======================================
| 0
| xx__-> [   13.204125][  T219] ------------[ cut here ]------------
| [ 13.204570][ T219] WARNING: CPU: 1 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) 
| [   13.205064][  T219] Modules linked in: netdevsim
[   13.205835][  T219] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.206121][ T219] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.206407][ 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
[   13.207353][  T219] RSP: 0018:ffffc90000a87548 EFLAGS: 00010246
[   13.207777][  T219] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   13.208138][  T219] RDX: 0000000000000000 RSI: ffff88800a94ac90 RDI: ffff8880092450f8
[   13.208562][  T219] RBP: ffffffffbdd28600 R08: 0000000000000000 R09: fffffbfff777d944
[   13.208891][  T219] R10: ffffffffbbbeca27 R11: ffff8880092445c0 R12: 0000000000000000
[   13.209236][  T219] R13: ffff88800a94a128 R14: ffff88800a94a008 R15: ffff88800a94a000
[   13.209582][  T219] FS:  00007f0b6065d1c0(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   13.209974][  T219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   13.210255][  T219] CR2: 00007f0b52753bf0 CR3: 00000000091d2001 CR4: 0000000000772ef0
[   13.210920][  T219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   13.211251][  T219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   13.211583][  T219] PKRU: 55555554
[   13.211761][  T219] Call Trace:
[   13.211945][  T219]  <TASK>
[ 13.212060][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.212291][ T219] ? __warn (kernel/panic.c:748) 
[ 13.212490][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.212713][ T219] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 13.212937][ T219] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 13.213103][ T219] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 13.213323][ T219] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 13.213576][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.213797][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 13.214022][ T219] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 13.214305][ 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) 
[ 13.214543][ T219] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 13.214772][ T219] register_netdevice (net/core/dev.c:11003) 
[ 13.214998][ T219] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 13.215226][ T219] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 13.215474][ T219] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 13.215768][ T219] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 13.216055][ T219] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 13.216337][ T219] nsim_drv_probe (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 13.216578][ T219] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 13.216876][ T219] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 13.217094][ 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)) 
[ 13.217315][ T219] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 13.217568][ T219] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 13.217829][ T219] __driver_probe_device (drivers/base/dd.c:800) 
[ 13.218070][ T219] driver_probe_device (drivers/base/dd.c:830) 
[ 13.218319][ T219] __device_attach_driver (drivers/base/dd.c:959) 
[ 13.218574][ T219] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 13.218849][ T219] bus_for_each_drv (drivers/base/bus.c:462) 
[ 13.219099][ T219] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 13.219327][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 13.219584][ T219] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 13.219810][ T219] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 13.220059][ T219] __device_attach (drivers/base/dd.c:1030) 
[ 13.220297][ T219] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 13.220546][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 13.220817][ 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) 
[ 13.221068][ T219] bus_probe_device (drivers/base/bus.c:537) 
[ 13.221324][ T219] device_add (drivers/base/core.c:3672) 
[ 13.221585][ T219] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 13.221821][ T219] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 13.222097][ T219] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 13.222406][ T219] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 13.222755][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 13.222989][ T219] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 13.223228][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 13.223469][ T219] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 13.223713][ T219] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 13.223902][ T219] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 13.224126][ T219] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 13.224366][ 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) 
[ 13.224616][ T219] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 13.224849][ T219] ksys_write (fs/read_write.c:731) 
[ 13.225032][ T219] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 13.225277][ T219] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 13.225542][ T219] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 13.225784][ T219] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   13.226081][  T219] RIP: 0033:0x7f0b60877b77
[ 13.226348][ 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
[   13.227184][  T219] RSP: 002b:00007ffdf94427b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   13.227566][  T219] RAX: ffffffffffffffda RBX: 00007f0b6065d140 RCX: 00007f0b60877b77
[   13.227922][  T219] RDX: 0000000000000009 RSI: 000055f0526fef80 RDI: 0000000000000005
[   13.228288][  T219] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   13.228702][  T219] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f0b52669400
[   13.229049][  T219] R13: 000055f0526fef80 R14: 0000000000000005 R15: 000055f052455980
| [   14.380349][  T219] ------------[ cut here ]------------
| [ 14.380969][ T219] WARNING: CPU: 0 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) 
