======================================
| [   11.817046][  T231] netconsole: network logging started
| [   12.647886][  T219] ------------[ cut here ]------------
| [ 12.648326][ T219] WARNING: CPU: 2 PID: 219 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) 
| [   12.648747][  T219] Modules linked in: netconsole netdevsim
[   12.649322][  T219] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 12.649629][ T219] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.649922][ T219] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 90 0c 00 00 be ff ff ff ff e8 08 e9 78 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:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 90 0c 00 00 	lea    0xc90(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 08 e9 78 00       	call   0x78e929
  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
[   12.650702][  T219] RSP: 0018:ffffc90000ae7548 EFLAGS: 00010246
[   12.651031][  T219] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   12.651381][  T219] RDX: 0000000000000000 RSI: ffff888009d72c90 RDI: ffff88800b5550f8
[   12.651803][  T219] RBP: ffffffffafd28600 R08: 0000000000000000 R09: fffffbfff5b7d944
[   12.652153][  T219] R10: ffffffffadbeca27 R11: ffff88800b5545c0 R12: 0000000000000000
[   12.652551][  T219] R13: ffff888009d72128 R14: ffff888009d72008 R15: ffff888009d72000
[   12.652902][  T219] FS:  00007fbd9ccee740(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   12.653374][  T219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   12.653670][  T219] CR2: 000055c0da87b2a8 CR3: 000000000205c002 CR4: 0000000000772ef0
[   12.654053][  T219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   12.654426][  T219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   12.654933][  T219] PKRU: 55555554
[   12.655113][  T219] Call Trace:
[   12.655319][  T219]  <TASK>
[ 12.655467][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.655691][ T219] ? __warn (kernel/panic.c:748) 
[ 12.655903][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.656164][ T219] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 12.656456][ T219] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 12.656634][ T219] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 12.656854][ T219] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 12.657110][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.657367][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 12.657684][ T219] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 12.657955][ T219] ? _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) 
[ 12.658180][ T219] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 12.658435][ T219] register_netdevice (net/core/dev.c:11003) 
[ 12.658679][ T219] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 12.658931][ T219] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 12.659163][ T219] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 12.659490][ T219] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 12.659777][ T219] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 12.660058][ T219] nsim_drv_probe (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 12.660304][ T219] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 12.660593][ T219] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 12.660817][ T219] ? 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)) 
[ 12.660987][ T219] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 12.661211][ T219] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 12.661485][ T219] __driver_probe_device (drivers/base/dd.c:800) 
[ 12.661709][ T219] driver_probe_device (drivers/base/dd.c:830) 
[ 12.661928][ T219] __device_attach_driver (drivers/base/dd.c:959) 
[ 12.662153][ T219] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 12.662454][ T219] bus_for_each_drv (drivers/base/bus.c:462) 
[ 12.662697][ T219] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 12.662924][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 12.663139][ T219] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 12.663388][ T219] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 12.663609][ T219] __device_attach (drivers/base/dd.c:1030) 
[ 12.663825][ T219] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 12.664046][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 12.664278][ T219] ? 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) 
[ 12.664501][ T219] bus_probe_device (drivers/base/bus.c:537) 
[ 12.664720][ T219] device_add (drivers/base/core.c:3672) 
[ 12.664938][ T219] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 12.665153][ T219] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 12.665392][ T219] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 12.665676][ T219] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 12.665949][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 12.666165][ T219] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 12.666395][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 12.666610][ T219] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 12.666864][ T219] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 12.667040][ T219] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 12.667298][ T219] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 12.667514][ T219] ? 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) 
[ 12.667754][ T219] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 12.667997][ T219] ksys_write (fs/read_write.c:731) 
[ 12.668168][ T219] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 12.668398][ T219] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 12.668636][ T219] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 12.668872][ T219] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   12.669158][  T219] RIP: 0033:0x7fbd9ce2fb77
[ 12.669423][ T219] 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
[   12.670261][  T219] RSP: 002b:00007fffa51db778 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   12.670643][  T219] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fbd9ce2fb77
[   12.670993][  T219] RDX: 0000000000000004 RSI: 00005589076c8110 RDI: 0000000000000001
[   12.671372][  T219] RBP: 00005589076c8110 R08: 0000000000000000 R09: 00007fbd9cea24e0
[   12.671730][  T219] R10: 00007fbd9cea23e0 R11: 0000000000000246 R12: 0000000000000004
[   12.672077][  T219] R13: 00007fbd9ceeb760 R14: 0000000000000004 R15: 00007fbd9cee69c0
