======================================
| xx__-> [   71.466939][ T1461] ip (1461) used greatest stack depth: 24560 bytes left
| [   71.576633][ T1462] ------------[ cut here ]------------
| [ 71.576991][ T1462] WARNING: CPU: 3 PID: 1462 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) 
| [   71.577425][ T1462] Modules linked in: netdevsim psample sctp [last unloaded: test_bpf]
[   71.578202][ T1462] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 71.578468][ T1462] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 71.578737][ T1462] 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
[   71.579569][ T1462] RSP: 0018:ffffc90000567528 EFLAGS: 00010246
[   71.579837][ T1462] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   71.580234][ T1462] RDX: 0000000000000000 RSI: ffff888010f5acd0 RDI: ffff8880026250f8
[   71.580545][ T1462] RBP: ffff888005225500 R08: 0000000000000000 R09: fffffbfff6c82504
[   71.580859][ T1462] R10: ffffffffb6412827 R11: ffff8880026245c0 R12: 0000000000000000
[   71.581180][ T1462] R13: ffff888010f5a130 R14: ffff888010f5a008 R15: ffff888010f5a000
[   71.581493][ T1462] FS:  00007f5a33108740(0000) GS:ffff888065b80000(0000) knlGS:0000000000000000
[   71.581957][ T1462] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   71.582240][ T1462] CR2: 0000559d6b63f2f8 CR3: 000000000d71a006 CR4: 0000000000772ef0
[   71.582559][ T1462] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   71.582873][ T1462] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   71.583225][ T1462] PKRU: 55555554
[   71.583388][ T1462] Call Trace:
[   71.583553][ T1462]  <TASK>
[ 71.583664][ T1462] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 71.583876][ T1462] ? __warn (kernel/panic.c:748) 
[ 71.584036][ T1462] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 71.584259][ T1462] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 71.584476][ T1462] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 71.584635][ T1462] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 71.584855][ T1462] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 71.585090][ T1462] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 71.585299][ T1462] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 71.585513][ T1462] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 71.585775][ T1462] ? _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) 
[ 71.585992][ T1462] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 71.586222][ T1462] register_netdevice (net/core/dev.c:11003) 
[ 71.586454][ T1462] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 71.586659][ T1462] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 71.586879][ T1462] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 71.587125][ T1462] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 71.587395][ T1462] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 71.587555][ T1462] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 71.587830][ T1462] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 71.588110][ T1462] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 71.588378][ T1462] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 71.588597][ T1462] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 71.588864][ T1462] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 71.589085][ T1462] ? 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)) 
[ 71.589246][ T1462] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 71.589464][ T1462] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 71.589678][ T1462] __driver_probe_device (drivers/base/dd.c:800) 
[ 71.589887][ T1462] driver_probe_device (drivers/base/dd.c:830) 
[ 71.590121][ T1462] __device_attach_driver (drivers/base/dd.c:959) 
[ 71.590337][ T1462] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 71.590594][ T1462] bus_for_each_drv (drivers/base/bus.c:462) 
[ 71.590801][ T1462] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 71.591007][ T1462] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 71.591229][ T1462] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 71.591438][ T1462] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 71.591652][ T1462] __device_attach (drivers/base/dd.c:1030) 
[ 71.591863][ T1462] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 71.592086][ T1462] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 71.592296][ T1462] ? 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) 
[ 71.592510][ T1462] bus_probe_device (drivers/base/bus.c:537) 
[ 71.592720][ T1462] device_add (drivers/base/core.c:3672) 
[ 71.592930][ T1462] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 71.593162][ T1462] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 71.593401][ T1462] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 71.593675][ T1462] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 71.593945][ T1462] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 71.594171][ T1462] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 71.594384][ T1462] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 71.594595][ T1462] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 71.594814][ T1462] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 71.594984][ T1462] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 71.595223][ T1462] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 71.595429][ T1462] ? 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) 
[ 71.595644][ T1462] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 71.595858][ T1462] ksys_write (fs/read_write.c:731) 
[ 71.596017][ T1462] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 71.596241][ T1462] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 71.596461][ T1462] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 71.596675][ T1462] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   71.596930][ T1462] RIP: 0033:0x7f5a33249b77
[ 71.597161][ T1462] 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
[   71.597883][ T1462] RSP: 002b:00007ffc979e0c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   71.598215][ T1462] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f5a33249b77
[   71.598526][ T1462] RDX: 0000000000000007 RSI: 0000559d6b63e2f0 RDI: 0000000000000001
[   71.598835][ T1462] RBP: 0000559d6b63e2f0 R08: 0000000000000006 R09: 0000000000000077
[   71.599166][ T1462] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   71.599480][ T1462] R13: 00007f5a33305760 R14: 0000000000000007 R15: 00007f5a333009c0
