======================================
| [ 3589.305975][T32057] Initializing XFRM netlink socket
| [ 3592.033755][T28853] ------------[ cut here ]------------
| [3592.034215][T28853] WARNING: CPU: 1 PID: 28853 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) 
| [ 3592.034672][T28853] Modules linked in: netdevsim psample xfrm_user macsec ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xt_HL amt ip6t_rpfilter nft_compat nf_tables vxlan mpls_gso mpls_iptunnel mpls_router
[ 3592.036104][T28853] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3592.036387][T28853] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 3592.036665][T28853] 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
[ 3592.037418][T28853] RSP: 0018:ffffc9000599f528 EFLAGS: 00010246
[ 3592.037703][T28853] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3592.038014][T28853] RDX: 0000000000000000 RSI: ffff888013652cd0 RDI: ffff88800d77d0f8
[ 3592.038338][T28853] RBP: ffffffff9e853580 R08: 0000000000000000 R09: fffffbfff38c2504
[ 3592.038658][T28853] R10: ffffffff9c612827 R11: ffff88800d77c5c0 R12: 0000000000000000
[ 3592.038978][T28853] R13: ffff888013652130 R14: ffff888013652008 R15: ffff888013652000
[ 3592.039568][T28853] FS:  00007fa4b323e740(0000) GS:ffff888065a80000(0000) knlGS:0000000000000000
[ 3592.039945][T28853] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3592.040232][T28853] CR2: 000055f786afd760 CR3: 0000000015050001 CR4: 0000000000772ef0
[ 3592.040560][T28853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3592.040878][T28853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3592.041214][T28853] PKRU: 55555554
[ 3592.041386][T28853] Call Trace:
[ 3592.041548][T28853]  <TASK>
[3592.041673][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3592.041890][T28853] ? __warn (kernel/panic.c:748) 
[3592.042052][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3592.042288][T28853] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3592.042518][T28853] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3592.042690][T28853] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3592.042912][T28853] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3592.043159][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3592.043377][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[3592.043615][T28853] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[3592.043895][T28853] ? _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) 
[3592.044133][T28853] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3592.044367][T28853] register_netdevice (net/core/dev.c:11003) 
[3592.044604][T28853] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[3592.044810][T28853] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3592.045031][T28853] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3592.045270][T28853] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3592.045554][T28853] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3592.045716][T28853] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3592.046001][T28853] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3592.046294][T28853] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3592.046583][T28853] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3592.046813][T28853] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3592.047117][T28853] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3592.047342][T28853] ? 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)) 
[3592.047514][T28853] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3592.047751][T28853] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3592.047983][T28853] __driver_probe_device (drivers/base/dd.c:800) 
[3592.048207][T28853] driver_probe_device (drivers/base/dd.c:830) 
[3592.048417][T28853] __device_attach_driver (drivers/base/dd.c:959) 
[3592.048634][T28853] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3592.048888][T28853] bus_for_each_drv (drivers/base/bus.c:462) 
[3592.049105][T28853] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3592.049313][T28853] ? bus_to_subsys (drivers/base/bus.c:85) 
[3592.049520][T28853] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3592.049726][T28853] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3592.049942][T28853] __device_attach (drivers/base/dd.c:1030) 
[3592.050167][T28853] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3592.050376][T28853] ? bus_to_subsys (drivers/base/bus.c:85) 
[3592.050586][T28853] ? 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) 
[3592.050801][T28853] bus_probe_device (drivers/base/bus.c:537) 
[3592.051013][T28853] device_add (drivers/base/core.c:3672) 
[3592.051236][T28853] ? __pfx_device_add (drivers/base/core.c:3548) 
[3592.051442][T28853] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3592.051666][T28853] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3592.051949][T28853] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3592.052266][T28853] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3592.052492][T28853] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3592.052719][T28853] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3592.052937][T28853] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3592.053170][T28853] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3592.053358][T28853] ? __pfx_vfs_write (fs/read_write.c:660) 
[3592.053581][T28853] ? __lock_release (kernel/locking/lockdep.c:5527) 
[3592.053795][T28853] ? 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) 
[3592.054021][T28853] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[3592.054263][T28853] ksys_write (fs/read_write.c:731) 
[3592.054437][T28853] ? __pfx_ksys_write (fs/read_write.c:721) 
