======================================
| 0
| xx__-> [  736.097928][ T9642] ------------[ cut here ]------------
| [ 736.098329][ T9642] WARNING: CPU: 1 PID: 9642 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) 
| [  736.098768][ T9642] Modules linked in: netdevsim psample act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router sha1_generic xfrm_user xt_length nft_compat nf_tables act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_mirred cls_u32 ifb act_gact cls_flower sch_ingress vxlan
[  736.100525][ T9642] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 736.100786][ T9642] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 736.101062][ T9642] 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
[  736.101816][ T9642] RSP: 0018:ffffc900009f7528 EFLAGS: 00010246
[  736.102085][ T9642] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  736.102392][ T9642] RDX: 0000000000000000 RSI: ffff888002b9acd0 RDI: ffff88801bf78b78
[  736.102717][ T9642] RBP: ffffffffac653580 R08: 0000000000000000 R09: fffffbfff5482504
[  736.103026][ T9642] R10: ffffffffaa412827 R11: ffff88801bf78040 R12: 0000000000000000
[  736.103335][ T9642] R13: ffff888002b9a130 R14: ffff888002b9a008 R15: ffff888002b9a000
[  736.103653][ T9642] FS:  00007fab148041c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[  736.104013][ T9642] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  736.104274][ T9642] CR2: 00007fab071d17c0 CR3: 000000000a0f2003 CR4: 0000000000772ef0
[  736.104591][ T9642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  736.104899][ T9642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  736.105212][ T9642] PKRU: 55555554
[  736.105371][ T9642] Call Trace:
[  736.105541][ T9642]  <TASK>
[ 736.105652][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 736.105863][ T9642] ? __warn (kernel/panic.c:748) 
[ 736.106021][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 736.106235][ T9642] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 736.106447][ T9642] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 736.106620][ T9642] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 736.106826][ T9642] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 736.107047][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 736.107254][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 736.107476][ T9642] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 736.107738][ T9642] ? _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) 
[ 736.107948][ T9642] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 736.108165][ T9642] register_netdevice (net/core/dev.c:11003) 
[ 736.108381][ T9642] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 736.108593][ T9642] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 736.108814][ T9642] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 736.109034][ T9642] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 736.109299][ T9642] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 736.109470][ T9642] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 736.109746][ T9642] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 736.110009][ T9642] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 736.110275][ T9642] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 736.110502][ T9642] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 736.110764][ T9642] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 736.110974][ T9642] ? 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)) 
[ 736.111137][ T9642] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 736.111351][ T9642] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 736.111574][ T9642] __driver_probe_device (drivers/base/dd.c:800) 
[ 736.111786][ T9642] driver_probe_device (drivers/base/dd.c:830) 
[ 736.111998][ T9642] __device_attach_driver (drivers/base/dd.c:959) 
[ 736.112207][ T9642] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 736.112468][ T9642] bus_for_each_drv (drivers/base/bus.c:462) 
[ 736.112680][ T9642] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 736.112884][ T9642] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 736.113091][ T9642] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 736.113297][ T9642] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 736.113519][ T9642] __device_attach (drivers/base/dd.c:1030) 
[ 736.113727][ T9642] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 736.113932][ T9642] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 736.114141][ T9642] ? 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) 
[ 736.114354][ T9642] bus_probe_device (drivers/base/bus.c:537) 
[ 736.114572][ T9642] device_add (drivers/base/core.c:3672) 
[ 736.114784][ T9642] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 736.114988][ T9642] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 736.115204][ T9642] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 736.115485][ T9642] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 736.115761][ T9642] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 736.115965][ T9642] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 736.116184][ T9642] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 736.116390][ T9642] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 736.116612][ T9642] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 736.116778][ T9642] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 736.116991][ T9642] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 736.117200][ T9642] ? 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) 
[ 736.117414][ T9642] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 736.117635][ T9642] ksys_write (fs/read_write.c:731) 
[ 736.117796][ T9642] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 736.117999][ T9642] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 736.118216][ T9642] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 736.118426][ T9642] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  736.118696][ T9642] RIP: 0033:0x7fab14a1eb77
[ 736.118913][ T9642] 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
[  736.119627][ T9642] RSP: 002b:00007fffb17f6918 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  736.119942][ T9642] RAX: ffffffffffffffda RBX: 00007fab14804140 RCX: 00007fab14a1eb77
[  736.120253][ T9642] RDX: 0000000000000008 RSI: 000056353a6e5e20 RDI: 0000000000000006
[  736.120571][ T9642] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[  736.120881][ T9642] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fab067414c0
