======================================
| [  731.253928][ T8862] Initializing XFRM netlink socket
| [  733.896705][ T5658] ------------[ cut here ]------------
| [ 733.897120][ T5658] WARNING: CPU: 0 PID: 5658 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) 
| [  733.897573][ T5658] Modules linked in: netdevsim xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh
[  733.898969][ T5658] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 733.899254][ T5658] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 733.899546][ T5658] 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
[  733.900331][ T5658] RSP: 0018:ffffc90005ac7528 EFLAGS: 00010246
[  733.900615][ T5658] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  733.900968][ T5658] RDX: 0000000000000000 RSI: ffff88800cfc2cd0 RDI: ffff88805a02d0f8
[  733.901299][ T5658] RBP: ffffffffa3653580 R08: 0000000000000000 R09: fffffbfff4282504
[  733.901618][ T5658] R10: ffffffffa1412827 R11: ffff88805a02c5c0 R12: 0000000000000000
[  733.901940][ T5658] R13: ffff88800cfc2130 R14: ffff88800cfc2008 R15: ffff88800cfc2000
[  733.902269][ T5658] FS:  00007fccbdb1f740(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[  733.902640][ T5658] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  733.902906][ T5658] CR2: 00005593e03db760 CR3: 000000000bd64005 CR4: 0000000000772ef0
[  733.903369][ T5658] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  733.903696][ T5658] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  733.904013][ T5658] PKRU: 55555554
[  733.904194][ T5658] Call Trace:
[  733.904359][ T5658]  <TASK>
[ 733.904473][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 733.904712][ T5658] ? __warn (kernel/panic.c:748) 
[ 733.904893][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 733.905120][ T5658] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 733.905336][ T5658] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 733.905501][ T5658] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 733.905725][ T5658] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 733.905957][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 733.906186][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 733.906410][ T5658] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 733.906688][ T5658] ? _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) 
[ 733.906912][ T5658] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 733.907147][ T5658] register_netdevice (net/core/dev.c:11003) 
[ 733.907374][ T5658] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 733.907584][ T5658] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 733.907810][ T5658] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 733.908037][ T5658] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 733.908324][ T5658] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 733.908487][ T5658] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 733.908768][ T5658] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 733.909037][ T5658] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 733.909322][ T5658] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 733.909548][ T5658] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 733.909818][ T5658] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 733.910036][ T5658] ? 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)) 
[ 733.910213][ T5658] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 733.910450][ T5658] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 733.910682][ T5658] __driver_probe_device (drivers/base/dd.c:800) 
[ 733.910900][ T5658] driver_probe_device (drivers/base/dd.c:830) 
[ 733.911133][ T5658] __device_attach_driver (drivers/base/dd.c:959) 
[ 733.911358][ T5658] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 733.911633][ T5658] bus_for_each_drv (drivers/base/bus.c:462) 
[ 733.911857][ T5658] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 733.912089][ T5658] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 733.912317][ T5658] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 733.912538][ T5658] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 733.912767][ T5658] __device_attach (drivers/base/dd.c:1030) 
[ 733.912989][ T5658] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 733.913219][ T5658] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 733.913440][ T5658] ? 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) 
[ 733.913673][ T5658] bus_probe_device (drivers/base/bus.c:537) 
[ 733.913903][ T5658] device_add (drivers/base/core.c:3672) 
[ 733.914139][ T5658] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 733.914368][ T5658] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 733.914602][ T5658] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 733.914914][ T5658] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 733.915213][ T5658] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 733.915436][ T5658] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 733.915666][ T5658] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 733.915886][ T5658] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 733.916134][ T5658] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 733.916313][ T5658] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 733.916541][ T5658] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 733.916762][ T5658] ? 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) 
[ 733.917000][ T5658] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 733.917240][ T5658] ksys_write (fs/read_write.c:731) 
[ 733.917411][ T5658] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 733.917632][ T5658] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 733.917868][ T5658] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 733.918105][ T5658] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  733.918377][ T5658] RIP: 0033:0x7fccbdc60b77
[ 733.918615][ T5658] 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
[  733.919392][ T5658] RSP: 002b:00007ffd2f08e368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  733.919728][ T5658] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fccbdc60b77
[  733.920074][ T5658] RDX: 0000000000000002 RSI: 00005593e03db760 RDI: 0000000000000001
[  733.920409][ T5658] RBP: 00005593e03db760 R08: 0000000000000000 R09: 00007fccbdcd34e0
[  733.920741][ T5658] R10: 00007fccbdcd33e0 R11: 0000000000000246 R12: 0000000000000002
