======================================
| 0
| xx__-> [  183.192824][ T2025] ------------[ cut here ]------------
| [ 183.193254][ T2025] WARNING: CPU: 3 PID: 2025 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) 
| [  183.193787][ T2025] Modules linked in: netdevsim psample vxlan xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core
[  183.194576][ T2025] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 183.194844][ T2025] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 183.195124][ T2025] 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
[  183.195845][ T2025] RSP: 0018:ffffc90000937528 EFLAGS: 00010246
[  183.196119][ T2025] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  183.196430][ T2025] RDX: 0000000000000000 RSI: ffff88800248acd0 RDI: ffff8880052d2e38
[  183.196742][ T2025] RBP: ffffffff97253580 R08: 0000000000000000 R09: fffffbfff2a02504
[  183.197067][ T2025] R10: ffffffff95012827 R11: ffff8880052d2300 R12: 0000000000000000
[  183.197382][ T2025] R13: ffff88800248a130 R14: ffff88800248a008 R15: ffff88800248a000
[  183.197696][ T2025] FS:  00007f0b8f1301c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  183.198069][ T2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.198333][ T2025] CR2: 0000558dee7e4810 CR3: 0000000004f80001 CR4: 0000000000772ef0
[  183.198650][ T2025] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  183.198970][ T2025] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  183.199293][ T2025] PKRU: 55555554
[  183.199457][ T2025] Call Trace:
[  183.199622][ T2025]  <TASK>
[ 183.199735][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 183.200003][ T2025] ? __warn (kernel/panic.c:748) 
[ 183.200168][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 183.200376][ T2025] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 183.200590][ T2025] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 183.200752][ T2025] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 183.200971][ T2025] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 183.201193][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 183.201404][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 183.201620][ T2025] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 183.201884][ T2025] ? _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) 
[ 183.202109][ T2025] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 183.202325][ T2025] register_netdevice (net/core/dev.c:11003) 
[ 183.202544][ T2025] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 183.202751][ T2025] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 183.202982][ T2025] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 183.203211][ T2025] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 183.203476][ T2025] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 183.203636][ T2025] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 183.203912][ T2025] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 183.204194][ T2025] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 183.204465][ T2025] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 183.204688][ T2025] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 183.204962][ T2025] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 183.205173][ T2025] ? 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)) 
[ 183.205332][ T2025] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 183.205548][ T2025] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 183.205763][ T2025] __driver_probe_device (drivers/base/dd.c:800) 
[ 183.205986][ T2025] driver_probe_device (drivers/base/dd.c:830) 
[ 183.206200][ T2025] __device_attach_driver (drivers/base/dd.c:959) 
[ 183.206410][ T2025] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 183.206665][ T2025] bus_for_each_drv (drivers/base/bus.c:462) 
[ 183.206876][ T2025] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 183.207094][ T2025] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 183.207300][ T2025] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 183.207506][ T2025] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 183.207726][ T2025] __device_attach (drivers/base/dd.c:1030) 
[ 183.207932][ T2025] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 183.208150][ T2025] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 183.208359][ T2025] ? 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) 
[ 183.208575][ T2025] bus_probe_device (drivers/base/bus.c:537) 
[ 183.208785][ T2025] device_add (drivers/base/core.c:3672) 
[ 183.209008][ T2025] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 183.209225][ T2025] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 183.209444][ T2025] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 183.209712][ T2025] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 183.209993][ T2025] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 183.210197][ T2025] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 183.210423][ T2025] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 183.210624][ T2025] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 183.210837][ T2025] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 183.211027][ T2025] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 183.211246][ T2025] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 183.211452][ T2025] ? 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) 
[ 183.211669][ T2025] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 183.211886][ T2025] ksys_write (fs/read_write.c:731) 
[ 183.212060][ T2025] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 183.212274][ T2025] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 183.212502][ T2025] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 183.212715][ T2025] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  183.212982][ T2025] RIP: 0033:0x7f0b8f34ab77
[ 183.213199][ T2025] 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
[  183.213919][ T2025] RSP: 002b:00007fff2a62e118 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  183.214243][ T2025] RAX: ffffffffffffffda RBX: 00007f0b8f130140 RCX: 00007f0b8f34ab77
[  183.214557][ T2025] RDX: 0000000000000008 RSI: 00005632f7c9e1a0 RDI: 0000000000000006
[  183.214866][ T2025] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[  183.215189][ T2025] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f0b811e8340