[3592.054662][T28853] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[3592.054897][T28853] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3592.055154][T28853] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3592.055432][T28853] RIP: 0033:0x7fa4b337fb77
[ 3592.055668][T28853] 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
[ 3592.056488][T28853] RSP: 002b:00007ffc54fcaaf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3592.056971][T28853] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fa4b337fb77
[ 3592.057318][T28853] RDX: 0000000000000002 RSI: 000055f786afd760 RDI: 0000000000000001
[ 3592.057656][T28853] RBP: 000055f786afd760 R08: 0000000000000000 R09: 00007fa4b33f24e0
[ 3592.057981][T28853] R10: 00007fa4b33f23e0 R11: 0000000000000246 R12: 0000000000000002
[ 3592.058334][T28853] R13: 00007fa4b343b760 R14: 0000000000000002 R15: 00007fa4b34369c0
| [ 3599.174158][T28853] ------------[ cut here ]------------
| [3599.174685][T28853] WARNING: CPU: 1 PID: 28853 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) 
| [ 3599.175129][T28853] Modules linked in: netdevsim psample xfrm_user macsec ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xt_HL amt ip6t_rpfilter nft_compat nf_tables vxlan mpls_gso mpls_iptunnel mpls_router [last unloaded: netdevsim]
| [ 3599.176652][T28853] Tainted: [W]=WARN
[ 3599.176832][T28853] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3599.177122][T28853] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 3599.177403][T28853] 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
[ 3599.178197][T28853] RSP: 0018:ffffc9000599f528 EFLAGS: 00010246
[ 3599.178477][T28853] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3599.178801][T28853] RDX: 0000000000000000 RSI: ffff888009e4acd0 RDI: ffff88800d77d0f8
[ 3599.179125][T28853] RBP: ffffffff9e853580 R08: 0000000000000000 R09: fffffbfff38c2504
[ 3599.179462][T28853] R10: ffffffff9c612827 R11: ffff88800d77c5c0 R12: 0000000000000000
[ 3599.179775][T28853] R13: ffff888009e4a130 R14: ffff888009e4a008 R15: ffff888009e4a000
[ 3599.180119][T28853] FS:  00007fa4b323e740(0000) GS:ffff888065a80000(0000) knlGS:0000000000000000
[ 3599.180485][T28853] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3599.180757][T28853] CR2: 000055f786afd760 CR3: 0000000015050003 CR4: 0000000000772ef0
[ 3599.181070][T28853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3599.181389][T28853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3599.181707][T28853] PKRU: 55555554
[ 3599.181863][T28853] Call Trace:
[ 3599.182019][T28853]  <TASK>
[3599.182150][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3599.182374][T28853] ? __warn (kernel/panic.c:748) 
[3599.182535][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3599.182760][T28853] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3599.182973][T28853] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3599.183158][T28853] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3599.183367][T28853] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3599.183606][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3599.183814][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[3599.184050][T28853] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[3599.184330][T28853] ? _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) 
[3599.184560][T28853] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3599.184775][T28853] register_netdevice (net/core/dev.c:11003) 
[3599.184994][T28853] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[3599.185215][T28853] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3599.185443][T28853] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3599.185668][T28853] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3599.185935][T28853] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3599.186118][T28853] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3599.186393][T28853] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3599.186685][T28853] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3599.186958][T28853] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3599.187192][T28853] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3599.187458][T28853] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3599.187669][T28853] ? 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)) 
[3599.187835][T28853] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3599.188046][T28853] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3599.188269][T28853] __driver_probe_device (drivers/base/dd.c:800) 
[3599.188480][T28853] driver_probe_device (drivers/base/dd.c:830) 
[3599.188683][T28853] __device_attach_driver (drivers/base/dd.c:959) 
[3599.188892][T28853] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3599.189153][T28853] bus_for_each_drv (drivers/base/bus.c:462) 
[3599.189356][T28853] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3599.189556][T28853] ? bus_to_subsys (drivers/base/bus.c:85) 
[3599.189759][T28853] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3599.189963][T28853] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3599.190180][T28853] __device_attach (drivers/base/dd.c:1030) 
[3599.190384][T28853] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3599.190583][T28853] ? bus_to_subsys (drivers/base/bus.c:85) 
[3599.190784][T28853] ? 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) 
[3599.190992][T28853] bus_probe_device (drivers/base/bus.c:537) 
[3599.191210][T28853] device_add (drivers/base/core.c:3672) 
[3599.191423][T28853] ? __pfx_device_add (drivers/base/core.c:3548) 
