======================================
| 0
| xx__-> [  856.233816][T10430] ------------[ cut here ]------------
| [856.234262][T10430] WARNING: CPU: 2 PID: 10430 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) 
| [  856.234861][T10430] Modules linked in: netdevsim psample unix_diag ipt_rpfilter act_mirred act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables sctp_diag sctp vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_gact cls_flower sch_ingress vxlan
[  856.237125][T10430] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[856.237402][T10430] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 856.237702][T10430] Code: 00 e8 d3 48 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 3b 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:	d3 48 fe             	rorl   %cl,-0x2(%rax)
   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 3b 99 00       	call   0x993bb9
  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
[  856.238447][T10430] RSP: 0018:ffffc90000d37528 EFLAGS: 00010246
[  856.238742][T10430] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  856.239068][T10430] RDX: 0000000000000000 RSI: ffff8880103d2cd0 RDI: ffff88800b628b78
[  856.239397][T10430] RBP: ffffffffad853580 R08: 0000000000000000 R09: fffffbfff56c2504
[  856.239746][T10430] R10: ffffffffab612827 R11: ffff88800b628040 R12: 0000000000000000
[  856.240076][T10430] R13: ffff8880103d2130 R14: ffff8880103d2008 R15: ffff8880103d2000
[  856.240407][T10430] FS:  00007f35641b81c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  856.240798][T10430] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  856.241087][T10430] CR2: 00007f3556ab8930 CR3: 000000000d95e004 CR4: 0000000000772ef0
[  856.241417][T10430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  856.241758][T10430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  856.242087][T10430] PKRU: 55555554
[  856.242263][T10430] Call Trace:
[  856.242440][T10430]  <TASK>
[856.242567][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[856.242810][T10430] ? __warn (kernel/panic.c:748) 
[856.242992][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[856.243217][T10430] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[856.243449][T10430] ? handle_bug (arch/x86/kernel/traps.c:285) 
[856.243643][T10430] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[856.243870][T10430] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[856.244292][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[856.244527][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[856.244774][T10430] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[856.245057][T10430] ? _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) 
[856.245289][T10430] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[856.245523][T10430] register_netdevice (net/core/dev.c:11003) 
[856.245778][T10430] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[856.246007][T10430] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[856.246248][T10430] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[856.246485][T10430] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[856.246780][T10430] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[856.246959][T10430] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[856.247250][T10430] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[856.247533][T10430] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[856.247834][T10430] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[856.248070][T10430] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[856.248352][T10430] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[856.248578][T10430] ? 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)) 
[856.248766][T10430] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[856.249000][T10430] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[856.249238][T10430] __driver_probe_device (drivers/base/dd.c:800) 
[856.249465][T10430] driver_probe_device (drivers/base/dd.c:830) 
[856.249703][T10430] __device_attach_driver (drivers/base/dd.c:959) 
[856.249931][T10430] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[856.250205][T10430] bus_for_each_drv (drivers/base/bus.c:462) 
[856.250430][T10430] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[856.250665][T10430] ? bus_to_subsys (drivers/base/bus.c:85) 
[856.250895][T10430] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[856.251121][T10430] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[856.251351][T10430] __device_attach (drivers/base/dd.c:1030) 
[856.251583][T10430] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[856.251817][T10430] ? bus_to_subsys (drivers/base/bus.c:85) 
[856.252042][T10430] ? 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) 
[856.252274][T10430] bus_probe_device (drivers/base/bus.c:537) 
[856.252506][T10430] device_add (drivers/base/core.c:3672) 
[856.252747][T10430] ? __pfx_device_add (drivers/base/core.c:3548) 
[856.252968][T10430] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[856.253205][T10430] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[856.253488][T10430] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[856.253789][T10430] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[856.254019][T10430] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[856.254255][T10430] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[856.254475][T10430] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[856.254718][T10430] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[856.254901][T10430] ? __pfx_vfs_write (fs/read_write.c:660) 
[856.255132][T10430] ? __lock_release (kernel/locking/lockdep.c:5527) 
[856.255354][T10430] ? 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) 
[856.255587][T10430] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[856.255832][T10430] ksys_write (fs/read_write.c:731) 
[856.256013][T10430] ? __pfx_ksys_write (fs/read_write.c:721) 
[856.256238][T10430] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[856.256472][T10430] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[856.256710][T10430] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  856.256981][T10430] RIP: 0033:0x7f35643d2b77
[ 856.257216][T10430] 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
[  856.257967][T10430] RSP: 002b:00007ffe18e99cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  856.258302][T10430] RAX: ffffffffffffffda RBX: 00007f35641b8140 RCX: 00007f35643d2b77