| [   14.382121][  T219] Modules linked in: netdevsim
| [   14.383106][  T219] Tainted: [W]=WARN
[   14.383631][  T219] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.384028][ T219] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.384555][ 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
[   14.385816][  T219] RSP: 0018:ffffc90000a87548 EFLAGS: 00010246
[   14.386297][  T219] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   14.386833][  T219] RDX: 0000000000000000 RSI: ffff88800b872c90 RDI: ffff8880092450f8
[   14.387403][  T219] RBP: ffffffffbdd28600 R08: 0000000000000000 R09: fffffbfff777d944
[   14.387947][  T219] R10: ffffffffbbbeca27 R11: ffff8880092445c0 R12: 0000000000000000
[   14.388507][  T219] R13: ffff88800b872128 R14: ffff88800b872008 R15: ffff88800b872000
[   14.389023][  T219] FS:  00007f0b6065d1c0(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   14.389629][  T219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.389928][  T219] CR2: 00007f0b5302a7c0 CR3: 00000000091d2001 CR4: 0000000000772ef0
[   14.390357][  T219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   14.390859][  T219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   14.391281][  T219] PKRU: 55555554
[   14.391509][  T219] Call Trace:
[   14.391680][  T219]  <TASK>
[ 14.391827][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.392175][ T219] ? __warn (kernel/panic.c:748) 
[ 14.392497][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.392852][ T219] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 14.393206][ T219] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 14.393475][ T219] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 14.393814][ T219] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 14.394179][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.394515][ T219] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 14.394843][ T219] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 14.395282][ 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) 
[ 14.395637][ T219] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 14.395983][ T219] register_netdevice (net/core/dev.c:11003) 
[ 14.396312][ T219] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 14.396728][ T219] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 14.397133][ T219] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 14.397614][ T219] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 14.398062][ T219] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 14.398514][ T219] nsim_drv_probe (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 14.398868][ T219] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 14.399288][ T219] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 14.399663][ 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)) 
[ 14.399915][ T219] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 14.400267][ T219] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 14.400673][ T219] __driver_probe_device (drivers/base/dd.c:800) 
[ 14.401002][ T219] driver_probe_device (drivers/base/dd.c:830) 
[ 14.401320][ T219] __device_attach_driver (drivers/base/dd.c:959) 
[ 14.401678][ T219] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 14.402109][ T219] bus_for_each_drv (drivers/base/bus.c:462) 
[ 14.402442][ T219] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 14.402821][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 14.403153][ T219] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 14.403542][ T219] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 14.403904][ T219] __device_attach (drivers/base/dd.c:1030) 
[ 14.404238][ T219] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 14.404639][ T219] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 14.404964][ 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) 
[ 14.405314][ T219] bus_probe_device (drivers/base/bus.c:537) 
[ 14.405736][ T219] device_add (drivers/base/core.c:3672) 
[ 14.406041][ T219] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 14.406374][ T219] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 14.406749][ T219] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 14.407268][ T219] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 14.407740][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 14.408087][ T219] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 14.408505][ T219] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 14.408857][ T219] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 14.409221][ T219] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 14.409533][ T219] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 14.409901][ T219] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 14.410250][ 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) 
[ 14.410645][ T219] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 14.411014][ T219] ksys_write (fs/read_write.c:731) 
[ 14.411284][ T219] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 14.411673][ T219] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 14.412041][ T219] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 14.412361][ T219] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   14.412833][  T219] RIP: 0033:0x7f0b60877b77
[ 14.413172][ 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
[   14.414415][  T219] RSP: 002b:00007ffdf9442778 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   14.414934][  T219] RAX: ffffffffffffffda RBX: 00007f0b6065d140 RCX: 00007f0b60877b77
[   14.415528][  T219] RDX: 0000000000000009 RSI: 000055f0526fef80 RDI: 0000000000000005
[   14.415990][  T219] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   14.416496][  T219] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f0b52669400
[   14.416939][  T219] R13: 000055f0526fef80 R14: 0000000000000005 R15: 000055f052455980
| [   14.933910][  T236] ------------[ cut here ]------------
| [ 14.934314][ T236] WARNING: CPU: 0 PID: 236 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) 
| [   14.934733][  T236] Modules linked in: netdevsim
| [   14.935571][  T236] Tainted: [W]=WARN
