30669] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3187.267516][T30669] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3187.267742][T30669] __driver_probe_device (drivers/base/dd.c:800) 
[3187.267964][T30669] driver_probe_device (drivers/base/dd.c:830) 
[3187.268197][T30669] __device_attach_driver (drivers/base/dd.c:959) 
[3187.268422][T30669] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3187.268694][T30669] bus_for_each_drv (drivers/base/bus.c:462) 
[3187.268920][T30669] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3187.269150][T30669] ? bus_to_subsys (drivers/base/bus.c:85) 
[3187.269370][T30669] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3187.269589][T30669] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3187.269814][T30669] __device_attach (drivers/base/dd.c:1030) 
[3187.270036][T30669] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3187.270267][T30669] ? bus_to_subsys (drivers/base/bus.c:85) 
[3187.270496][T30669] ? 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) 
[3187.270723][T30669] bus_probe_device (drivers/base/bus.c:537) 
[3187.270952][T30669] device_add (drivers/base/core.c:3672) 
[3187.271186][T30669] ? __pfx_device_add (drivers/base/core.c:3548) 
[3187.271408][T30669] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3187.271638][T30669] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3187.271920][T30669] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3187.272223][T30669] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3187.272442][T30669] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3187.272668][T30669] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3187.272886][T30669] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3187.273122][T30669] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3187.273303][T30669] ? __pfx_vfs_write (fs/read_write.c:660) 
[3187.273530][T30669] ? __lock_release (kernel/locking/lockdep.c:5527) 
[3187.273747][T30669] ? 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) 
[3187.273985][T30669] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[3187.274221][T30669] ksys_write (fs/read_write.c:731) 
[3187.274396][T30669] ? __pfx_ksys_write (fs/read_write.c:721) 
[3187.274616][T30669] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[3187.274847][T30669] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3187.275079][T30669] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3187.275352][T30669] RIP: 0033:0x7f4da6c18b77
[ 3187.275588][T30669] 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
[ 3187.276326][T30669] RSP: 002b:00007fffd1a30be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3187.276658][T30669] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f4da6c18b77
[ 3187.276986][T30669] RDX: 0000000000000002 RSI: 0000559749a83760 RDI: 0000000000000001
[ 3187.277318][T30669] RBP: 0000559749a83760 R08: 0000000000000000 R09: 00007f4da6c8b4e0
[ 3187.277643][T30669] R10: 00007f4da6c8b3e0 R11: 0000000000000246 R12: 0000000000000002
[ 3187.277967][T30669] R13: 00007f4da6cd4760 R14: 0000000000000002 R15: 00007f4da6ccf9c0
| [ 3194.304751][T30669] ------------[ cut here ]------------
| [3194.305286][T30669] WARNING: CPU: 1 PID: 30669 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:10596) 
| [ 3194.305736][T30669] Modules linked in: netdevsim macsec ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xfrm_user geneve vxlan act_csum act_pedit cls_flower sch_prio openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh [last unloaded: netdevsim]
| [ 3194.307427][T30669] Tainted: [W]=WARN
[ 3194.307628][T30669] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3194.307904][T30669] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 3194.308199][T30669] Code: 00 e8 13 47 fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf d0 0c 00 00 be ff ff ff ff e8 98 5f 99 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:	13 47 fe             	adc    -0x2(%rdi),%eax
   5:	ff 48 8b             	decl   -0x75(%rax)
   8:	5c                   	pop    %rsp
   9:	24 58                	and    $0x58,%al
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf d0 0c 00 00 	lea    0xcd0(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 98 5f 99 00       	call   0x995fb9
  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
[ 3194.308980][T30669] RSP: 0018:ffffc900058c7528 EFLAGS: 00010246
[ 3194.309280][T30669] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3194.309612][T30669] RDX: 0000000000000000 RSI: ffff888015772cd0 RDI: ffff888009fd0b78
[ 3194.309946][T30669] RBP: ffffffffad053580 R08: 0000000000000000 R09: fffffbfff55c2504
[ 3194.310292][T30669] R10: ffffffffaae12827 R11: ffff888009fd0040 R12: 0000000000000000
[ 3194.310635][T30669] R13: ffff888015772130 R14: ffff888015772008 R15: ffff888015772000
[ 3194.310965][T30669] FS:  00007f4da6ad7740(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[ 3194.311554][T30669] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3194.311840][T30669] CR2: 00007f1aa726fde0 CR3: 00000000157a6004 CR4: 0000000000772ef0
[ 3194.312194][T30669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3194.312537][T30669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3194.312873][T30669] PKRU: 55555554
[ 3194.313047][T30669] Call Trace:
[ 3194.313230][T30669]  <TASK>
[3194.313349][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3194.313582][T30669] ? __warn (kernel/panic.c:748) 
