======================================
| 0
| xx__-> [  283.004375][ T3445] ------------[ cut here ]------------
| [ 283.004750][ T3445] WARNING: CPU: 0 PID: 3445 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) 
| [  283.005202][ T3445] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp sch_etf sch_fq ipt_rpfilter nft_compat nf_tables act_mirred cls_matchall ip6_gre gre sch_ingress pktgen vxlan
[  283.006352][ T3445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 283.006632][ T3445] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 283.006915][ T3445] 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
[  283.007683][ T3445] RSP: 0018:ffffc90000d97528 EFLAGS: 00010246
[  283.007963][ T3445] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  283.008292][ T3445] RDX: 0000000000000000 RSI: ffff888010452cd0 RDI: ffff88800c9dae38
[  283.008633][ T3445] RBP: ffffffff8da53580 R08: 0000000000000000 R09: fffffbfff1702504
[  283.008962][ T3445] R10: ffffffff8b812827 R11: ffff88800c9da300 R12: 0000000000000000
[  283.009452][ T3445] R13: ffff888010452130 R14: ffff888010452008 R15: ffff888010452000
[  283.009782][ T3445] FS:  00007f730fa761c0(0000) GS:ffff888065a00000(0000) knlGS:0000000000000000
[  283.010174][ T3445] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  283.010469][ T3445] CR2: 000055d001f76120 CR3: 000000000c4ec002 CR4: 0000000000772ef0
[  283.010801][ T3445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  283.011129][ T3445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  283.011467][ T3445] PKRU: 55555554
[  283.011639][ T3445] Call Trace:
[  283.011810][ T3445]  <TASK>
[ 283.011929][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 283.012153][ T3445] ? __warn (kernel/panic.c:748) 
[ 283.012324][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 283.012561][ T3445] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 283.012784][ T3445] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 283.012952][ T3445] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 283.013179][ T3445] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 283.013424][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 283.013644][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 283.013868][ T3445] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 283.014146][ T3445] ? _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) 
[ 283.014379][ T3445] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 283.014611][ T3445] register_netdevice (net/core/dev.c:11003) 
[ 283.014846][ T3445] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 283.015060][ T3445] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 283.015293][ T3445] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 283.015537][ T3445] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 283.015818][ T3445] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 283.015987][ T3445] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 283.016272][ T3445] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 283.016562][ T3445] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 283.016843][ T3445] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 283.017073][ T3445] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 283.017358][ T3445] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 283.017580][ T3445] ? 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)) 
[ 283.017748][ T3445] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 283.017975][ T3445] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 283.018203][ T3445] __driver_probe_device (drivers/base/dd.c:800) 
[ 283.018439][ T3445] driver_probe_device (drivers/base/dd.c:830) 
[ 283.018663][ T3445] __device_attach_driver (drivers/base/dd.c:959) 
[ 283.018886][ T3445] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 283.019182][ T3445] bus_for_each_drv (drivers/base/bus.c:462) 
[ 283.019419][ T3445] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 283.019637][ T3445] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 283.019859][ T3445] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 283.020078][ T3445] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 283.020308][ T3445] __device_attach (drivers/base/dd.c:1030) 
[ 283.020539][ T3445] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 283.020758][ T3445] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 283.020981][ T3445] ? 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) 
[ 283.021207][ T3445] bus_probe_device (drivers/base/bus.c:537) 
[ 283.021445][ T3445] device_add (drivers/base/core.c:3672) 
[ 283.021667][ T3445] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 283.021885][ T3445] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 283.022116][ T3445] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 283.022408][ T3445] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 283.022696][ T3445] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 283.022918][ T3445] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 283.023146][ T3445] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 283.023371][ T3445] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 283.023598][ T3445] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 283.023775][ T3445] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 283.024001][ T3445] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 283.024217][ T3445] ? 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) 
[ 283.024457][ T3445] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 283.024693][ T3445] ksys_write (fs/read_write.c:731) 
[ 283.024860][ T3445] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 283.025082][ T3445] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 283.025314][ T3445] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 283.025542][ T3445] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  283.025814][ T3445] RIP: 0033:0x7f730fc90b77
[ 283.026050][ T3445] 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
[  283.026816][ T3445] RSP: 002b:00007ffc13356758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  283.027153][ T3445] RAX: ffffffffffffffda RBX: 00007f730fa76140 RCX: 00007f730fc90b77
[  283.027492][ T3445] RDX: 0000000000000008 RSI: 00005584296bdfd0 RDI: 0000000000000006
[  283.027821][ T3445] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[  283.028148][ T3445] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f7301b2e340
