======================================
| 0
| xx__-> [   26.802488][  T516] ------------[ cut here ]------------
| [ 26.803193][ T516] WARNING: CPU: 3 PID: 516 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) 
| [   26.803664][  T516] Modules linked in: netdevsim psample unix_diag
[   26.804303][  T516] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 26.804587][ T516] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 26.804875][ T516] 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
[   26.805643][  T516] RSP: 0018:ffffc90000bd7528 EFLAGS: 00010246
[   26.805924][  T516] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   26.806251][  T516] RDX: 0000000000000000 RSI: ffff8880052dacd0 RDI: ffff88800ad3d0f8
[   26.806597][  T516] RBP: ffffffffa1c53580 R08: 0000000000000000 R09: fffffbfff3f42504
[   26.806923][  T516] R10: ffffffff9fa12827 R11: ffff88800ad3c5c0 R12: 0000000000000000
[   26.807254][  T516] R13: ffff8880052da130 R14: ffff8880052da008 R15: ffff8880052da000
[   26.807589][  T516] FS:  00007efe779021c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[   26.807972][  T516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.808457][  T516] CR2: 000056026e45f9a8 CR3: 000000000afe4003 CR4: 0000000000772ef0
[   26.808801][  T516] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.809135][  T516] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.809475][  T516] PKRU: 55555554
[   26.809652][  T516] Call Trace:
[   26.809837][  T516]  <TASK>
[ 26.809961][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 26.810185][ T516] ? __warn (kernel/panic.c:748) 
[ 26.810365][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 26.810592][ T516] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 26.810822][ T516] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 26.810990][ T516] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 26.811209][ T516] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 26.811441][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 26.811677][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 26.811905][ T516] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 26.812187][ T516] ? _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) 
[ 26.812411][ T516] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 26.812645][ T516] register_netdevice (net/core/dev.c:11003) 
[ 26.812876][ T516] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 26.813093][ T516] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 26.813326][ T516] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 26.813578][ T516] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 26.813860][ T516] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 26.814032][ T516] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 26.814320][ T516] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 26.814608][ T516] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 26.814893][ T516] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 26.815129][ T516] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 26.815408][ T516] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 26.815640][ T516] ? 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)) 
[ 26.815810][ T516] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 26.816038][ T516] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 26.816262][ T516] __driver_probe_device (drivers/base/dd.c:800) 
[ 26.816484][ T516] driver_probe_device (drivers/base/dd.c:830) 
[ 26.816724][ T516] __device_attach_driver (drivers/base/dd.c:959) 
[ 26.816950][ T516] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 26.817219][ T516] bus_for_each_drv (drivers/base/bus.c:462) 
[ 26.817440][ T516] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 26.817666][ T516] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 26.817884][ T516] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 26.818102][ T516] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 26.818333][ T516] __device_attach (drivers/base/dd.c:1030) 
[ 26.818553][ T516] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 26.818777][ T516] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 26.818998][ T516] ? 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) 
[ 26.819225][ T516] bus_probe_device (drivers/base/bus.c:537) 
[ 26.819449][ T516] device_add (drivers/base/core.c:3672) 
[ 26.819686][ T516] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 26.819908][ T516] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 26.820137][ T516] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 26.820416][ T516] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 26.820710][ T516] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 26.820927][ T516] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 26.821152][ T516] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 26.821369][ T516] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 26.821613][ T516] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 26.821794][ T516] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 26.822019][ T516] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 26.822235][ T516] ? 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) 
[ 26.822470][ T516] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 26.822705][ T516] ksys_write (fs/read_write.c:731) 
[ 26.822873][ T516] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 26.823094][ T516] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 26.823327][ T516] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 26.823548][ T516] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   26.823830][  T516] RIP: 0033:0x7efe77b1cb77
[ 26.824059][ T516] 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
[   26.824933][  T516] RSP: 002b:00007ffdec762c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   26.825289][  T516] RAX: ffffffffffffffda RBX: 00007efe77902140 RCX: 00007efe77b1cb77
[   26.825623][  T516] RDX: 0000000000000009 RSI: 000055d23c1f21a0 RDI: 0000000000000006
[   26.825948][  T516] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   26.826283][  T516] R10: 0000000000000002 R11: 0000000000000246 R12: 00007efe699ba340