[  856.258639][T10430] RDX: 0000000000000009 RSI: 000055efbc93ce20 RDI: 0000000000000006
[  856.258973][T10430] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  856.259298][T10430] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35560f54c0
[  856.259638][T10430] R13: 000055efbc93ce20 R14: 0000000000000006 R15: 000055efbc717900
| [  859.383096][T10430] ------------[ cut here ]------------
| [859.383532][T10430] WARNING: CPU: 3 PID: 10430 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) 
| [  859.383978][T10430] Modules linked in: netdevsim psample unix_diag ipt_rpfilter act_mirred act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables sctp_diag sctp vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_gact cls_flower sch_ingress vxlan
| [  859.385711][T10430] Tainted: [W]=WARN
[  859.385899][T10430] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[859.386169][T10430] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 859.386443][T10430] Code: 00 e8 d3 48 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 3b 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:	d3 48 fe             	rorl   %cl,-0x2(%rax)
   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 3b 99 00       	call   0x993bb9
  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
[  859.387183][T10430] RSP: 0018:ffffc90000d37528 EFLAGS: 00010246
[  859.387450][T10430] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  859.387778][T10430] RDX: 0000000000000000 RSI: ffff88800d852cd0 RDI: ffff88800b628b78
[  859.388093][T10430] RBP: ffffffffad853580 R08: 0000000000000000 R09: fffffbfff56c2504
[  859.388406][T10430] R10: ffffffffab612827 R11: ffff88800b628040 R12: 0000000000000000
[  859.388908][T10430] R13: ffff88800d852130 R14: ffff88800d852008 R15: ffff88800d852000
[  859.389225][T10430] FS:  00007f35641b81c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  859.389590][T10430] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  859.389868][T10430] CR2: 00007f53459c8a00 CR3: 000000000d95e006 CR4: 0000000000772ef0
[  859.390184][T10430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  859.390498][T10430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  859.390821][T10430] PKRU: 55555554
[  859.390981][T10430] Call Trace:
[  859.391139][T10430]  <TASK>
[859.391248][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[859.391462][T10430] ? __warn (kernel/panic.c:748) 
[859.391638][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[859.391852][T10430] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[859.392069][T10430] ? handle_bug (arch/x86/kernel/traps.c:285) 
[859.392232][T10430] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[859.392442][T10430] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[859.392678][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[859.392896][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[859.393116][T10430] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[859.393383][T10430] ? _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) 
[859.393618][T10430] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[859.393839][T10430] register_netdevice (net/core/dev.c:11003) 
[859.394067][T10430] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[859.394276][T10430] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[859.394502][T10430] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[859.394742][T10430] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[859.395019][T10430] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[859.395219][T10430] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[859.395498][T10430] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[859.395782][T10430] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[859.396054][T10430] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[859.396278][T10430] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[859.396545][T10430] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[859.396776][T10430] ? 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)) 
[859.396939][T10430] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[859.397161][T10430] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[859.397381][T10430] __driver_probe_device (drivers/base/dd.c:800) 
[859.397596][T10430] driver_probe_device (drivers/base/dd.c:830) 
[859.397827][T10430] __device_attach_driver (drivers/base/dd.c:959) 
[859.398043][T10430] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[859.398307][T10430] bus_for_each_drv (drivers/base/bus.c:462) 
[859.398521][T10430] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[859.398743][T10430] ? bus_to_subsys (drivers/base/bus.c:85) 
[859.398953][T10430] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[859.399162][T10430] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[859.399380][T10430] __device_attach (drivers/base/dd.c:1030) 
[859.399592][T10430] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[859.399817][T10430] ? bus_to_subsys (drivers/base/bus.c:85) 
[859.400029][T10430] ? 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) 
[859.400249][T10430] bus_probe_device (drivers/base/bus.c:537) 
[859.400464][T10430] device_add (drivers/base/core.c:3672) 
[859.400690][T10430] ? __pfx_device_add (drivers/base/core.c:3548) 
[859.400901][T10430] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[859.401128][T10430] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[859.401401][T10430] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[859.401692][T10430] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[859.401903][T10430] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[859.402119][T10430] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[859.402327][T10430] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[859.402545][T10430] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[859.402727][T10430] ? __pfx_vfs_write (fs/read_write.c:660) 
[859.402936][T10430] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[859.403164][T10430] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[859.403437][T10430] ksys_write (fs/read_write.c:731) 
[859.403601][T10430] ? __pfx_ksys_write (fs/read_write.c:721) 
[859.403825][T10430] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[859.404054][T10430] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[859.404269][T10430] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  859.404528][T10430] RIP: 0033:0x7f35643d2b77
[ 859.404774][T10430] Code: Unable to access opcode bytes at 0x7f35643d2b4d.