[  283.028489][ T3445] R13: 00005584296bdfd0 R14: 0000000000000006 R15: 0000558429495900
| [  286.178503][ T3445] ------------[ cut here ]------------
| [ 286.178987][ T3445] WARNING: CPU: 0 PID: 3445 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) 
| [  286.179568][ T3445] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp sch_etf sch_fq ipt_rpfilter nft_compat nf_tables act_mirred cls_matchall ip6_gre gre sch_ingress pktgen vxlan
| [  286.181213][ T3445] Tainted: [W]=WARN
[  286.182030][ T3445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 286.182307][ T3445] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 286.182665][ T3445] 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
[  286.183519][ T3445] RSP: 0018:ffffc90000d97528 EFLAGS: 00010246
[  286.183800][ T3445] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  286.184126][ T3445] RDX: 0000000000000000 RSI: ffff88800cc12cd0 RDI: ffff88800c9dae38
[  286.184472][ T3445] RBP: ffffffff8da53580 R08: 0000000000000000 R09: fffffbfff1702504
[  286.184799][ T3445] R10: ffffffff8b812827 R11: ffff88800c9da300 R12: 0000000000000000
[  286.185124][ T3445] R13: ffff88800cc12130 R14: ffff88800cc12008 R15: ffff88800cc12000
[  286.185553][ T3445] FS:  00007f730fa761c0(0000) GS:ffff888065a00000(0000) knlGS:0000000000000000
[  286.185993][ T3445] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  286.186263][ T3445] CR2: 000055cfd8e2d900 CR3: 000000000c4ec005 CR4: 0000000000772ef0
[  286.186666][ T3445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  286.186988][ T3445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  286.187318][ T3445] PKRU: 55555554
[  286.187494][ T3445] Call Trace:
[  286.187662][ T3445]  <TASK>
[ 286.187775][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 286.188004][ T3445] ? __warn (kernel/panic.c:748) 
[ 286.188177][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 286.188426][ T3445] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 286.188707][ T3445] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 286.188877][ T3445] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 286.189098][ T3445] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 286.189348][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 286.189573][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 286.189904][ T3445] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 286.190275][ T3445] ? _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) 
[ 286.190575][ T3445] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 286.190821][ T3445] register_netdevice (net/core/dev.c:11003) 
[ 286.191069][ T3445] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 286.191361][ T3445] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 286.191668][ T3445] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 286.191939][ T3445] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 286.192238][ T3445] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 286.192471][ T3445] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 286.192798][ T3445] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 286.193082][ T3445] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 286.193421][ T3445] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 286.193731][ T3445] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 286.194014][ T3445] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 286.194237][ T3445] ? 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)) 
[ 286.194414][ T3445] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 286.194644][ T3445] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 286.194873][ T3445] __driver_probe_device (drivers/base/dd.c:800) 
[ 286.195112][ T3445] driver_probe_device (drivers/base/dd.c:830) 
[ 286.195346][ T3445] __device_attach_driver (drivers/base/dd.c:959) 
[ 286.195571][ T3445] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 286.195840][ T3445] bus_for_each_drv (drivers/base/bus.c:462) 
[ 286.196065][ T3445] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 286.196286][ T3445] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 286.196525][ T3445] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 286.196750][ T3445] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 286.196979][ T3445] __device_attach (drivers/base/dd.c:1030) 
[ 286.197203][ T3445] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 286.197436][ T3445] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 286.197660][ T3445] ? 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) 
[ 286.197891][ T3445] bus_probe_device (drivers/base/bus.c:537) 
[ 286.198117][ T3445] device_add (drivers/base/core.c:3672) 
[ 286.198362][ T3445] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 286.198586][ T3445] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 286.198821][ T3445] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 286.199109][ T3445] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 286.199406][ T3445] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 286.199627][ T3445] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 286.199840][ T3445] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 286.200059][ T3445] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 286.200290][ T3445] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 286.200477][ T3445] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 286.200685][ T3445] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 286.200904][ T3445] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 286.201181][ T3445] ksys_write (fs/read_write.c:731) 
[ 286.201353][ T3445] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 286.201560][ T3445] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 286.201781][ T3445] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 286.201990][ T3445] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  286.202248][ T3445] RIP: 0033:0x7f730fc90b77
[ 286.202467][ T3445] 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
[  286.203178][ T3445] RSP: 002b:00007ffc133567f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  286.203499][ T3445] RAX: ffffffffffffffda RBX: 00007f730fa76140 RCX: 00007f730fc90b77
[  286.203805][ T3445] RDX: 000000000000000a RSI: 00005584296c1ee0 RDI: 0000000000000006
[  286.204119][ T3445] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000000000
[  286.204449][ T3445] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f73019b8280
