======================================
| 0
| xx__-> [ 4474.519489][T17183] ------------[ cut here ]------------
| [4474.519894][T17183] WARNING: CPU: 3 PID: 17183 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) 
| [ 4474.520556][T17183] Modules linked in: netdevsim psample sctp_diag sctp xt_mark act_mirred cls_basic sch_fq_codel act_gact cls_flower sch_ingress vxlan sha1_generic xfrm_user xt_policy nft_compat nf_tables
[ 4474.521808][T17183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[4474.522120][T17183] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 4474.522442][T17183] 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
[ 4474.523271][T17183] RSP: 0018:ffffc90008947528 EFLAGS: 00010246
[ 4474.523574][T17183] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4474.523928][T17183] RDX: 0000000000000000 RSI: ffff888005df2cd0 RDI: ffff88801d7dd0f8
[ 4474.524290][T17183] RBP: ffffffff89a53580 R08: 0000000000000000 R09: fffffbfff0f02504
[ 4474.524644][T17183] R10: ffffffff87812827 R11: ffff88801d7dc5c0 R12: 0000000000000000
[ 4474.524995][T17183] R13: ffff888005df2130 R14: ffff888005df2008 R15: ffff888005df2000
[ 4474.525366][T17183] FS:  00007f5556f581c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[ 4474.525780][T17183] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4474.526806][T17183] CR2: 00007f5549925770 CR3: 0000000013642004 CR4: 0000000000772ef0
[ 4474.527208][T17183] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4474.527559][T17183] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4474.527904][T17183] PKRU: 55555554
[ 4474.528095][T17183] Call Trace:
[ 4474.528297][T17183]  <TASK>
[4474.528425][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4474.528669][T17183] ? __warn (kernel/panic.c:748) 
[4474.528849][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4474.529103][T17183] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[4474.529346][T17183] ? handle_bug (arch/x86/kernel/traps.c:285) 
[4474.529525][T17183] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[4474.529758][T17183] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[4474.530004][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4474.530250][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[4474.530497][T17183] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[4474.530792][T17183] ? _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) 
[4474.531039][T17183] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[4474.531294][T17183] register_netdevice (net/core/dev.c:11033) 
[4474.531535][T17183] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[4474.531765][T17183] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[4474.532008][T17183] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[4474.532269][T17183] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[4474.532610][T17183] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[4474.532793][T17183] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[4474.533112][T17183] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[4474.533419][T17183] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[4474.533718][T17183] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[4474.533967][T17183] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[4474.534277][T17183] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[4474.534515][T17183] ? 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)) 
[4474.534696][T17183] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[4474.534942][T17183] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[4474.535187][T17183] __driver_probe_device (drivers/base/dd.c:800) 
[4474.535429][T17183] driver_probe_device (drivers/base/dd.c:830) 
[4474.535667][T17183] __device_attach_driver (drivers/base/dd.c:959) 
[4474.535912][T17183] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[4474.536216][T17183] bus_for_each_drv (drivers/base/bus.c:462) 
[4474.536455][T17183] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[4474.536690][T17183] ? bus_to_subsys (drivers/base/bus.c:85) 
[4474.536929][T17183] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4474.537176][T17183] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[4474.537418][T17183] __device_attach (drivers/base/dd.c:1030) 
[4474.537658][T17183] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[4474.537896][T17183] ? bus_to_subsys (drivers/base/bus.c:85) 
[4474.538143][T17183] ? 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) 
[4474.538389][T17183] bus_probe_device (drivers/base/bus.c:537) 
[4474.538630][T17183] device_add (drivers/base/core.c:3672) 
[4474.538871][T17183] ? __pfx_device_add (drivers/base/core.c:3548) 
[4474.539117][T17183] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[4474.539372][T17183] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[4474.539676][T17183] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[4474.539980][T17183] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4474.540224][T17183] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[4474.540470][T17183] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4474.540701][T17183] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[4474.540940][T17183] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[4474.541138][T17183] ? __pfx_vfs_write (fs/read_write.c:660) 
[4474.541384][T17183] ? __lock_release (kernel/locking/lockdep.c:5527) 
[4474.541619][T17183] ? 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) 
[4474.541865][T17183] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[4474.542122][T17183] ksys_write (fs/read_write.c:731) 
[4474.542309][T17183] ? __pfx_ksys_write (fs/read_write.c:721) 
[4474.542560][T17183] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[4474.542810][T17183] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4474.543063][T17183] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4474.543352][T17183] RIP: 0033:0x7f5557172b77
[ 4474.543582][T17183] 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
[ 4474.544377][T17183] RSP: 002b:00007ffd86785848 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4474.544722][T17183] RAX: ffffffffffffffda RBX: 00007f5556f58140 RCX: 00007f5557172b77
[ 4474.545062][T17183] RDX: 0000000000000008 RSI: 0000556d809eb480 RDI: 0000000000000006
[ 4474.545400][T17183] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[ 4474.545729][T17183] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f5549010340
