======================================
| 0
| xx__-> [   10.778647][  T250] ------------[ cut here ]------------
| [ 10.778998][ T250] WARNING: CPU: 3 PID: 250 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) 
| [   10.779431][  T250] Modules linked in: netdevsim psample
[   10.780068][  T250] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.780326][ T250] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.780595][ T250] 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
[   10.781310][  T250] RSP: 0018:ffffc90000c37528 EFLAGS: 00010246
[   10.781572][  T250] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.781881][  T250] RDX: 0000000000000000 RSI: ffff8880053aacd0 RDI: ffff88800c530b78
[   10.782290][  T250] RBP: ffffffff98653580 R08: 0000000000000000 R09: fffffbfff2c82504
[   10.782595][  T250] R10: ffffffff96412827 R11: ffff88800c530040 R12: 0000000000000000
[   10.782903][  T250] R13: ffff8880053aa130 R14: ffff8880053aa008 R15: ffff8880053aa000
[   10.783305][  T250] FS:  00007f5b32c391c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[   10.783658][  T250] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.783914][  T250] CR2: 00007f5b256561f0 CR3: 000000000a9b4006 CR4: 0000000000772ef0
[   10.784325][  T250] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.784636][  T250] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.784958][  T250] PKRU: 55555554
[   10.785116][  T250] Call Trace:
[   10.785275][  T250]  <TASK>
[ 10.785389][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.785596][ T250] ? __warn (kernel/panic.c:748) 
[ 10.785757][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.785972][ T250] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.786182][ T250] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.786338][ T250] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.786543][ T250] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.786762][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.786976][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 10.787190][ T250] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.787449][ T250] ? _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) 
[ 10.787659][ T250] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.787877][ T250] register_netdevice (net/core/dev.c:11003) 
[ 10.788140][ T250] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.788346][ T250] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 10.788568][ T250] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.788786][ T250] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.789055][ T250] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 10.789214][ T250] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.789480][ T250] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.789739][ T250] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 10.790010][ T250] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 10.790229][ T250] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 10.790485][ T250] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 10.790690][ T250] ? 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)) 
[ 10.790844][ T250] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 10.791063][ T250] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 10.791274][ T250] __driver_probe_device (drivers/base/dd.c:800) 
[ 10.791483][ T250] driver_probe_device (drivers/base/dd.c:830) 
[ 10.791688][ T250] __device_attach_driver (drivers/base/dd.c:959) 
[ 10.791894][ T250] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 10.792151][ T250] bus_for_each_drv (drivers/base/bus.c:462) 
[ 10.792359][ T250] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 10.792560][ T250] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.792762][ T250] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.792978][ T250] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 10.793187][ T250] __device_attach (drivers/base/dd.c:1030) 
[ 10.793391][ T250] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 10.793595][ T250] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.793798][ T250] ? 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) 
[ 10.794021][ T250] bus_probe_device (drivers/base/bus.c:537) 
[ 10.794228][ T250] device_add (drivers/base/core.c:3672) 
[ 10.794438][ T250] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 10.794644][ T250] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 10.794859][ T250] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 10.795132][ T250] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 10.795398][ T250] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.795601][ T250] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 10.795809][ T250] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.796024][ T250] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 10.796239][ T250] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 10.796401][ T250] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 10.796610][ T250] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.796809][ T250] ? 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) 
[ 10.797029][ T250] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.797240][ T250] ksys_write (fs/read_write.c:731) 
[ 10.797398][ T250] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 10.797604][ T250] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.797821][ T250] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.798038][ T250] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.798290][  T250] RIP: 0033:0x7f5b32e53b77
[ 10.798501][ T250] 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
[   10.799227][  T250] RSP: 002b:00007ffc46915548 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   10.799543][  T250] RAX: ffffffffffffffda RBX: 00007f5b32c39140 RCX: 00007f5b32e53b77
[   10.799844][  T250] RDX: 0000000000000008 RSI: 000055db8bab11a0 RDI: 0000000000000006
[   10.800160][  T250] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[   10.800471][  T250] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f5b24cf1340
[   10.800775][  T250] R13: 000055db8bab11a0 R14: 0000000000000006 R15: 000055db8b888900