[  733.921086][ T5658] R13: 00007fccbdd1c760 R14: 0000000000000002 R15: 00007fccbdd179c0
| [  740.939366][ T5658] ------------[ cut here ]------------
| [ 740.939711][ T5658] WARNING: CPU: 0 PID: 5658 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) 
| [  740.940184][ T5658] Modules linked in: netdevsim xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh [last unloaded: netdevsim]
| [  740.941780][ T5658] Tainted: [W]=WARN
[  740.941972][ T5658] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 740.942245][ T5658] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 740.942521][ T5658] 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
[  740.943279][ T5658] RSP: 0018:ffffc90005ac7528 EFLAGS: 00010246
[  740.943556][ T5658] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  740.943873][ T5658] RDX: 0000000000000000 RSI: ffff888059c52cd0 RDI: ffff88805a02d0f8
[  740.944280][ T5658] RBP: ffffffffa3653580 R08: 0000000000000000 R09: fffffbfff4282504
[  740.944599][ T5658] R10: ffffffffa1412827 R11: ffff88805a02c5c0 R12: 0000000000000000
[  740.944928][ T5658] R13: ffff888059c52130 R14: ffff888059c52008 R15: ffff888059c52000
[  740.945258][ T5658] FS:  00007fccbdb1f740(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[  740.945635][ T5658] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  740.945908][ T5658] CR2: 00005593e03db760 CR3: 000000000bd64001 CR4: 0000000000772ef0
[  740.946234][ T5658] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  740.946550][ T5658] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  740.946865][ T5658] PKRU: 55555554
[  740.947031][ T5658] Call Trace:
[  740.947205][ T5658]  <TASK>
[ 740.947321][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 740.947540][ T5658] ? __warn (kernel/panic.c:748) 
[ 740.947714][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 740.947933][ T5658] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 740.948169][ T5658] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 740.948334][ T5658] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 740.948546][ T5658] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 740.948772][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 740.948990][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 740.949257][ T5658] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 740.949528][ T5658] ? _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) 
[ 740.949748][ T5658] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 740.949966][ T5658] register_netdevice (net/core/dev.c:11003) 
[ 740.950196][ T5658] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 740.950409][ T5658] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 740.950637][ T5658] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 740.950871][ T5658] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 740.951153][ T5658] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 740.951322][ T5658] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 740.951602][ T5658] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 740.951877][ T5658] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 740.952166][ T5658] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 740.952399][ T5658] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 740.952672][ T5658] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 740.952889][ T5658] ? 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)) 
[ 740.953065][ T5658] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 740.953289][ T5658] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 740.953509][ T5658] __driver_probe_device (drivers/base/dd.c:800) 
[ 740.953726][ T5658] driver_probe_device (drivers/base/dd.c:830) 
[ 740.953947][ T5658] __device_attach_driver (drivers/base/dd.c:959) 
[ 740.954177][ T5658] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 740.954442][ T5658] bus_for_each_drv (drivers/base/bus.c:462) 
[ 740.954657][ T5658] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 740.954878][ T5658] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 740.955102][ T5658] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 740.955317][ T5658] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 740.955544][ T5658] __device_attach (drivers/base/dd.c:1030) 
[ 740.955757][ T5658] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 740.955970][ T5658] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 740.956197][ T5658] ? 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) 
[ 740.956427][ T5658] bus_probe_device (drivers/base/bus.c:537) 
[ 740.956646][ T5658] device_add (drivers/base/core.c:3672) 
[ 740.956864][ T5658] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 740.957090][ T5658] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 740.957317][ T5658] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 740.957597][ T5658] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 740.957876][ T5658] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 740.958098][ T5658] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 740.958320][ T5658] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 740.958531][ T5658] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 740.958756][ T5658] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 740.958927][ T5658] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 740.959160][ T5658] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 740.959372][ T5658] ? 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) 
[ 740.959595][ T5658] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 740.959817][ T5658] ksys_write (fs/read_write.c:731) 
[ 740.959983][ T5658] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 740.960215][ T5658] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 740.960442][ T5658] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 740.960660][ T5658] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  740.960922][ T5658] RIP: 0033:0x7fccbdc60b77
[ 740.961156][ T5658] 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
[  740.961902][ T5658] RSP: 002b:00007ffd2f08ef48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  740.962228][ T5658] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fccbdc60b77
[  740.962555][ T5658] RDX: 0000000000000005 RSI: 00005593e03db760 RDI: 0000000000000001
[  740.962873][ T5658] RBP: 00005593e03db760 R08: 0000000000000000 R09: 00007fccbdcd34e0
[  740.963207][ T5658] R10: 00007fccbdcd33e0 R11: 0000000000000246 R12: 0000000000000005