[ 4474.546078][T17183] R13: 0000556d809eb480 R14: 0000000000000006 R15: 0000556d807c2900
| [ 4477.829346][T17183] ------------[ cut here ]------------
| [4477.829804][T17183] WARNING: CPU: 1 PID: 17183 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) 
| [ 4477.830304][T17183] Modules linked in: netdevsim psample sctp_diag sctp xt_mark act_mirred cls_basic sch_fq_codel act_gact cls_flower sch_ingress vxlan sha1_generic xfrm_user xt_policy nft_compat nf_tables
| [ 4477.831602][T17183] Tainted: [W]=WARN
[ 4477.831808][T17183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[4477.832110][T17183] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 4477.832410][T17183] 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
[ 4477.833217][T17183] RSP: 0018:ffffc90008947528 EFLAGS: 00010246
[ 4477.833506][T17183] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4477.833851][T17183] RDX: 0000000000000000 RSI: ffff88800e4facd0 RDI: ffff88801d7dd0f8
[ 4477.834610][T17183] RBP: ffffffff89a53580 R08: 0000000000000000 R09: fffffbfff0f02504
[ 4477.834957][T17183] R10: ffffffff87812827 R11: ffff88801d7dc5c0 R12: 0000000000000000
[ 4477.835324][T17183] R13: ffff88800e4fa130 R14: ffff88800e4fa008 R15: ffff88800e4fa000
[ 4477.835663][T17183] FS:  00007f5556f581c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[ 4477.836057][T17183] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4477.836331][T17183] CR2: 00007f75a6fe0a00 CR3: 0000000013642002 CR4: 0000000000772ef0
[ 4477.836644][T17183] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4477.836967][T17183] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4477.837303][T17183] PKRU: 55555554
[ 4477.837463][T17183] Call Trace:
[ 4477.837633][T17183]  <TASK>
[4477.837749][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4477.837972][T17183] ? __warn (kernel/panic.c:748) 
[4477.838177][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4477.838413][T17183] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[4477.838637][T17183] ? handle_bug (arch/x86/kernel/traps.c:285) 
[4477.838812][T17183] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[4477.839039][T17183] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[4477.839275][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4477.839485][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[4477.839719][T17183] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[4477.839990][T17183] ? _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) 
[4477.840227][T17183] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[4477.840455][T17183] register_netdevice (net/core/dev.c:11033) 
[4477.840681][T17183] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[4477.840894][T17183] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[4477.841147][T17183] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[4477.841385][T17183] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[4477.841698][T17183] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[4477.841863][T17183] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[4477.842175][T17183] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[4477.842498][T17183] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[4477.842789][T17183] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[4477.843038][T17183] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[4477.843318][T17183] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[4477.843537][T17183] ? 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)) 
[4477.843704][T17183] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[4477.843929][T17183] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[4477.844168][T17183] __driver_probe_device (drivers/base/dd.c:800) 
[4477.844381][T17183] driver_probe_device (drivers/base/dd.c:830) 
[4477.844605][T17183] __device_attach_driver (drivers/base/dd.c:959) 
[4477.844828][T17183] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[4477.845118][T17183] bus_for_each_drv (drivers/base/bus.c:462) 
[4477.845342][T17183] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[4477.845549][T17183] ? bus_to_subsys (drivers/base/bus.c:85) 
[4477.845770][T17183] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4477.845977][T17183] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[4477.846238][T17183] __device_attach (drivers/base/dd.c:1030) 
[4477.846463][T17183] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[4477.846688][T17183] ? bus_to_subsys (drivers/base/bus.c:85) 
[4477.846908][T17183] ? 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) 
[4477.847151][T17183] bus_probe_device (drivers/base/bus.c:537) 
[4477.847365][T17183] device_add (drivers/base/core.c:3672) 
[4477.847576][T17183] ? __pfx_device_add (drivers/base/core.c:3548) 
[4477.847783][T17183] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[4477.848006][T17183] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[4477.848299][T17183] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[4477.848571][T17183] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4477.848792][T17183] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[4477.849006][T17183] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4477.849224][T17183] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[4477.849439][T17183] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[4477.849606][T17183] ? __pfx_vfs_write (fs/read_write.c:660) 
[4477.849830][T17183] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[4477.850070][T17183] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[4477.850380][T17183] ksys_write (fs/read_write.c:731) 
[4477.850552][T17183] ? __pfx_ksys_write (fs/read_write.c:721) 
[4477.850770][T17183] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[4477.851000][T17183] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4477.851244][T17183] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4477.851522][T17183] RIP: 0033:0x7f5557172b77
[ 4477.851736][T17183] 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
[ 4477.852486][T17183] RSP: 002b:00007ffd867858e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4477.852802][T17183] RAX: ffffffffffffffda RBX: 00007f5556f58140 RCX: 00007f5557172b77
[ 4477.853126][T17183] RDX: 000000000000000b RSI: 0000556d809ef390 RDI: 0000000000000006
[ 4477.853451][T17183] RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
[ 4477.853758][T17183] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f5548e9a280