Code starting with the faulting instruction
===========================================
[  859.405048][T10430] RSP: 002b:00007ffe18e99d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  859.405362][T10430] RAX: ffffffffffffffda RBX: 00007f35641b8140 RCX: 00007f35643d2b77
[  859.405682][T10430] RDX: 000000000000000a RSI: 000055efbc940d30 RDI: 0000000000000006
[  859.405992][T10430] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000000000
[  859.406304][T10430] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35560f5700
[  859.406626][T10430] R13: 000055efbc940d30 R14: 0000000000000006 R15: 000055efbc717900
| [  861.874356][T10430] ------------[ cut here ]------------
| [861.874720][T10430] WARNING: CPU: 0 PID: 10430 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) 
| [  861.875276][T10430] Modules linked in: netdevsim psample unix_diag ipt_rpfilter act_mirred act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables sctp_diag sctp vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_gact cls_flower sch_ingress vxlan
| [  861.877200][T10430] Tainted: [W]=WARN
[  861.877368][T10430] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[861.877647][T10430] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 861.877924][T10430] Code: 00 e8 d3 48 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 3b 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:	d3 48 fe             	rorl   %cl,-0x2(%rax)
   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 3b 99 00       	call   0x993bb9
  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
[  861.878663][T10430] RSP: 0018:ffffc90000d37528 EFLAGS: 00010246
[  861.878930][T10430] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  861.879247][T10430] RDX: 0000000000000000 RSI: ffff888009bcacd0 RDI: ffff88800b628b78
[  861.879559][T10430] RBP: ffffffffad853580 R08: 0000000000000000 R09: fffffbfff56c2504
[  861.879878][T10430] R10: ffffffffab612827 R11: ffff88800b628040 R12: 0000000000000000
[  861.880200][T10430] R13: ffff888009bca130 R14: ffff888009bca008 R15: ffff888009bca000
[  861.880519][T10430] FS:  00007f35641b81c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[  861.880898][T10430] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  861.881162][T10430] CR2: 00007f53459c8a00 CR3: 000000000d95e004 CR4: 0000000000772ef0
[  861.881476][T10430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  861.881796][T10430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  861.882111][T10430] PKRU: 55555554
[  861.882270][T10430] Call Trace:
[  861.882429][T10430]  <TASK>
[861.882538][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[861.882760][T10430] ? __warn (kernel/panic.c:748) 
[861.882927][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[861.883142][T10430] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[861.883360][T10430] ? handle_bug (arch/x86/kernel/traps.c:285) 
[861.883523][T10430] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[861.883745][T10430] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[861.883983][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[861.884196][T10430] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[861.884412][T10430] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[861.884692][T10430] ? _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) 
[861.884909][T10430] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[861.885129][T10430] register_netdevice (net/core/dev.c:11003) 
[861.885349][T10430] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[861.885559][T10430] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[861.885793][T10430] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[861.886019][T10430] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[861.886294][T10430] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[861.886465][T10430] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[861.886751][T10430] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[861.887024][T10430] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[861.887299][T10430] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[861.887524][T10430] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[861.887808][T10430] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[861.888024][T10430] ? 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)) 
[861.888189][T10430] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[861.888410][T10430] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[861.888638][T10430] __driver_probe_device (drivers/base/dd.c:800) 
[861.888854][T10430] driver_probe_device (drivers/base/dd.c:830) 
[861.889068][T10430] __device_attach_driver (drivers/base/dd.c:959) 
[861.889285][T10430] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[861.889545][T10430] bus_for_each_drv (drivers/base/bus.c:462) 
[861.889773][T10430] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[861.889989][T10430] ? bus_to_subsys (drivers/base/bus.c:85) 
[861.890204][T10430] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[861.890415][T10430] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[861.890640][T10430] __device_attach (drivers/base/dd.c:1030) 
[861.890856][T10430] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[861.891068][T10430] ? bus_to_subsys (drivers/base/bus.c:85) 
[861.891280][T10430] ? 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) 
[861.891502][T10430] bus_probe_device (drivers/base/bus.c:537) 
[861.891731][T10430] device_add (drivers/base/core.c:3672) 
[861.891946][T10430] ? __pfx_device_add (drivers/base/core.c:3548) 
[861.892155][T10430] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[861.892432][T10430] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[861.892716][T10430] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[861.892992][T10430] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[861.893201][T10430] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[861.893419][T10430] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[861.893635][T10430] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[861.893878][T10430] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[861.894064][T10430] ? __pfx_vfs_write (fs/read_write.c:660) 
[861.894274][T10430] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[861.894499][T10430] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[861.894781][T10430] ksys_write (fs/read_write.c:731) 
[861.894945][T10430] ? __pfx_ksys_write (fs/read_write.c:721) 
[861.895157][T10430] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[861.895377][T10430] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[861.895595][T10430] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  861.895866][T10430] RIP: 0033:0x7f35643d2b77
[ 861.896084][T10430] 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
[  861.896811][T10430] RSP: 002b:00007ffe18e99d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  861.897131][T10430] RAX: ffffffffffffffda RBX: 00007f35641b8140 RCX: 00007f35643d2b77
[  861.897442][T10430] RDX: 0000000000000009 RSI: 000055efbc940d30 RDI: 0000000000000006
[  861.897763][T10430] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  861.898078][T10430] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35560f5700


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