| [   13.995794][  T250] ------------[ cut here ]------------
| [ 13.996220][ T250] WARNING: CPU: 2 PID: 250 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) 
| [   13.996643][  T250] Modules linked in: netdevsim psample
| [   13.997272][  T250] Tainted: [W]=WARN
[   13.997534][  T250] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.997808][ T250] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.998094][ T250] 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
[   13.998808][  T250] RSP: 0018:ffffc90000c37528 EFLAGS: 00010246
[   13.999088][  T250] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   13.999490][  T250] RDX: 0000000000000000 RSI: ffff8880053b2cd0 RDI: ffff88800c530b78
[   13.999807][  T250] RBP: ffffffff98653580 R08: 0000000000000000 R09: fffffbfff2c82504
[   14.000135][  T250] R10: ffffffff96412827 R11: ffff88800c530040 R12: 0000000000000000
[   14.000455][  T250] R13: ffff8880053b2130 R14: ffff8880053b2008 R15: ffff8880053b2000
[   14.000768][  T250] FS:  00007f5b32c391c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[   14.001140][  T250] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.001406][  T250] CR2: 00007f5b25677d60 CR3: 000000000a9b4006 CR4: 0000000000772ef0
[   14.001720][  T250] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   14.002048][  T250] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   14.002363][  T250] PKRU: 55555554
[   14.002530][  T250] Call Trace:
[   14.002696][  T250]  <TASK>
[ 14.002812][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.003129][ T250] ? __warn (kernel/panic.c:748) 
[ 14.003386][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.003691][ T250] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 14.004009][ T250] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 14.004249][ T250] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 14.004466][ T250] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 14.004697][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 14.004914][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 14.005148][ T250] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 14.005420][ T250] ? _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) 
[ 14.005647][ T250] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 14.005872][ T250] register_netdevice (net/core/dev.c:11003) 
[ 14.006112][ T250] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 14.006331][ T250] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 14.006562][ T250] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 14.006800][ T250] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 14.007084][ T250] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 14.007262][ T250] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 14.007546][ T250] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 14.007833][ T250] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 14.008124][ T250] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 14.008355][ T250] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 14.008635][ T250] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 14.008858][ T250] ? 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)) 
[ 14.009040][ T250] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 14.009270][ T250] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 14.009494][ T250] __driver_probe_device (drivers/base/dd.c:800) 
[ 14.009715][ T250] driver_probe_device (drivers/base/dd.c:830) 
[ 14.009941][ T250] __device_attach_driver (drivers/base/dd.c:959) 
[ 14.010164][ T250] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 14.010426][ T250] bus_for_each_drv (drivers/base/bus.c:462) 
[ 14.010646][ T250] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 14.010864][ T250] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 14.011093][ T250] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 14.011311][ T250] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 14.011542][ T250] __device_attach (drivers/base/dd.c:1030) 
[ 14.011759][ T250] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 14.011987][ T250] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 14.012207][ T250] ? 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) 
[ 14.012433][ T250] bus_probe_device (drivers/base/bus.c:537) 
[ 14.012653][ T250] device_add (drivers/base/core.c:3672) 
[ 14.012873][ T250] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 14.013103][ T250] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 14.013332][ T250] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 14.013610][ T250] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 14.013885][ T250] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 14.014110][ T250] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 14.014339][ T250] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 14.014552][ T250] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 14.014778][ T250] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 14.014965][ T250] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 14.015180][ T250] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 14.015412][ T250] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 14.015684][ T250] ksys_write (fs/read_write.c:731) 
[ 14.015857][ T250] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 14.016085][ T250] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 14.016318][ T250] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 14.016536][ T250] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   14.016801][  T250] RIP: 0033:0x7f5b32e53b77
[ 14.017031][ T250] 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
[   14.017744][  T250] RSP: 002b:00007ffc469155e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   14.018077][  T250] RAX: ffffffffffffffda RBX: 00007f5b32c39140 RCX: 00007f5b32e53b77
[   14.018392][  T250] RDX: 000000000000000a RSI: 000055db8bab50b0 RDI: 0000000000000006
[   14.018703][  T250] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000000000
[   14.019022][  T250] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f5b24b7b280
[   14.019337][  T250] R13: 000055db8bab50b0 R14: 0000000000000006 R15: 000055db8b888900