| [   86.763696][ T1508] ------------[ cut here ]------------
| [ 86.764056][ T1508] WARNING: CPU: 0 PID: 1508 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) 
| [   86.764473][ T1508] Modules linked in: drop_monitor act_gact cls_flower sch_ingress netdevsim psample sctp [last unloaded: test_bpf]
| [   86.765493][ T1508] Tainted: [W]=WARN
[   86.765697][ T1508] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 86.765959][ T1508] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 86.766484][ T1508] 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
[   86.767317][ T1508] RSP: 0018:ffffc90000647528 EFLAGS: 00010246
[   86.767586][ T1508] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   86.767898][ T1508] RDX: 0000000000000000 RSI: ffff88800d9cacd0 RDI: ffff88800b8b0b78
[   86.768290][ T1508] RBP: ffff8880052238c0 R08: 0000000000000000 R09: fffffbfff6c82504
[   86.768601][ T1508] R10: ffffffffb6412827 R11: ffff88800b8b0040 R12: 0000000000000000
[   86.768910][ T1508] R13: ffff88800d9ca130 R14: ffff88800d9ca008 R15: ffff88800d9ca000
[   86.769228][ T1508] FS:  00007f06df9b3740(0000) GS:ffff888065a00000(0000) knlGS:0000000000000000
[   86.769584][ T1508] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   86.769852][ T1508] CR2: 0000556bcceb92f8 CR3: 0000000010fee001 CR4: 0000000000772ef0
[   86.770170][ T1508] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   86.770480][ T1508] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   86.770787][ T1508] PKRU: 55555554
[   86.770944][ T1508] Call Trace:
[   86.771109][ T1508]  <TASK>
[ 86.771220][ T1508] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 86.771430][ T1508] ? __warn (kernel/panic.c:748) 
[ 86.771593][ T1508] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 86.771805][ T1508] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 86.772021][ T1508] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 86.772194][ T1508] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 86.772407][ T1508] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 86.772635][ T1508] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 86.772848][ T1508] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 86.773077][ T1508] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 86.773344][ T1508] ? _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) 
[ 86.773560][ T1508] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 86.773777][ T1508] register_netdevice (net/core/dev.c:11003) 
[ 86.773999][ T1508] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 86.774218][ T1508] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 86.774443][ T1508] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 86.774667][ T1508] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 86.774932][ T1508] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 86.775107][ T1508] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 86.775380][ T1508] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 86.775653][ T1508] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 86.775923][ T1508] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 86.776158][ T1508] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 86.776422][ T1508] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 86.776631][ T1508] ? 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)) 
[ 86.776792][ T1508] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 86.777012][ T1508] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 86.777241][ T1508] __driver_probe_device (drivers/base/dd.c:800) 
[ 86.777455][ T1508] driver_probe_device (drivers/base/dd.c:830) 
[ 86.777665][ T1508] __device_attach_driver (drivers/base/dd.c:959) 
[ 86.777876][ T1508] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 86.778143][ T1508] bus_for_each_drv (drivers/base/bus.c:462) 
[ 86.778356][ T1508] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 86.778567][ T1508] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 86.778774][ T1508] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 86.778999][ T1508] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 86.779227][ T1508] __device_attach (drivers/base/dd.c:1030) 
[ 86.779439][ T1508] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 86.779646][ T1508] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 86.779865][ T1508] ? 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) 
[ 86.780108][ T1508] bus_probe_device (drivers/base/bus.c:537) 
[ 86.780322][ T1508] device_add (drivers/base/core.c:3672) 
[ 86.780535][ T1508] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 86.780742][ T1508] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 86.780960][ T1508] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 86.781244][ T1508] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 86.781516][ T1508] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 86.781726][ T1508] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 86.781938][ T1508] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 86.782154][ T1508] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 86.782369][ T1508] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 86.782535][ T1508] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 86.782748][ T1508] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 86.782954][ T1508] ? 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) 
[ 86.783182][ T1508] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 86.783398][ T1508] ksys_write (fs/read_write.c:731) 
[ 86.783558][ T1508] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 86.783765][ T1508] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 86.783982][ T1508] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 86.784225][ T1508] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   86.784485][ T1508] RIP: 0033:0x7f06dfaf4b77
[ 86.784697][ T1508] 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
[   86.785424][ T1508] RSP: 002b:00007ffd00e62898 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   86.785736][ T1508] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f06dfaf4b77
[   86.786051][ T1508] RDX: 0000000000000007 RSI: 0000556bcceb82f0 RDI: 0000000000000001
[   86.786362][ T1508] RBP: 0000556bcceb82f0 R08: 0000000000000006 R09: 0000000000000077
[   86.786668][ T1508] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007


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