[   26.826628][  T516] R13: 000055d23c1f21a0 R14: 0000000000000006 R15: 000055d23bfc9900
| [   30.111846][  T516] ------------[ cut here ]------------
| [ 30.112336][ T516] WARNING: CPU: 2 PID: 516 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) 
| [   30.112812][  T516] Modules linked in: netdevsim psample unix_diag
| [   30.113505][  T516] Tainted: [W]=WARN
[   30.113731][  T516] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 30.114014][ T516] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 30.114305][ T516] 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
[   30.115079][  T516] RSP: 0018:ffffc90000bd7528 EFLAGS: 00010246
[   30.115371][  T516] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   30.115718][  T516] RDX: 0000000000000000 RSI: ffff8880052e2cd0 RDI: ffff88800ad3d0f8
[   30.116057][  T516] RBP: ffffffffa1c53580 R08: 0000000000000000 R09: fffffbfff3f42504
[   30.116653][  T516] R10: ffffffff9fa12827 R11: ffff88800ad3c5c0 R12: 0000000000000000
[   30.116991][  T516] R13: ffff8880052e2130 R14: ffff8880052e2008 R15: ffff8880052e2000
[   30.117328][  T516] FS:  00007efe779021c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[   30.117884][  T516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.118172][  T516] CR2: 00000000004060bb CR3: 000000000afe4002 CR4: 0000000000772ef0
[   30.118509][  T516] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.118859][  T516] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.119198][  T516] PKRU: 55555554
[   30.119376][  T516] Call Trace:
[   30.119552][  T516]  <TASK>
[ 30.119692][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 30.119926][ T516] ? __warn (kernel/panic.c:748) 
[ 30.120109][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 30.120344][ T516] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 30.120591][ T516] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 30.120774][ T516] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 30.121006][ T516] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 30.121258][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 30.121490][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 30.121750][ T516] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 30.122038][ T516] ? _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) 
[ 30.122281][ T516] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 30.122521][ T516] register_netdevice (net/core/dev.c:11003) 
[ 30.122773][ T516] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 30.123006][ T516] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 30.123255][ T516] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 30.123506][ T516] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 30.123825][ T516] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 30.124008][ T516] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 30.124322][ T516] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 30.124629][ T516] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 30.124926][ T516] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 30.125171][ T516] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 30.125482][ T516] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 30.125752][ T516] ? 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)) 
[ 30.125935][ T516] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 30.126178][ T516] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 30.126417][ T516] __driver_probe_device (drivers/base/dd.c:800) 
[ 30.126664][ T516] driver_probe_device (drivers/base/dd.c:830) 
[ 30.126897][ T516] __device_attach_driver (drivers/base/dd.c:959) 
[ 30.127139][ T516] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 30.127415][ T516] bus_for_each_drv (drivers/base/bus.c:462) 
[ 30.127659][ T516] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 30.127885][ T516] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 30.128115][ T516] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 30.128370][ T516] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 30.128626][ T516] __device_attach (drivers/base/dd.c:1030) 
[ 30.128862][ T516] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 30.129100][ T516] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 30.129333][ T516] ? 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) 
[ 30.129583][ T516] bus_probe_device (drivers/base/bus.c:537) 
[ 30.129820][ T516] device_add (drivers/base/core.c:3672) 
[ 30.130055][ T516] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 30.130285][ T516] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 30.130526][ T516] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 30.130838][ T516] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 30.131140][ T516] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 30.131371][ T516] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 30.131618][ T516] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 30.131861][ T516] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 30.132099][ T516] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 30.132289][ T516] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 30.132519][ T516] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 30.132776][ T516] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 30.133065][ T516] ksys_write (fs/read_write.c:731) 
[ 30.133248][ T516] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 30.133478][ T516] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 30.133731][ T516] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.133972][ T516] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.134252][  T516] RIP: 0033:0x7efe77b1cb77
[ 30.134504][ T516] 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
[   30.135280][  T516] RSP: 002b:00007ffdec762ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   30.135631][  T516] RAX: ffffffffffffffda RBX: 00007efe77902140 RCX: 00007efe77b1cb77
[   30.135965][  T516] RDX: 0000000000000009 RSI: 000055d23c1f60b0 RDI: 0000000000000006
[   30.136298][  T516] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   30.136649][  T516] R10: 0000000000000002 R11: 0000000000000246 R12: 00007efe69844280
