======================================
| 0
| xx__-> [  194.801417][ T2236] ------------[ cut here ]------------
| [ 194.801861][ T2236] WARNING: CPU: 3 PID: 2236 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) 
| [  194.802439][ T2236] Modules linked in: netdevsim psample cls_matchall ip6_gre gre act_mirred act_tunnel_key cls_flower bareudp mpls_gso mpls_iptunnel mpls_router sch_ingress vxlan
[  194.803861][ T2236] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 194.804156][ T2236] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.804512][ T2236] 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
[  194.805390][ T2236] RSP: 0018:ffffc90001697528 EFLAGS: 00010246
[  194.805670][ T2236] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  194.806090][ T2236] RDX: 0000000000000000 RSI: ffff8880108eacd0 RDI: ffff888009e08b78
[  194.806477][ T2236] RBP: ffffffff90253580 R08: 0000000000000000 R09: fffffbfff1c02504
[  194.806832][ T2236] R10: ffffffff8e012827 R11: ffff888009e08040 R12: 0000000000000000
[  194.807259][ T2236] R13: ffff8880108ea130 R14: ffff8880108ea008 R15: ffff8880108ea000
[  194.807690][ T2236] FS:  00007fb3e1b17740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  194.808239][ T2236] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  194.808517][ T2236] CR2: 0000561e9e9b0f88 CR3: 000000000e518002 CR4: 0000000000772ef0
[  194.808964][ T2236] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  194.809326][ T2236] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  194.809660][ T2236] PKRU: 55555554
[  194.809872][ T2236] Call Trace:
[  194.810058][ T2236]  <TASK>
[ 194.810177][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.810437][ T2236] ? __warn (kernel/panic.c:748) 
[ 194.810656][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.810954][ T2236] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 194.811249][ T2236] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 194.811425][ T2236] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 194.811646][ T2236] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 194.811893][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.812183][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 194.812474][ T2236] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 194.812846][ T2236] ? _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) 
[ 194.813128][ T2236] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 194.813358][ T2236] register_netdevice (net/core/dev.c:11033) 
[ 194.813585][ T2236] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 194.813818][ T2236] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 194.814117][ T2236] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 194.814406][ T2236] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 194.814688][ T2236] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 194.814870][ T2236] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 194.815242][ T2236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 194.815607][ T2236] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 194.815981][ T2236] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 194.816211][ T2236] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 194.816485][ T2236] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 194.816801][ T2236] ? 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)) 
[ 194.816992][ T2236] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 194.817219][ T2236] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 194.817483][ T2236] __driver_probe_device (drivers/base/dd.c:800) 
[ 194.817784][ T2236] driver_probe_device (drivers/base/dd.c:830) 
[ 194.818072][ T2236] __device_attach_driver (drivers/base/dd.c:959) 
[ 194.818335][ T2236] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 194.818604][ T2236] bus_for_each_drv (drivers/base/bus.c:462) 
[ 194.818836][ T2236] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 194.819053][ T2236] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 194.819337][ T2236] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 194.819620][ T2236] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 194.819920][ T2236] __device_attach (drivers/base/dd.c:1030) 
[ 194.820161][ T2236] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 194.820380][ T2236] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 194.820619][ T2236] ? 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) 
[ 194.820921][ T2236] bus_probe_device (drivers/base/bus.c:537) 
[ 194.821213][ T2236] device_add (drivers/base/core.c:3672) 
[ 194.821436][ T2236] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 194.821665][ T2236] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 194.821966][ T2236] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 194.822334][ T2236] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 194.822713][ T2236] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 194.822962][ T2236] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 194.823187][ T2236] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 194.823403][ T2236] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 194.823628][ T2236] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 194.823812][ T2236] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 194.824104][ T2236] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 194.824389][ T2236] ? 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) 
[ 194.824681][ T2236] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 194.824981][ T2236] ksys_write (fs/read_write.c:731) 
[ 194.825193][ T2236] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 194.825410][ T2236] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 194.825639][ T2236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 194.825873][ T2236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  194.826197][ T2236] RIP: 0033:0x7fb3e1c58b77
[ 194.826489][ T2236] 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
[  194.827406][ T2236] RSP: 002b:00007ffecdbe4558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  194.827762][ T2236] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fb3e1c58b77
[  194.828094][ T2236] RDX: 0000000000000004 RSI: 0000561e9e9aff80 RDI: 0000000000000001
[  194.828473][ T2236] RBP: 0000561e9e9aff80 R08: 0000000000000003 R09: 0000000000000000
[  194.828909][ T2236] R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000004