[  736.121186][ T9642] R13: 000056353a6e5e20 R14: 0000000000000006 R15: 000056353a4c0900
| [  739.222789][ T9642] ------------[ cut here ]------------
| [ 739.223187][ T9642] WARNING: CPU: 3 PID: 9642 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) 
| [  739.223796][ T9642] Modules linked in: netdevsim psample act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router sha1_generic xfrm_user xt_length nft_compat nf_tables act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_mirred cls_u32 ifb act_gact cls_flower sch_ingress vxlan
| [  739.225399][ T9642] Tainted: [W]=WARN
[  739.225581][ T9642] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 739.225834][ T9642] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 739.226088][ T9642] 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
[  739.226828][ T9642] RSP: 0018:ffffc900009f7528 EFLAGS: 00010246
[  739.227091][ T9642] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  739.227529][ T9642] RDX: 0000000000000000 RSI: ffff8880104aacd0 RDI: ffff88801bf78b78
[  739.227838][ T9642] RBP: ffffffffac653580 R08: 0000000000000000 R09: fffffbfff5482504
[  739.228142][ T9642] R10: ffffffffaa412827 R11: ffff88801bf78040 R12: 0000000000000000
[  739.228445][ T9642] R13: ffff8880104aa130 R14: ffff8880104aa008 R15: ffff8880104aa000
[  739.228757][ T9642] FS:  00007fab148041c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  739.229116][ T9642] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  739.229368][ T9642] CR2: 000056156f4a2a88 CR3: 000000000a0f2003 CR4: 0000000000772ef0
[  739.229680][ T9642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  739.229975][ T9642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  739.230273][ T9642] PKRU: 55555554
[  739.230429][ T9642] Call Trace:
[  739.230589][ T9642]  <TASK>
[ 739.230694][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 739.230897][ T9642] ? __warn (kernel/panic.c:748) 
[ 739.231054][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 739.231256][ T9642] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 739.231471][ T9642] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 739.231648][ T9642] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 739.231854][ T9642] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 739.232073][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 739.232281][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 739.232507][ T9642] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 739.232781][ T9642] ? _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) 
[ 739.232990][ T9642] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 739.233197][ T9642] register_netdevice (net/core/dev.c:11003) 
[ 739.233404][ T9642] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 739.233610][ T9642] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 739.233843][ T9642] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 739.234085][ T9642] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 739.234348][ T9642] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 739.234517][ T9642] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 739.234796][ T9642] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 739.235084][ T9642] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 739.235340][ T9642] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 739.235588][ T9642] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 739.235850][ T9642] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 739.236057][ T9642] ? 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)) 
[ 739.236220][ T9642] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 739.236435][ T9642] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 739.236657][ T9642] __driver_probe_device (drivers/base/dd.c:800) 
[ 739.236866][ T9642] driver_probe_device (drivers/base/dd.c:830) 
[ 739.237077][ T9642] __device_attach_driver (drivers/base/dd.c:959) 
[ 739.237296][ T9642] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 739.237549][ T9642] bus_for_each_drv (drivers/base/bus.c:462) 
[ 739.237751][ T9642] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 739.237950][ T9642] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 739.238149][ T9642] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 739.238346][ T9642] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 739.238565][ T9642] __device_attach (drivers/base/dd.c:1030) 
[ 739.238765][ T9642] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 739.238962][ T9642] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 739.239163][ T9642] ? 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) 
[ 739.239370][ T9642] bus_probe_device (drivers/base/bus.c:537) 
[ 739.239600][ T9642] device_add (drivers/base/core.c:3672) 
[ 739.239812][ T9642] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 739.240014][ T9642] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 739.240235][ T9642] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 739.240509][ T9642] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 739.240784][ T9642] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 739.240984][ T9642] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 739.241190][ T9642] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 739.241386][ T9642] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 739.241605][ T9642] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 739.241766][ T9642] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 739.241965][ T9642] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 739.242179][ T9642] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 739.242436][ T9642] ksys_write (fs/read_write.c:731) 
[ 739.242601][ T9642] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 739.242803][ T9642] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 739.243015][ T9642] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 739.243225][ T9642] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  739.243479][ T9642] RIP: 0033:0x7fab14a1eb77
[ 739.243704][ T9642] 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
[  739.244409][ T9642] RSP: 002b:00007fffb17f69b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  739.244729][ T9642] RAX: ffffffffffffffda RBX: 00007fab14804140 RCX: 00007fab14a1eb77
[  739.245035][ T9642] RDX: 000000000000000b RSI: 000056353a6e9d30 RDI: 0000000000000006
[  739.245329][ T9642] RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
[  739.245633][ T9642] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fab06741700