[   14.935732][  T236] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.936040][ T236] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.936301][ T236] 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
[   14.937104][  T236] RSP: 0018:ffffc90000ab71f0 EFLAGS: 00010246
[   14.937474][  T236] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   14.937938][  T236] RDX: 0000000000000000 RSI: ffff88800e5eac90 RDI: ffff888005158b00
[   14.938376][  T236] RBP: ffff8880099e8040 R08: 0000000000000000 R09: fffffbfff777d944
[   14.938883][  T236] R10: ffffffffbbbeca27 R11: ffff888005158040 R12: 0000000000000000
[   14.939359][  T236] R13: ffff88800e5ea128 R14: ffff88800e5ea008 R15: ffff88800e5ea000
[   14.939850][  T236] FS:  00007ff57bf4d800(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   14.940403][  T236] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.940795][  T236] CR2: 00007ff57c08c440 CR3: 00000000023de003 CR4: 0000000000772ef0
[   14.941257][  T236] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   14.941734][  T236] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   14.942190][  T236] PKRU: 55555554
[   14.942427][  T236] Call Trace:
[   14.942679][  T236]  <TASK>
[ 14.942842][ T236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.943190][ T236] ? __warn (kernel/panic.c:748) 
[ 14.943431][ T236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.943773][ T236] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 14.944118][ T236] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 14.944357][ T236] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 14.944699][ T236] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 14.945018][ T236] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.945367][ T236] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 14.945793][ T236] ? _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) 
[ 14.946111][ T236] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 14.946413][ T236] register_netdevice (net/core/dev.c:11003) 
[ 14.946738][ T236] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 14.947068][ T236] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 14.947395][ T236] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 14.947852][ T236] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 14.948296][ T236] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 14.948730][ T236] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 14.949118][ T236] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 14.949543][ T236] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 14.949935][ T236] devlink_reload (net/devlink/dev.c:474) 
[ 14.950240][ T236] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 14.950559][ T236] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 14.950876][ T236] ? cap_capable (security/commoncap.c:131) 
[ 14.951160][ T236] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 14.951404][ T236] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 14.951724][ T236] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 14.952096][ T236] ? __nla_parse (lib/nlattr.c:732) 
[ 14.952406][ T236] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 14.952733][ T236] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 14.953134][ T236] ? cap_capable (security/commoncap.c:131) 
[ 14.953426][ T236] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 14.953752][ T236] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 14.954068][ T236] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 14.954363][ T236] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 14.954797][ T236] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 14.955172][ T236] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 14.955588][ T236] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 14.955890][ T236] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 14.956177][ T236] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 14.956523][ T236] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 14.956839][ T236] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 14.957068][ T236] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 14.957401][ T236] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 14.957760][ T236] genl_rcv (net/netlink/genetlink.c:1220) 
[ 14.957977][ T236] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 14.958272][ T236] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 14.958596][ T236] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 14.958928][ T236] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 14.959262][ T236] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 14.959602][ T236] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 14.959924][ T236] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 14.960280][ T236] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 14.960601][ T236] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 14.960922][ T236] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 14.961254][ T236] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 14.961638][ T236] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 14.962006][ T236] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 14.962431][ T236] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 14.962880][ T236] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 14.963195][ T236] __x64_sys_sendto (net/socket.c:2181) 
[ 14.963512][ T236] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 14.963892][ T236] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 14.964228][ T236] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   14.964667][  T236] RIP: 0033:0x7ff57c159a4a
[ 14.964992][ T236] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[   14.966139][  T236] RSP: 002b:00007ffdce9f08a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   14.966642][  T236] RAX: ffffffffffffffda RBX: 0000000027ec8b00 RCX: 00007ff57c159a4a
[   14.967127][  T236] RDX: 0000000000000040 RSI: 0000000027ec8b00 RDI: 0000000000000003
[   14.967645][  T236] RBP: 0000000027ec8910 R08: 00007ff57c2fd200 R09: 000000000000000c
[   14.968135][  T236] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200


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