[3194.313758][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3194.313987][T30669] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3194.314229][T30669] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3194.314408][T30669] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3194.314640][T30669] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3194.314883][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3194.315119][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[3194.315344][T30669] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[3194.315626][T30669] ? _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) 
[3194.315857][T30669] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3194.316099][T30669] register_netdevice (net/core/dev.c:11033) 
[3194.316335][T30669] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[3194.316561][T30669] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3194.316803][T30669] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3194.317049][T30669] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3194.317350][T30669] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3194.317531][T30669] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3194.317832][T30669] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3194.318139][T30669] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3194.318435][T30669] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3194.318675][T30669] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3194.318963][T30669] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3194.319234][T30669] ? 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)) 
[3194.319405][T30669] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3194.319639][T30669] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3194.319869][T30669] __driver_probe_device (drivers/base/dd.c:800) 
[3194.320105][T30669] driver_probe_device (drivers/base/dd.c:830) 
[3194.320332][T30669] __device_attach_driver (drivers/base/dd.c:959) 
[3194.320560][T30669] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3194.320842][T30669] bus_for_each_drv (drivers/base/bus.c:462) 
[3194.321077][T30669] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3194.321300][T30669] ? bus_to_subsys (drivers/base/bus.c:85) 
[3194.321529][T30669] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3194.321751][T30669] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3194.321983][T30669] __device_attach (drivers/base/dd.c:1030) 
[3194.322228][T30669] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3194.322458][T30669] ? bus_to_subsys (drivers/base/bus.c:85) 
[3194.322682][T30669] ? 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) 
[3194.322915][T30669] bus_probe_device (drivers/base/bus.c:537) 
[3194.323153][T30669] device_add (drivers/base/core.c:3672) 
[3194.323382][T30669] ? __pfx_device_add (drivers/base/core.c:3548) 
[3194.323604][T30669] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3194.323841][T30669] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3194.324147][T30669] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3194.324439][T30669] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3194.324662][T30669] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3194.324892][T30669] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3194.325123][T30669] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3194.325353][T30669] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3194.325562][T30669] ? __pfx_vfs_write (fs/read_write.c:660) 
[3194.325799][T30669] ? __lock_release (kernel/locking/lockdep.c:5527) 
[3194.326021][T30669] ? 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) 
[3194.326269][T30669] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[3194.326502][T30669] ksys_write (fs/read_write.c:731) 
[3194.326674][T30669] ? __pfx_ksys_write (fs/read_write.c:721) 
[3194.326904][T30669] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[3194.327161][T30669] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3194.327399][T30669] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3194.327682][T30669] RIP: 0033:0x7f4da6c18b77
[ 3194.327917][T30669] 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
[ 3194.328700][T30669] RSP: 002b:00007fffd1a317c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3194.329050][T30669] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f4da6c18b77
[ 3194.329395][T30669] RDX: 0000000000000005 RSI: 0000559749a83760 RDI: 0000000000000001
[ 3194.329735][T30669] RBP: 0000559749a83760 R08: 0000000000000000 R09: 00007f4da6c8b4e0
[ 3194.330072][T30669] R10: 00007f4da6c8b3e0 R11: 0000000000000246 R12: 0000000000000005
[ 3194.330412][T30669] R13: 00007f4da6cd4760 R14: 0000000000000005 R15: 00007f4da6ccf9c0
| [ 3194.351822][T30669] ------------[ cut here ]------------
| [3194.352318][T30669] WARNING: CPU: 1 PID: 30669 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:10596) 
| [ 3194.352763][T30669] Modules linked in: netdevsim macsec ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xfrm_user geneve vxlan act_csum act_pedit cls_flower sch_prio openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh [last unloaded: netdevsim]
| [ 3194.354467][T30669] Tainted: [W]=WARN
[ 3194.354637][T30669] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3194.354913][T30669] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 3194.355204][T30669] Code: 00 e8 13 47 fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf d0 0c 00 00 be ff ff ff ff e8 98 5f 99 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:	13 47 fe             	adc    -0x2(%rdi),%eax
   5:	ff 48 8b             	decl   -0x75(%rax)
   8:	5c                   	pop    %rsp
   9:	24 58                	and    $0x58,%al
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf d0 0c 00 00 	lea    0xcd0(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 98 5f 99 00       	call   0x995fb9
  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
[ 3194.355982][T30669] RSP: 0018:ffffc900058c7528 EFLAGS: 00010246