[  739.245940][ T9642] R13: 000056353a6e9d30 R14: 0000000000000006 R15: 000056353a4c0900
| [  743.115968][ T9642] ------------[ cut here ]------------
| [ 743.116360][ T9642] WARNING: CPU: 1 PID: 9642 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) 
| [  743.116900][ T9642] Modules linked in: netdevsim psample act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router sha1_generic xfrm_user xt_length nft_compat nf_tables act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_mirred cls_u32 ifb act_gact cls_flower sch_ingress vxlan
| [  743.118914][ T9642] Tainted: [W]=WARN
[  743.119072][ T9642] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 743.119328][ T9642] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 743.119609][ T9642] 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
[  743.120324][ T9642] RSP: 0018:ffffc900009f7528 EFLAGS: 00010246
[  743.120596][ T9642] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  743.120901][ T9642] RDX: 0000000000000000 RSI: ffff88801e93acd0 RDI: ffff88801bf78b78
[  743.121209][ T9642] RBP: ffffffffac653580 R08: 0000000000000000 R09: fffffbfff5482504
[  743.121529][ T9642] R10: ffffffffaa412827 R11: ffff88801bf78040 R12: 0000000000000000
[  743.121848][ T9642] R13: ffff88801e93a130 R14: ffff88801e93a008 R15: ffff88801e93a000
[  743.122154][ T9642] FS:  00007fab148041c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[  743.122518][ T9642] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  743.122779][ T9642] CR2: 000056353a4ea900 CR3: 000000000a0f2004 CR4: 0000000000772ef0
[  743.123089][ T9642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  743.123394][ T9642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  743.123707][ T9642] PKRU: 55555554
[  743.123863][ T9642] Call Trace:
[  743.124017][ T9642]  <TASK>
[ 743.124125][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 743.124329][ T9642] ? __warn (kernel/panic.c:748) 
[ 743.124498][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 743.124720][ T9642] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 743.124937][ T9642] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 743.125096][ T9642] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 743.125302][ T9642] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 743.125543][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 743.125751][ T9642] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 743.125966][ T9642] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 743.126303][ T9642] ? _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) 
[ 743.126554][ T9642] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 743.126768][ T9642] register_netdevice (net/core/dev.c:11003) 
[ 743.126980][ T9642] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 743.127185][ T9642] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 743.127406][ T9642] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 743.127642][ T9642] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 743.127918][ T9642] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 743.128082][ T9642] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 743.128354][ T9642] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 743.128632][ T9642] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 743.128900][ T9642] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 743.129119][ T9642] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 743.129386][ T9642] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 743.129606][ T9642] ? 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)) 
[ 743.129765][ T9642] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 743.129982][ T9642] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 743.130200][ T9642] __driver_probe_device (drivers/base/dd.c:800) 
[ 743.130410][ T9642] driver_probe_device (drivers/base/dd.c:830) 
[ 743.130631][ T9642] __device_attach_driver (drivers/base/dd.c:959) 
[ 743.130844][ T9642] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 743.131099][ T9642] bus_for_each_drv (drivers/base/bus.c:462) 
[ 743.131306][ T9642] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 743.131522][ T9642] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 743.131734][ T9642] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 743.131946][ T9642] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 743.132165][ T9642] __device_attach (drivers/base/dd.c:1030) 
[ 743.132374][ T9642] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 743.132589][ T9642] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 743.132796][ T9642] ? 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) 
[ 743.133009][ T9642] bus_probe_device (drivers/base/bus.c:537) 
[ 743.133218][ T9642] device_add (drivers/base/core.c:3672) 
[ 743.133428][ T9642] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 743.133647][ T9642] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 743.133869][ T9642] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 743.134138][ T9642] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 743.134430][ T9642] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 743.134643][ T9642] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 743.134856][ T9642] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 743.135059][ T9642] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 743.135270][ T9642] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 743.135435][ T9642] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 743.135650][ T9642] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 743.135873][ T9642] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 743.136148][ T9642] ksys_write (fs/read_write.c:731) 
[ 743.136313][ T9642] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 743.136528][ T9642] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 743.136744][ T9642] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 743.136953][ T9642] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  743.137205][ T9642] RIP: 0033:0x7fab14a1eb77
[ 743.137414][ T9642] 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
[  743.138129][ T9642] RSP: 002b:00007fffb17f69b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  743.138435][ T9642] RAX: ffffffffffffffda RBX: 00007fab14804140 RCX: 00007fab14a1eb77
[  743.138750][ T9642] RDX: 0000000000000008 RSI: 000056353a6e9d30 RDI: 0000000000000006
[  743.139055][ T9642] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[  743.139358][ T9642] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fab06741700


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