[  183.215501][ T2025] R13: 00005632f7c9e1a0 R14: 0000000000000006 R15: 00005632f7a75900
| [  186.318339][ T2025] ------------[ cut here ]------------
| [ 186.318780][ T2025] WARNING: CPU: 0 PID: 2025 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) 
| [  186.319242][ T2025] Modules linked in: netdevsim psample vxlan xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core
| [  186.320067][ T2025] Tainted: [W]=WARN
[  186.320253][ T2025] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 186.320512][ T2025] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 186.320780][ T2025] 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
[  186.321514][ T2025] RSP: 0018:ffffc90000937528 EFLAGS: 00010246
[  186.321778][ T2025] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  186.322099][ T2025] RDX: 0000000000000000 RSI: ffff88800b69acd0 RDI: ffff8880052d2e38
[  186.322407][ T2025] RBP: ffffffff97253580 R08: 0000000000000000 R09: fffffbfff2a02504
[  186.322720][ T2025] R10: ffffffff95012827 R11: ffff8880052d2300 R12: 0000000000000000
[  186.323053][ T2025] R13: ffff88800b69a130 R14: ffff88800b69a008 R15: ffff88800b69a000
[  186.323370][ T2025] FS:  00007f0b8f1301c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[  186.324129][ T2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  186.324399][ T2025] CR2: 00007f6ed0076960 CR3: 0000000004f80004 CR4: 0000000000772ef0
[  186.324710][ T2025] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  186.325031][ T2025] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  186.325350][ T2025] PKRU: 55555554
[  186.325508][ T2025] Call Trace:
[  186.325666][ T2025]  <TASK>
[ 186.325774][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 186.325997][ T2025] ? __warn (kernel/panic.c:748) 
[ 186.326158][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 186.326369][ T2025] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 186.326582][ T2025] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 186.326748][ T2025] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 186.326981][ T2025] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 186.327206][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 186.327416][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 186.327631][ T2025] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 186.327895][ T2025] ? _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) 
[ 186.328119][ T2025] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 186.328335][ T2025] register_netdevice (net/core/dev.c:11003) 
[ 186.328551][ T2025] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 186.328757][ T2025] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 186.328986][ T2025] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 186.329224][ T2025] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 186.329490][ T2025] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 186.329655][ T2025] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 186.329931][ T2025] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 186.330211][ T2025] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 186.330478][ T2025] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 186.330700][ T2025] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 186.330988][ T2025] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 186.331201][ T2025] ? 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)) 
[ 186.331363][ T2025] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 186.331581][ T2025] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 186.331807][ T2025] __driver_probe_device (drivers/base/dd.c:800) 
[ 186.332032][ T2025] driver_probe_device (drivers/base/dd.c:830) 
[ 186.332244][ T2025] __device_attach_driver (drivers/base/dd.c:959) 
[ 186.332467][ T2025] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 186.332728][ T2025] bus_for_each_drv (drivers/base/bus.c:462) 
[ 186.332949][ T2025] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 186.333159][ T2025] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 186.333370][ T2025] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 186.333616][ T2025] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 186.333833][ T2025] __device_attach (drivers/base/dd.c:1030) 
[ 186.334053][ T2025] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 186.334260][ T2025] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 186.334469][ T2025] ? 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) 
[ 186.334685][ T2025] bus_probe_device (drivers/base/bus.c:537) 
[ 186.334897][ T2025] device_add (drivers/base/core.c:3672) 
[ 186.335139][ T2025] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 186.335347][ T2025] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 186.335566][ T2025] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 186.335836][ T2025] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 186.336117][ T2025] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 186.336323][ T2025] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 186.336536][ T2025] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 186.336746][ T2025] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 186.336969][ T2025] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 186.337136][ T2025] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 186.337342][ T2025] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 186.337564][ T2025] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 186.337832][ T2025] ksys_write (fs/read_write.c:731) 
[ 186.338002][ T2025] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 186.338217][ T2025] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 186.338436][ T2025] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 186.338645][ T2025] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  186.338901][ T2025] RIP: 0033:0x7f0b8f34ab77
[ 186.339142][ T2025] 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
[  186.339858][ T2025] RSP: 002b:00007fff2a62e1b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  186.340179][ T2025] RAX: ffffffffffffffda RBX: 00007f0b8f130140 RCX: 00007f0b8f34ab77
[  186.340488][ T2025] RDX: 000000000000000b RSI: 00005632f7ca20b0 RDI: 0000000000000006
[  186.340797][ T2025] RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
[  186.341114][ T2025] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f0b81072280