[   30.136981][  T516] R13: 000055d23c1f60b0 R14: 0000000000000006 R15: 000055d23bfc9900
| [   33.889849][  T516] ------------[ cut here ]------------
| [ 33.890288][ T516] WARNING: CPU: 0 PID: 516 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) 
| [   33.890738][  T516] Modules linked in: netdevsim psample unix_diag
| [   33.891577][  T516] Tainted: [W]=WARN
[   33.891743][  T516] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 33.892006][ T516] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.892274][ T516] 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
[   33.892999][  T516] RSP: 0018:ffffc90000bd7528 EFLAGS: 00010246
[   33.893263][  T516] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   33.893584][  T516] RDX: 0000000000000000 RSI: ffff888005b52cd0 RDI: ffff88800ad3d0f8
[   33.893893][  T516] RBP: ffffffffa1c53580 R08: 0000000000000000 R09: fffffbfff3f42504
[   33.894199][  T516] R10: ffffffff9fa12827 R11: ffff88800ad3c5c0 R12: 0000000000000000
[   33.894505][  T516] R13: ffff888005b52130 R14: ffff888005b52008 R15: ffff888005b52000
[   33.894827][  T516] FS:  00007efe779021c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[   33.895186][  T516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.895444][  T516] CR2: 00007f0b19be95a0 CR3: 000000000afe4002 CR4: 0000000000772ef0
[   33.895761][  T516] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.896071][  T516] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.896383][  T516] PKRU: 55555554
[   33.896547][  T516] Call Trace:
[   33.896713][  T516]  <TASK>
[ 33.896826][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.897039][ T516] ? __warn (kernel/panic.c:748) 
[ 33.897205][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.897415][ T516] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 33.897641][ T516] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 33.897803][ T516] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 33.898011][ T516] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 33.898232][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.898441][ T516] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 33.898669][ T516] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 33.898935][ T516] ? _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) 
[ 33.899150][ T516] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 33.899371][ T516] register_netdevice (net/core/dev.c:11003) 
[ 33.899598][ T516] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 33.899806][ T516] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 33.900040][ T516] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 33.900267][ T516] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 33.900530][ T516] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 33.900707][ T516] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 33.900983][ T516] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 33.901249][ T516] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 33.901518][ T516] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 33.901754][ T516] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 33.902019][ T516] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 33.902231][ T516] ? 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)) 
[ 33.902391][ T516] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 33.902622][ T516] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 33.902847][ T516] __driver_probe_device (drivers/base/dd.c:800) 
[ 33.903058][ T516] driver_probe_device (drivers/base/dd.c:830) 
[ 33.903270][ T516] __device_attach_driver (drivers/base/dd.c:959) 
[ 33.903481][ T516] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 33.903750][ T516] bus_for_each_drv (drivers/base/bus.c:462) 
[ 33.903964][ T516] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 33.904172][ T516] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 33.904379][ T516] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 33.904592][ T516] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 33.904812][ T516] __device_attach (drivers/base/dd.c:1030) 
[ 33.905022][ T516] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 33.905229][ T516] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 33.905435][ T516] ? 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) 
[ 33.905664][ T516] bus_probe_device (drivers/base/bus.c:537) 
[ 33.905877][ T516] device_add (drivers/base/core.c:3672) 
[ 33.906089][ T516] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 33.906298][ T516] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 33.906522][ T516] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 33.906796][ T516] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 33.907068][ T516] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 33.907277][ T516] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 33.907494][ T516] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 33.907710][ T516] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 33.907927][ T516] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 33.908094][ T516] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 33.908300][ T516] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 33.908523][ T516] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 33.908803][ T516] ksys_write (fs/read_write.c:731) 
[ 33.908967][ T516] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 33.909175][ T516] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 33.909397][ T516] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.909619][ T516] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.909873][  T516] RIP: 0033:0x7efe77b1cb77
[ 33.910085][ T516] 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
[   33.910823][  T516] RSP: 002b:00007ffdec762ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   33.911136][  T516] RAX: ffffffffffffffda RBX: 00007efe77902140 RCX: 00007efe77b1cb77
[   33.911443][  T516] RDX: 0000000000000009 RSI: 000055d23c1f60b0 RDI: 0000000000000006
[   33.911767][  T516] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   33.912077][  T516] R10: 0000000000000002 R11: 0000000000000246 R12: 00007efe69844280


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