======================================
| 0
| xx__-> [  243.830271][ T2485] ------------[ cut here ]------------
| [ 243.830919][ T2485] WARNING: CPU: 2 PID: 2485 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) 
| [  243.831420][ T2485] Modules linked in: netdevsim psample sch_etf sch_fq act_mirred cls_matchall ip6_gre gre ipt_rpfilter nft_compat nf_tables cls_bpf act_gact cls_flower sch_ingress
[  243.832764][ T2485] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 243.833070][ T2485] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.833372][ T2485] 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
[  243.834156][ T2485] RSP: 0018:ffffc90000857528 EFLAGS: 00010246
[  243.834451][ T2485] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  243.834793][ T2485] RDX: 0000000000000000 RSI: ffff8880105bacd0 RDI: ffff88800fd00b78
[  243.835149][ T2485] RBP: ffffffff9c653580 R08: 0000000000000000 R09: fffffbfff3482504
[  243.835500][ T2485] R10: ffffffff9a412827 R11: ffff88800fd00040 R12: 0000000000000000
[  243.835845][ T2485] R13: ffff8880105ba130 R14: ffff8880105ba008 R15: ffff8880105ba000
[  243.836194][ T2485] FS:  00007fdd3a6df740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  243.836590][ T2485] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  243.836885][ T2485] CR2: 00005648d442ff88 CR3: 000000000c6a2004 CR4: 0000000000772ef0
[  243.837239][ T2485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  243.837587][ T2485] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  243.837927][ T2485] PKRU: 55555554
[  243.838123][ T2485] Call Trace:
[  243.838310][ T2485]  <TASK>
[ 243.838444][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.838686][ T2485] ? __warn (kernel/panic.c:748) 
[ 243.838872][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.839122][ T2485] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 243.839362][ T2485] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 243.839543][ T2485] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 243.839776][ T2485] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 243.840035][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.840272][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 243.840510][ T2485] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 243.840802][ T2485] ? _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) 
[ 243.841052][ T2485] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 243.841292][ T2485] register_netdevice (net/core/dev.c:11003) 
[ 243.841536][ T2485] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 243.841770][ T2485] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 243.842032][ T2485] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 243.842282][ T2485] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 243.842575][ T2485] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 243.842761][ T2485] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 243.843071][ T2485] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 243.843367][ T2485] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 243.843670][ T2485] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 243.843916][ T2485] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 243.844219][ T2485] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 243.844454][ T2485] ? 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)) 
[ 243.844636][ T2485] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 243.844879][ T2485] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 243.845138][ T2485] __driver_probe_device (drivers/base/dd.c:800) 
[ 243.845375][ T2485] driver_probe_device (drivers/base/dd.c:830) 
[ 243.845613][ T2485] __device_attach_driver (drivers/base/dd.c:959) 
[ 243.845849][ T2485] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 243.846143][ T2485] bus_for_each_drv (drivers/base/bus.c:462) 
[ 243.846431][ T2485] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 243.846666][ T2485] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 243.846908][ T2485] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 243.847151][ T2485] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 243.847390][ T2485] __device_attach (drivers/base/dd.c:1030) 
[ 243.847622][ T2485] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 243.847852][ T2485] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 243.848092][ T2485] ? 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) 
[ 243.848335][ T2485] bus_probe_device (drivers/base/bus.c:537) 
[ 243.848574][ T2485] device_add (drivers/base/core.c:3672) 
[ 243.848813][ T2485] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 243.849065][ T2485] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 243.849316][ T2485] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 243.849614][ T2485] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 243.849913][ T2485] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 243.850156][ T2485] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 243.850399][ T2485] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 243.850631][ T2485] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 243.850871][ T2485] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 243.851069][ T2485] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 243.851307][ T2485] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 243.851539][ T2485] ? 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) 
[ 243.851779][ T2485] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 243.852029][ T2485] ksys_write (fs/read_write.c:731) 
[ 243.852214][ T2485] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 243.852447][ T2485] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 243.852690][ T2485] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 243.852928][ T2485] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  243.853218][ T2485] RIP: 0033:0x7fdd3a820b77
[ 243.853463][ T2485] 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
[  243.854239][ T2485] RSP: 002b:00007ffdb5d6fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  243.854583][ T2485] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fdd3a820b77
[  243.854922][ T2485] RDX: 0000000000000004 RSI: 00005648d442ef80 RDI: 0000000000000001
[  243.855277][ T2485] RBP: 00005648d442ef80 R08: 0000000000000003 R09: 0000000000000000
[  243.855614][ T2485] R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000004