[  740.963522][ T5658] R13: 00007fccbdd1c760 R14: 0000000000000005 R15: 00007fccbdd179c0
| [  740.993370][ T5658] ------------[ cut here ]------------
| [ 740.993790][ T5658] WARNING: CPU: 1 PID: 5658 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) 
| [  740.994314][ T5658] Modules linked in: netdevsim xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh [last unloaded: netdevsim]
| [  740.996065][ T5658] Tainted: [W]=WARN
[  740.996243][ T5658] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 740.996531][ T5658] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 740.996823][ T5658] 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
[  740.997630][ T5658] RSP: 0018:ffffc90005ac7528 EFLAGS: 00010246
[  740.997922][ T5658] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  740.998268][ T5658] RDX: 0000000000000000 RSI: ffff88801ec1acd0 RDI: ffff88805a02d0f8
[  740.998617][ T5658] RBP: ffffffffa3653580 R08: 0000000000000000 R09: fffffbfff4282504
[  740.998960][ T5658] R10: ffffffffa1412827 R11: ffff88805a02c5c0 R12: 0000000000000000
[  740.999310][ T5658] R13: ffff88801ec1a130 R14: ffff88801ec1a008 R15: ffff88801ec1a000
[  740.999656][ T5658] FS:  00007fccbdb1f740(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[  741.000065][ T5658] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  741.000356][ T5658] CR2: 00005593b83e29f0 CR3: 000000000bd64005 CR4: 0000000000772ef0
[  741.000693][ T5658] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  741.001030][ T5658] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  741.001435][ T5658] PKRU: 55555554
[  741.001607][ T5658] Call Trace:
[  741.001774][ T5658]  <TASK>
[ 741.001889][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 741.002121][ T5658] ? __warn (kernel/panic.c:748) 
[ 741.002294][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 741.002518][ T5658] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 741.002746][ T5658] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 741.002914][ T5658] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 741.003151][ T5658] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 741.003390][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 741.003611][ T5658] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 741.003865][ T5658] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 741.004239][ T5658] ? _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) 
[ 741.004504][ T5658] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 741.004739][ T5658] register_netdevice (net/core/dev.c:11003) 
[ 741.004976][ T5658] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 741.005204][ T5658] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 741.005441][ T5658] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 741.005742][ T5658] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 741.006114][ T5658] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 741.006341][ T5658] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 741.006638][ T5658] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 741.006924][ T5658] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 741.007217][ T5658] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 741.007451][ T5658] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 741.007804][ T5658] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 741.008100][ T5658] ? 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)) 
[ 741.008326][ T5658] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 741.008628][ T5658] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 741.008881][ T5658] __driver_probe_device (drivers/base/dd.c:800) 
[ 741.009119][ T5658] driver_probe_device (drivers/base/dd.c:830) 
[ 741.009345][ T5658] __device_attach_driver (drivers/base/dd.c:959) 
[ 741.009573][ T5658] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 741.009845][ T5658] bus_for_each_drv (drivers/base/bus.c:462) 
[ 741.010105][ T5658] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 741.010393][ T5658] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 741.010656][ T5658] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 741.010877][ T5658] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 741.011114][ T5658] __device_attach (drivers/base/dd.c:1030) 
[ 741.011337][ T5658] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 741.011556][ T5658] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 741.011783][ T5658] ? 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) 
[ 741.012012][ T5658] bus_probe_device (drivers/base/bus.c:537) 
[ 741.012245][ T5658] device_add (drivers/base/core.c:3672) 
[ 741.012470][ T5658] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 741.012690][ T5658] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 741.012925][ T5658] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 741.013224][ T5658] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 741.013520][ T5658] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 741.013778][ T5658] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 741.014079][ T5658] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 741.014364][ T5658] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 741.014608][ T5658] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 741.014796][ T5658] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 741.015024][ T5658] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 741.015265][ T5658] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 741.015515][ T5658] ksys_write (fs/read_write.c:731) 
[ 741.015734][ T5658] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 741.016032][ T5658] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 741.016327][ T5658] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  741.016617][ T5658] RIP: 0033:0x7fccbdc60b77
[ 741.016845][ T5658] 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
[  741.017759][ T5658] RSP: 002b:00007ffd2f08f1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  741.018100][ T5658] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fccbdc60b77
[  741.018452][ T5658] RDX: 0000000000000005 RSI: 00005593e03db760 RDI: 0000000000000001
[  741.018880][ T5658] RBP: 00005593e03db760 R08: 0000000000000000 R09: 00007fccbdcd34e0
[  741.019238][ T5658] R10: 00007fccbdcd33e0 R11: 0000000000000246 R12: 0000000000000005


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