| [   16.688765][  T250] ------------[ cut here ]------------
| [ 16.690185][ T250] WARNING: CPU: 3 PID: 250 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) 
| [   16.690597][  T250] Modules linked in: netdevsim psample
| [   16.691263][  T250] Tainted: [W]=WARN
[   16.691419][  T250] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.691674][ T250] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 16.691955][ T250] 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
[   16.692742][  T250] RSP: 0018:ffffc90000c37528 EFLAGS: 00010246
[   16.693012][  T250] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   16.693315][  T250] RDX: 0000000000000000 RSI: ffff888005a5acd0 RDI: ffff88800c530b78
[   16.693617][  T250] RBP: ffffffff98653580 R08: 0000000000000000 R09: fffffbfff2c82504
[   16.693916][  T250] R10: ffffffff96412827 R11: ffff88800c530040 R12: 0000000000000000
[   16.694229][  T250] R13: ffff888005a5a130 R14: ffff888005a5a008 R15: ffff888005a5a000
[   16.694531][  T250] FS:  00007f5b32c391c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[   16.694878][  T250] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   16.695146][  T250] CR2: 000055db8b8b2900 CR3: 000000000a9b4001 CR4: 0000000000772ef0
[   16.695453][  T250] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   16.695756][  T250] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   16.696066][  T250] PKRU: 55555554
[   16.696220][  T250] Call Trace:
[   16.696375][  T250]  <TASK>
[ 16.696480][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 16.696686][ T250] ? __warn (kernel/panic.c:748) 
[ 16.696843][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 16.697060][ T250] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 16.697269][ T250] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 16.697424][ T250] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 16.697625][ T250] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 16.697850][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 16.698074][ T250] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 16.698285][ T250] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 16.698543][ T250] ? _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) 
[ 16.698752][ T250] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 16.698977][ T250] register_netdevice (net/core/dev.c:11003) 
[ 16.699188][ T250] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 16.699392][ T250] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 16.699609][ T250] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 16.699829][ T250] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 16.700114][ T250] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 16.700275][ T250] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 16.700543][ T250] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 16.700805][ T250] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 16.701082][ T250] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 16.701298][ T250] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 16.701556][ T250] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 16.701762][ T250] ? 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)) 
[ 16.701916][ T250] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 16.702139][ T250] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 16.702354][ T250] __driver_probe_device (drivers/base/dd.c:800) 
[ 16.702561][ T250] driver_probe_device (drivers/base/dd.c:830) 
[ 16.702765][ T250] __device_attach_driver (drivers/base/dd.c:959) 
[ 16.702984][ T250] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 16.703236][ T250] bus_for_each_drv (drivers/base/bus.c:462) 
[ 16.703450][ T250] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 16.703652][ T250] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 16.703855][ T250] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 16.704066][ T250] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 16.704278][ T250] __device_attach (drivers/base/dd.c:1030) 
[ 16.704482][ T250] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 16.704685][ T250] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 16.704890][ T250] ? 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) 
[ 16.705109][ T250] bus_probe_device (drivers/base/bus.c:537) 
[ 16.705317][ T250] device_add (drivers/base/core.c:3672) 
[ 16.705525][ T250] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 16.705728][ T250] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 16.705953][ T250] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 16.706216][ T250] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 16.706480][ T250] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 16.706686][ T250] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 16.706895][ T250] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 16.707111][ T250] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 16.707322][ T250] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 16.707486][ T250] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 16.707689][ T250] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 16.707927][ T250] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 16.708263][ T250] ksys_write (fs/read_write.c:731) 
[ 16.708424][ T250] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 16.708628][ T250] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 16.708847][ T250] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 16.709068][ T250] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.709319][  T250] RIP: 0033:0x7f5b32e53b77
[ 16.709525][ T250] 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
[   16.710237][  T250] RSP: 002b:00007ffc469155e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   16.710545][  T250] RAX: ffffffffffffffda RBX: 00007f5b32c39140 RCX: 00007f5b32e53b77
[   16.710846][  T250] RDX: 0000000000000009 RSI: 000055db8bab50b0 RDI: 0000000000000006
[   16.711160][  T250] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   16.711477][  T250] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f5b24b7b280


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