[  243.855953][ T2485] R13: 00007fdd3a8dc760 R14: 0000000000000004 R15: 00007fdd3a8d79c0
| [  243.883702][ T2485] ------------[ cut here ]------------
| [ 243.884242][ T2485] WARNING: CPU: 3 PID: 2485 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) 
| [  243.884683][ T2485] Modules linked in: netdevsim psample sch_etf sch_fq act_mirred cls_matchall ip6_gre gre ipt_rpfilter nft_compat nf_tables cls_bpf act_gact cls_flower sch_ingress
| [  243.886124][ T2485] Tainted: [W]=WARN
[  243.886315][ T2485] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 243.886590][ T2485] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.886878][ T2485] 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
[  243.887649][ T2485] RSP: 0018:ffffc90000857528 EFLAGS: 00010246
[  243.887930][ T2485] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  243.888267][ T2485] RDX: 0000000000000000 RSI: ffff88801138acd0 RDI: ffff88800fd00b78
[  243.888603][ T2485] RBP: ffffffff9c653580 R08: 0000000000000000 R09: fffffbfff3482504
[  243.888926][ T2485] R10: ffffffff9a412827 R11: ffff88800fd00040 R12: 0000000000000000
[  243.889271][ T2485] R13: ffff88801138a130 R14: ffff88801138a008 R15: ffff88801138a000
[  243.889600][ T2485] FS:  00007fdd3a6df740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  243.889993][ T2485] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  243.890264][ T2485] CR2: 000055a902364498 CR3: 000000000c6a2003 CR4: 0000000000772ef0
[  243.890592][ T2485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  243.890919][ T2485] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  243.891258][ T2485] PKRU: 55555554
[  243.891429][ T2485] Call Trace:
[  243.891598][ T2485]  <TASK>
[ 243.891712][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.891933][ T2485] ? __warn (kernel/panic.c:748) 
[ 243.892113][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.892339][ T2485] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 243.892568][ T2485] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 243.892744][ T2485] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 243.892978][ T2485] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 243.893218][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 243.893440][ T2485] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 243.893667][ T2485] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 243.893952][ T2485] ? _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) 
[ 243.894199][ T2485] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 243.894432][ T2485] register_netdevice (net/core/dev.c:11003) 
[ 243.894660][ T2485] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 243.894884][ T2485] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 243.895134][ T2485] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 243.895370][ T2485] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 243.895650][ T2485] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 243.895824][ T2485] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 243.896122][ T2485] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 243.896407][ T2485] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 243.896689][ T2485] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 243.896920][ T2485] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 243.897208][ T2485] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 243.897434][ T2485] ? 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)) 
[ 243.897602][ T2485] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 243.897830][ T2485] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 243.898070][ T2485] __driver_probe_device (drivers/base/dd.c:800) 
[ 243.898292][ T2485] driver_probe_device (drivers/base/dd.c:830) 
[ 243.898514][ T2485] __device_attach_driver (drivers/base/dd.c:959) 
[ 243.898734][ T2485] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 243.899020][ T2485] bus_for_each_drv (drivers/base/bus.c:462) 
[ 243.899251][ T2485] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 243.899471][ T2485] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 243.899695][ T2485] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 243.899917][ T2485] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 243.900159][ T2485] __device_attach (drivers/base/dd.c:1030) 
[ 243.900386][ T2485] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 243.900612][ T2485] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 243.900834][ T2485] ? 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) 
[ 243.901072][ T2485] bus_probe_device (drivers/base/bus.c:537) 
[ 243.901299][ T2485] device_add (drivers/base/core.c:3672) 
[ 243.901524][ T2485] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 243.901747][ T2485] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 243.901997][ T2485] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 243.902287][ T2485] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 243.902583][ T2485] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 243.902803][ T2485] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 243.903045][ T2485] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 243.903267][ T2485] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 243.903497][ T2485] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 243.903677][ T2485] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 243.903908][ T2485] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 243.904154][ T2485] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 243.904383][ T2485] ksys_write (fs/read_write.c:731) 
[ 243.904558][ T2485] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 243.904792][ T2485] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 243.905034][ T2485] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  243.905311][ T2485] RIP: 0033:0x7fdd3a820b77
[ 243.905536][ T2485] 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
[  243.906318][ T2485] RSP: 002b:00007ffdb5d6fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  243.906653][ T2485] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fdd3a820b77
[  243.906996][ T2485] RDX: 0000000000000004 RSI: 00005648d442ef80 RDI: 0000000000000001
[  243.907325][ T2485] RBP: 00005648d442ef80 R08: 0000000000000000 R09: 00007fdd3a8934e0
[  243.907652][ T2485] R10: 00007fdd3a8933e0 R11: 0000000000000246 R12: 0000000000000004


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