[ 3194.356275][T30669] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3194.356608][T30669] RDX: 0000000000000000 RSI: ffff8880131e2cd0 RDI: ffff888009fd0b78
[ 3194.356944][T30669] RBP: ffffffffad053580 R08: 0000000000000000 R09: fffffbfff55c2504
[ 3194.357294][T30669] R10: ffffffffaae12827 R11: ffff888009fd0040 R12: 0000000000000000
[ 3194.357626][T30669] R13: ffff8880131e2130 R14: ffff8880131e2008 R15: ffff8880131e2000
[ 3194.357956][T30669] FS:  00007f4da6ad7740(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[ 3194.358357][T30669] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3194.358638][T30669] CR2: 00007f4da6c78c8c CR3: 00000000157a6004 CR4: 0000000000772ef0
[ 3194.358970][T30669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3194.359468][T30669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3194.359798][T30669] PKRU: 55555554
[ 3194.359974][T30669] Call Trace:
[ 3194.360154][T30669]  <TASK>
[3194.360271][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3194.360497][T30669] ? __warn (kernel/panic.c:748) 
[3194.360672][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3194.360902][T30669] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3194.361143][T30669] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3194.361320][T30669] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3194.361544][T30669] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3194.361791][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[3194.362024][T30669] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[3194.362270][T30669] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[3194.362555][T30669] ? _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) 
[3194.362787][T30669] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3194.363019][T30669] register_netdevice (net/core/dev.c:11033) 
[3194.363265][T30669] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[3194.363491][T30669] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3194.363729][T30669] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3194.363970][T30669] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3194.364268][T30669] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3194.364444][T30669] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3194.364744][T30669] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3194.365034][T30669] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3194.365387][T30669] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3194.365626][T30669] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3194.365909][T30669] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3194.366146][T30669] ? 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)) 
[3194.366318][T30669] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3194.366561][T30669] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3194.366792][T30669] __driver_probe_device (drivers/base/dd.c:800) 
[3194.367018][T30669] driver_probe_device (drivers/base/dd.c:830) 
[3194.367253][T30669] __device_attach_driver (drivers/base/dd.c:959) 
[3194.367478][T30669] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3194.367751][T30669] bus_for_each_drv (drivers/base/bus.c:462) 
[3194.367977][T30669] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3194.368210][T30669] ? bus_to_subsys (drivers/base/bus.c:85) 
[3194.368434][T30669] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3194.368655][T30669] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3194.368882][T30669] __device_attach (drivers/base/dd.c:1030) 
[3194.369116][T30669] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3194.369338][T30669] ? bus_to_subsys (drivers/base/bus.c:85) 
[3194.369560][T30669] ? 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) 
[3194.369792][T30669] bus_probe_device (drivers/base/bus.c:537) 
[3194.370019][T30669] device_add (drivers/base/core.c:3672) 
[3194.370258][T30669] ? __pfx_device_add (drivers/base/core.c:3548) 
[3194.370479][T30669] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3194.370716][T30669] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3194.371001][T30669] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3194.371299][T30669] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3194.371525][T30669] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3194.371754][T30669] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3194.371973][T30669] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3194.372218][T30669] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3194.372397][T30669] ? __pfx_vfs_write (fs/read_write.c:660) 
[3194.372621][T30669] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[3194.372848][T30669] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3194.373092][T30669] ksys_write (fs/read_write.c:731) 
[3194.373264][T30669] ? __pfx_ksys_write (fs/read_write.c:721) 
[3194.373496][T30669] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3194.373719][T30669] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3194.373991][T30669] RIP: 0033:0x7f4da6c18b77
[ 3194.374227][T30669] 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
[ 3194.374989][T30669] RSP: 002b:00007fffd1a31a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3194.375329][T30669] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f4da6c18b77
[ 3194.375655][T30669] RDX: 0000000000000005 RSI: 0000559749a83760 RDI: 0000000000000001
[ 3194.375977][T30669] RBP: 0000559749a83760 R08: 0000000000000000 R09: 00007f4da6c8b4e0
[ 3194.376316][T30669] R10: 00007f4da6c8b3e0 R11: 0000000000000246 R12: 0000000000000005


Finger prints:
__netdev_update_features:register_netdevice:nsim_create:__nsim_dev_port_add:nsim_dev_port_add_all