[  186.341421][ T2025] R13: 00005632f7ca20b0 R14: 0000000000000006 R15: 00005632f7a75900
| [  190.264380][ T2025] ------------[ cut here ]------------
| [ 190.264828][ T2025] WARNING: CPU: 2 PID: 2025 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) 
| [  190.265317][ T2025] Modules linked in: netdevsim psample vxlan xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core
| [  190.266338][ T2025] Tainted: [W]=WARN
[  190.266522][ T2025] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 190.266807][ T2025] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 190.267129][ T2025] 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
[  190.267903][ T2025] RSP: 0018:ffffc90000937528 EFLAGS: 00010246
[  190.268214][ T2025] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  190.268556][ T2025] RDX: 0000000000000000 RSI: ffff88800a9eacd0 RDI: ffff8880052d2e38
[  190.268900][ T2025] RBP: ffffffff97253580 R08: 0000000000000000 R09: fffffbfff2a02504
[  190.269260][ T2025] R10: ffffffff95012827 R11: ffff8880052d2300 R12: 0000000000000000
[  190.269600][ T2025] R13: ffff88800a9ea130 R14: ffff88800a9ea008 R15: ffff88800a9ea000
[  190.269960][ T2025] FS:  00007f0b8f1301c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  190.270355][ T2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  190.270649][ T2025] CR2: 00005632f7a9f900 CR3: 0000000004f80001 CR4: 0000000000772ef0
[  190.271005][ T2025] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  190.271342][ T2025] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  190.271679][ T2025] PKRU: 55555554
[  190.271858][ T2025] Call Trace:
[  190.272061][ T2025]  <TASK>
[ 190.272190][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 190.272429][ T2025] ? __warn (kernel/panic.c:748) 
[ 190.272617][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 190.272850][ T2025] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 190.273111][ T2025] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 190.273295][ T2025] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 190.273530][ T2025] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 190.273779][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 190.274038][ T2025] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 190.274278][ T2025] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 190.274574][ T2025] ? _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) 
[ 190.274814][ T2025] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 190.275072][ T2025] register_netdevice (net/core/dev.c:11003) 
[ 190.275309][ T2025] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 190.275539][ T2025] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 190.275789][ T2025] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 190.276061][ T2025] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 190.276358][ T2025] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 190.276544][ T2025] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 190.276845][ T2025] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 190.277165][ T2025] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 190.277465][ T2025] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 190.277719][ T2025] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 190.278025][ T2025] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 190.278267][ T2025] ? 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)) 
[ 190.278454][ T2025] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 190.278700][ T2025] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 190.278956][ T2025] __driver_probe_device (drivers/base/dd.c:800) 
[ 190.279207][ T2025] driver_probe_device (drivers/base/dd.c:830) 
[ 190.279439][ T2025] __device_attach_driver (drivers/base/dd.c:959) 
[ 190.279678][ T2025] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 190.279986][ T2025] bus_for_each_drv (drivers/base/bus.c:462) 
[ 190.280226][ T2025] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 190.280459][ T2025] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 190.280692][ T2025] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 190.280927][ T2025] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 190.281189][ T2025] __device_attach (drivers/base/dd.c:1030) 
[ 190.281429][ T2025] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 190.281659][ T2025] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 190.281895][ T2025] ? 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) 
[ 190.282153][ T2025] bus_probe_device (drivers/base/bus.c:537) 
[ 190.282392][ T2025] device_add (drivers/base/core.c:3672) 
[ 190.282627][ T2025] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 190.282857][ T2025] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 190.283120][ T2025] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 190.283424][ T2025] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 190.283722][ T2025] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 190.283977][ T2025] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 190.284215][ T2025] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 190.284447][ T2025] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 190.284689][ T2025] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 190.284880][ T2025] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 190.285131][ T2025] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 190.285383][ T2025] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 190.285680][ T2025] ksys_write (fs/read_write.c:731) 
[ 190.285862][ T2025] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 190.286114][ T2025] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 190.286356][ T2025] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 190.286595][ T2025] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  190.286881][ T2025] RIP: 0033:0x7f0b8f34ab77
[ 190.287134][ T2025] 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
[  190.287918][ T2025] RSP: 002b:00007fff2a62e1b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  190.288278][ T2025] RAX: ffffffffffffffda RBX: 00007f0b8f130140 RCX: 00007f0b8f34ab77
[  190.288623][ T2025] RDX: 0000000000000009 RSI: 00005632f7ca20b0 RDI: 0000000000000006
[  190.289008][ T2025] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  190.289354][ T2025] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f0b81072280


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