[  286.204759][ T3445] R13: 00005584296c1ee0 R14: 0000000000000006 R15: 0000558429495900
| [  288.927772][ T3445] ------------[ cut here ]------------
| [ 288.928292][ T3445] WARNING: CPU: 1 PID: 3445 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) 
| [  288.928730][ T3445] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp sch_etf sch_fq ipt_rpfilter nft_compat nf_tables act_mirred cls_matchall ip6_gre gre sch_ingress pktgen vxlan
| [  288.929801][ T3445] Tainted: [W]=WARN
[  288.929958][ T3445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 288.930243][ T3445] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 288.930525][ T3445] 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
[  288.931245][ T3445] RSP: 0018:ffffc90000d97528 EFLAGS: 00010246
[  288.931516][ T3445] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  288.931823][ T3445] RDX: 0000000000000000 RSI: ffff8880096d2cd0 RDI: ffff88800c9dae38
[  288.932126][ T3445] RBP: ffffffff8da53580 R08: 0000000000000000 R09: fffffbfff1702504
[  288.932440][ T3445] R10: ffffffff8b812827 R11: ffff88800c9da300 R12: 0000000000000000
[  288.932755][ T3445] R13: ffff8880096d2130 R14: ffff8880096d2008 R15: ffff8880096d2000
[  288.933063][ T3445] FS:  00007f730fa761c0(0000) GS:ffff888065a80000(0000) knlGS:0000000000000000
[  288.933435][ T3445] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  288.933691][ T3445] CR2: 00005584294bf900 CR3: 000000000c4ec003 CR4: 0000000000772ef0
[  288.934001][ T3445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  288.934308][ T3445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  288.934631][ T3445] PKRU: 55555554
[  288.934792][ T3445] Call Trace:
[  288.934948][ T3445]  <TASK>
[ 288.935055][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 288.935261][ T3445] ? __warn (kernel/panic.c:748) 
[ 288.935435][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 288.935657][ T3445] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 288.935878][ T3445] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 288.936040][ T3445] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 288.936254][ T3445] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 288.936490][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 288.936707][ T3445] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 288.936926][ T3445] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 288.937191][ T3445] ? _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) 
[ 288.937412][ T3445] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 288.937627][ T3445] register_netdevice (net/core/dev.c:11003) 
[ 288.937846][ T3445] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 288.938056][ T3445] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 288.938285][ T3445] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 288.938523][ T3445] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 288.938803][ T3445] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 288.938967][ T3445] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 288.939242][ T3445] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 288.939526][ T3445] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 288.939791][ T3445] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 288.940018][ T3445] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 288.940301][ T3445] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 288.940532][ T3445] ? 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)) 
[ 288.940696][ T3445] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 288.940923][ T3445] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 288.941139][ T3445] __driver_probe_device (drivers/base/dd.c:800) 
[ 288.941370][ T3445] driver_probe_device (drivers/base/dd.c:830) 
[ 288.941577][ T3445] __device_attach_driver (drivers/base/dd.c:959) 
[ 288.941849][ T3445] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 288.942109][ T3445] bus_for_each_drv (drivers/base/bus.c:462) 
[ 288.942317][ T3445] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 288.942534][ T3445] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 288.942742][ T3445] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 288.942947][ T3445] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 288.943162][ T3445] __device_attach (drivers/base/dd.c:1030) 
[ 288.943388][ T3445] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 288.943594][ T3445] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 288.943799][ T3445] ? 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) 
[ 288.944012][ T3445] bus_probe_device (drivers/base/bus.c:537) 
[ 288.944224][ T3445] device_add (drivers/base/core.c:3672) 
[ 288.944443][ T3445] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 288.944655][ T3445] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 288.944878][ T3445] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 288.945146][ T3445] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 288.945427][ T3445] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 288.945635][ T3445] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 288.945846][ T3445] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 288.946055][ T3445] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 288.946267][ T3445] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 288.946449][ T3445] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 288.946654][ T3445] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 288.946876][ T3445] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 288.947144][ T3445] ksys_write (fs/read_write.c:731) 
[ 288.947303][ T3445] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 288.947515][ T3445] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 288.947728][ T3445] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 288.947938][ T3445] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  288.948203][ T3445] RIP: 0033:0x7f730fc90b77
[ 288.948427][ T3445] 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
[  288.949131][ T3445] RSP: 002b:00007ffc133567f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  288.949455][ T3445] RAX: ffffffffffffffda RBX: 00007f730fa76140 RCX: 00007f730fc90b77
[  288.949759][ T3445] RDX: 0000000000000009 RSI: 00005584296c1ee0 RDI: 0000000000000006
[  288.950067][ T3445] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  288.950400][ T3445] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f73019b8280


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