| [   12.704157][  T219] ------------[ cut here ]------------
| [ 12.704767][ T219] WARNING: CPU: 2 PID: 219 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) 
| [   12.706138][  T219] Modules linked in: netconsole netdevsim
| [   12.707113][  T219] Tainted: [W]=WARN
[   12.707465][  T219] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 12.707737][ T219] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.708026][ T219] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 90 0c 00 00 be ff ff ff ff e8 08 e9 78 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:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 90 0c 00 00 	lea    0xc90(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 08 e9 78 00       	call   0x78e929
  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
[   12.708876][  T219] RSP: 0018:ffffc90000ae7548 EFLAGS: 00010246
[   12.709200][  T219] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   12.709593][  T219] RDX: 0000000000000000 RSI: ffff888012a72c90 RDI: ffff88800b5550f8
[   12.710101][  T219] RBP: ffffffffafd28600 R08: 0000000000000000 R09: fffffbfff5b7d944
[   12.710505][  T219] R10: ffffffffadbeca27 R11: ffff88800b5545c0 R12: 0000000000000000
[   12.710918][  T219] R13: ffff888012a72128 R14: ffff888012a72008 R15: ffff888012a72000
[   12.711344][  T219] FS:  00007fbd9ccee740(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   12.711929][  T219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   12.712447][  T219] CR2: 00007fefaca8d5a0 CR3: 000000000205c002 CR4: 0000000000772ef0
[   12.713003][  T219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   12.713559][  T219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   12.714107][  T219] PKRU: 55555554
[   12.714426][  T219] Call Trace:
[   12.714722][  T219]  <TASK>
[ 12.714928][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.715340][ T219] ? __warn (kernel/panic.c:748) 
[ 12.715636][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.716017][ T219] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 12.716454][ T219] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 12.716752][ T219] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 12.717109][ T219] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 12.717480][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.717726][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 12.717967][ T219] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 12.718277][ T219] ? _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) 
[ 12.718549][ T219] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 12.718790][ T219] register_netdevice (net/core/dev.c:11003) 
[ 12.719027][ T219] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 12.719281][ T219] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 12.719547][ T219] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 12.719842][ T219] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 12.720144][ T219] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 12.720484][ T219] nsim_drv_probe (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 12.720742][ T219] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 12.721038][ T219] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 12.721449][ T219] ? 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)) 
[ 12.721748][ T219] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 12.722132][ T219] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 12.722547][ T219] __driver_probe_device (drivers/base/dd.c:800) 
[ 12.722939][ T219] driver_probe_device (drivers/base/dd.c:830) 
[ 12.723348][ T219] __device_attach_driver (drivers/base/dd.c:959) 
[ 12.723737][ T219] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 12.724196][ T219] bus_for_each_drv (drivers/base/bus.c:462) 
[ 12.724630][ T219] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 12.725006][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 12.725402][ T219] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 12.725785][ T219] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 12.726178][ T219] __device_attach (drivers/base/dd.c:1030) 
[ 12.726584][ T219] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 12.726969][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 12.727375][ T219] ? 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) 
[ 12.727788][ T219] bus_probe_device (drivers/base/bus.c:537) 
[ 12.728782][ T219] device_add (drivers/base/core.c:3672) 
[ 12.729070][ T219] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 12.729406][ T219] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 12.729666][ T219] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 12.730092][ T219] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 12.730442][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 12.730832][ T219] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 12.731702][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 12.732074][ T219] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 12.732415][ T219] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 12.732606][ T219] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 12.732841][ T219] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 12.733706][ T219] ? _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) 
[ 12.734087][ T219] ? tmigr_handle_remote (kernel/time/timer_migration.c:1059) 
[ 12.734965][ T219] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) 
[ 12.735499][ T219] ksys_write (fs/read_write.c:731) 
[ 12.736051][ T219] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 12.736482][ T219] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 12.736876][ T219] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   12.737602][  T219] RIP: 0033:0x7fbd9ce2fb77
[ 12.738001][ T219] Code: Unable to access opcode bytes at 0x7fbd9ce2fb4d.

Code starting with the faulting instruction
===========================================
[   12.738506][  T219] RSP: 002b:00007fffa51db7a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   12.739174][  T219] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fbd9ce2fb77
[   12.739547][  T219] RDX: 0000000000000004 RSI: 00005589076c8110 RDI: 0000000000000001
[   12.739888][  T219] RBP: 00005589076c8110 R08: 0000000000000000 R09: 00007fbd9cea24e0
[   12.740248][  T219] R10: 00007fbd9cea23e0 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
__netdev_update_features:register_netdevice:nsim_create:__nsim_dev_port_add:nsim_drv_probe