[  194.829296][ T2236] R13: 00007fb3e1d14760 R14: 0000000000000004 R15: 00007fb3e1d0f9c0
| [  194.848463][ T2236] ------------[ cut here ]------------
| [ 194.848865][ T2236] WARNING: CPU: 2 PID: 2236 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) 
| [  194.849351][ T2236] Modules linked in: netdevsim psample cls_matchall ip6_gre gre act_mirred act_tunnel_key cls_flower bareudp mpls_gso mpls_iptunnel mpls_router sch_ingress vxlan
| [  194.850587][ T2236] Tainted: [W]=WARN
[  194.850897][ T2236] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 194.851249][ T2236] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.851551][ T2236] 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
[  194.852346][ T2236] RSP: 0018:ffffc90001697528 EFLAGS: 00010246
[  194.852644][ T2236] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  194.852998][ T2236] RDX: 0000000000000000 RSI: ffff888002612cd0 RDI: ffff888009e08b78
[  194.853343][ T2236] RBP: ffffffff90253580 R08: 0000000000000000 R09: fffffbfff1c02504
[  194.853723][ T2236] R10: ffffffff8e012827 R11: ffff888009e08040 R12: 0000000000000000
[  194.854189][ T2236] R13: ffff888002612130 R14: ffff888002612008 R15: ffff888002612000
[  194.854534][ T2236] FS:  00007fb3e1b17740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  194.854958][ T2236] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  194.855255][ T2236] CR2: 00007f4cf78ed000 CR3: 000000000e518005 CR4: 0000000000772ef0
[  194.855600][ T2236] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  194.855961][ T2236] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  194.856309][ T2236] PKRU: 55555554
[  194.856491][ T2236] Call Trace:
[  194.856670][ T2236]  <TASK>
[ 194.856829][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.857074][ T2236] ? __warn (kernel/panic.c:748) 
[ 194.857262][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.857498][ T2236] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 194.857755][ T2236] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 194.857951][ T2236] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 194.858192][ T2236] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 194.858445][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 194.858689][ T2236] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 194.858951][ T2236] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 194.859250][ T2236] ? _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) 
[ 194.859501][ T2236] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 194.859755][ T2236] register_netdevice (net/core/dev.c:11033) 
[ 194.860001][ T2236] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 194.860237][ T2236] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 194.860486][ T2236] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 194.860747][ T2236] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 194.861066][ T2236] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 194.861251][ T2236] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 194.861557][ T2236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 194.861870][ T2236] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 194.862475][ T2236] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 194.862738][ T2236] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 194.863035][ T2236] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 194.863271][ T2236] ? 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)) 
[ 194.863591][ T2236] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 194.863851][ T2236] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 194.864104][ T2236] __driver_probe_device (drivers/base/dd.c:800) 
[ 194.864341][ T2236] driver_probe_device (drivers/base/dd.c:830) 
[ 194.864719][ T2236] __device_attach_driver (drivers/base/dd.c:959) 
[ 194.864962][ T2236] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 194.865265][ T2236] bus_for_each_drv (drivers/base/bus.c:462) 
[ 194.865510][ T2236] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 194.865889][ T2236] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 194.866131][ T2236] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 194.866365][ T2236] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 194.866610][ T2236] __device_attach (drivers/base/dd.c:1030) 
[ 194.867005][ T2236] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 194.867241][ T2236] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 194.867475][ T2236] ? 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) 
[ 194.867731][ T2236] bus_probe_device (drivers/base/bus.c:537) 
[ 194.867975][ T2236] device_add (drivers/base/core.c:3672) 
[ 194.868228][ T2236] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 194.868460][ T2236] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 194.868725][ T2236] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 194.869034][ T2236] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 194.869340][ T2236] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 194.869575][ T2236] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 194.869833][ T2236] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 194.870071][ T2236] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 194.870313][ T2236] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 194.870509][ T2236] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 194.870767][ T2236] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 194.871010][ T2236] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 194.871255][ T2236] ksys_write (fs/read_write.c:731) 
[ 194.871439][ T2236] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 194.871685][ T2236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 194.871944][ T2236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  194.872225][ T2236] RIP: 0033:0x7fb3e1c58b77
[ 194.872472][ T2236] 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
[  194.873404][ T2236] RSP: 002b:00007ffecdbe4558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  194.873758][ T2236] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fb3e1c58b77
[  194.874101][ T2236] RDX: 0000000000000004 RSI: 0000561e9e9aff80 RDI: 0000000000000001
[  194.874444][ T2236] RBP: 0000561e9e9aff80 R08: 0000000000000000 R09: 00007fb3e1ccb4e0
[  194.874933][ T2236] R10: 00007fb3e1ccb3e0 R11: 0000000000000246 R12: 0000000000000004


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