[ 4477.854095][T17183] R13: 0000556d809ef390 R14: 0000000000000006 R15: 0000556d807c2900
| [ 4481.311385][T17183] ------------[ cut here ]------------
| [4481.311824][T17183] WARNING: CPU: 3 PID: 17183 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) 
| [ 4481.312385][T17183] Modules linked in: netdevsim psample sctp_diag sctp xt_mark act_mirred cls_basic sch_fq_codel act_gact cls_flower sch_ingress vxlan sha1_generic xfrm_user xt_policy nft_compat nf_tables
| [ 4481.313760][T17183] Tainted: [W]=WARN
[ 4481.313930][T17183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[4481.314214][T17183] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 4481.314501][T17183] 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
[ 4481.315256][T17183] RSP: 0018:ffffc90008947528 EFLAGS: 00010246
[ 4481.315524][T17183] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4481.315836][T17183] RDX: 0000000000000000 RSI: ffff88800ad22cd0 RDI: ffff88801d7dd0f8
[ 4481.316167][T17183] RBP: ffffffff89a53580 R08: 0000000000000000 R09: fffffbfff0f02504
[ 4481.316481][T17183] R10: ffffffff87812827 R11: ffff88801d7dc5c0 R12: 0000000000000000
[ 4481.316796][T17183] R13: ffff88800ad22130 R14: ffff88800ad22008 R15: ffff88800ad22000
[ 4481.317232][T17183] FS:  00007f5556f581c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[ 4481.317606][T17183] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4481.317881][T17183] CR2: 00007f554959e100 CR3: 0000000013642001 CR4: 0000000000772ef0
[ 4481.318278][T17183] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4481.318612][T17183] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4481.318939][T17183] PKRU: 55555554
[ 4481.319109][T17183] Call Trace:
[ 4481.319272][T17183]  <TASK>
[4481.319381][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4481.319596][T17183] ? __warn (kernel/panic.c:748) 
[4481.319781][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4481.320007][T17183] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[4481.320254][T17183] ? handle_bug (arch/x86/kernel/traps.c:285) 
[4481.320427][T17183] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[4481.320648][T17183] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[4481.320896][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[4481.321125][T17183] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[4481.321343][T17183] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[4481.321632][T17183] ? _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) 
[4481.321863][T17183] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[4481.322102][T17183] register_netdevice (net/core/dev.c:11033) 
[4481.322332][T17183] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[4481.322549][T17183] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[4481.322782][T17183] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[4481.323023][T17183] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[4481.323315][T17183] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[4481.323488][T17183] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[4481.323774][T17183] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[4481.324059][T17183] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[4481.324332][T17183] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[4481.324556][T17183] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[4481.324856][T17183] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[4481.325087][T17183] ? 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)) 
[4481.325258][T17183] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[4481.325488][T17183] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[4481.325719][T17183] __driver_probe_device (drivers/base/dd.c:800) 
[4481.325944][T17183] driver_probe_device (drivers/base/dd.c:830) 
[4481.326178][T17183] __device_attach_driver (drivers/base/dd.c:959) 
[4481.326400][T17183] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[4481.326673][T17183] bus_for_each_drv (drivers/base/bus.c:462) 
[4481.326896][T17183] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[4481.327118][T17183] ? bus_to_subsys (drivers/base/bus.c:85) 
[4481.327353][T17183] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4481.327575][T17183] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[4481.327805][T17183] __device_attach (drivers/base/dd.c:1030) 
[4481.328035][T17183] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[4481.328254][T17183] ? bus_to_subsys (drivers/base/bus.c:85) 
[4481.328504][T17183] ? 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) 
[4481.328761][T17183] bus_probe_device (drivers/base/bus.c:537) 
[4481.328983][T17183] device_add (drivers/base/core.c:3672) 
[4481.329216][T17183] ? __pfx_device_add (drivers/base/core.c:3548) 
[4481.329434][T17183] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[4481.329690][T17183] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[4481.329968][T17183] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[4481.330260][T17183] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4481.330481][T17183] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[4481.330707][T17183] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4481.330922][T17183] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[4481.331151][T17183] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[4481.331320][T17183] ? __pfx_vfs_write (fs/read_write.c:660) 
[4481.331530][T17183] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[4481.331752][T17183] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[4481.332032][T17183] ksys_write (fs/read_write.c:731) 
[4481.332199][T17183] ? __pfx_ksys_write (fs/read_write.c:721) 
[4481.332436][T17183] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[4481.332663][T17183] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4481.332882][T17183] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4481.333175][T17183] RIP: 0033:0x7f5557172b77
[ 4481.333405][T17183] 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
[ 4481.334199][T17183] RSP: 002b:00007ffd867858e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4481.334541][T17183] RAX: ffffffffffffffda RBX: 00007f5556f58140 RCX: 00007f5557172b77
[ 4481.334863][T17183] RDX: 0000000000000009 RSI: 0000556d809ef390 RDI: 0000000000000006
[ 4481.335203][T17183] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[ 4481.335510][T17183] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f5548e9a280


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