[3599.191624][T28853] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3599.191839][T28853] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3599.192118][T28853] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3599.192423][T28853] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3599.192631][T28853] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3599.192842][T28853] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3599.193050][T28853] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3599.193282][T28853] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3599.193471][T28853] ? __pfx_vfs_write (fs/read_write.c:660) 
[3599.193685][T28853] ? __lock_release (kernel/locking/lockdep.c:5527) 
[3599.193890][T28853] ? 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) 
[3599.194119][T28853] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[3599.194365][T28853] ksys_write (fs/read_write.c:731) 
[3599.194525][T28853] ? __pfx_ksys_write (fs/read_write.c:721) 
[3599.194745][T28853] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[3599.194965][T28853] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3599.195202][T28853] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3599.195475][T28853] RIP: 0033:0x7fa4b337fb77
[ 3599.195687][T28853] 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
[ 3599.196440][T28853] RSP: 002b:00007ffc54fcb6d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3599.196755][T28853] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fa4b337fb77
[ 3599.197057][T28853] RDX: 0000000000000005 RSI: 000055f786afd760 RDI: 0000000000000001
[ 3599.197372][T28853] RBP: 000055f786afd760 R08: 0000000000000000 R09: 00007fa4b33f24e0
[ 3599.197684][T28853] R10: 00007fa4b33f23e0 R11: 0000000000000246 R12: 0000000000000005
[ 3599.197996][T28853] R13: 00007fa4b343b760 R14: 0000000000000005 R15: 00007fa4b34369c0
| [ 3599.218585][T28853] ------------[ cut here ]------------
| [3599.218920][T28853] WARNING: CPU: 2 PID: 28853 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) 
| [ 3599.219385][T28853] Modules linked in: netdevsim psample xfrm_user macsec ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xt_HL amt ip6t_rpfilter nft_compat nf_tables vxlan mpls_gso mpls_iptunnel mpls_router [last unloaded: netdevsim]
| [ 3599.220961][T28853] Tainted: [W]=WARN
[ 3599.221167][T28853] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3599.221455][T28853] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 3599.221748][T28853] 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
[ 3599.222533][T28853] RSP: 0018:ffffc9000599f528 EFLAGS: 00010246
[ 3599.222827][T28853] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3599.223172][T28853] RDX: 0000000000000000 RSI: ffff88800503acd0 RDI: ffff88800d77d0f8
[ 3599.223511][T28853] RBP: ffffffff9e853580 R08: 0000000000000000 R09: fffffbfff38c2504
[ 3599.223848][T28853] R10: ffffffff9c612827 R11: ffff88800d77c5c0 R12: 0000000000000000
[ 3599.224206][T28853] R13: ffff88800503a130 R14: ffff88800503a008 R15: ffff88800503a000
[ 3599.224680][T28853] FS:  00007fa4b323e740(0000) GS:ffff888065b00000(0000) knlGS:0000000000000000
[ 3599.225076][T28853] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3599.225381][T28853] CR2: 00007fa4b32daf00 CR3: 0000000015050002 CR4: 0000000000772ef0
[ 3599.225733][T28853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3599.226060][T28853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3599.226420][T28853] PKRU: 55555554
[ 3599.226601][T28853] Call Trace:
[ 3599.226784][T28853]  <TASK>
[3599.226911][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3599.227156][T28853] ? __warn (kernel/panic.c:748) 
[3599.227344][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3599.227578][T28853] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3599.227818][T28853] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3599.227999][T28853] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3599.228240][T28853] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3599.228485][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3599.228717][T28853] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[3599.228951][T28853] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[3599.229271][T28853] ? _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) 
[3599.229513][T28853] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3599.229754][T28853] register_netdevice (net/core/dev.c:11003) 
[3599.229993][T28853] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[3599.230233][T28853] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3599.230488][T28853] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3599.230747][T28853] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3599.231035][T28853] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3599.231224][T28853] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3599.231523][T28853] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3599.231811][T28853] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3599.232109][T28853] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3599.232390][T28853] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3599.232686][T28853] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3599.232918][T28853] ? 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)) 
[3599.233111][T28853] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3599.233352][T28853] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3599.233611][T28853] __driver_probe_device (drivers/base/dd.c:800) 
[3599.233857][T28853] driver_probe_device (drivers/base/dd.c:830) 
[3599.234118][T28853] __device_attach_driver (drivers/base/dd.c:959) 
[3599.234353][T28853] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3599.234630][T28853] bus_for_each_drv (drivers/base/bus.c:462) 
[3599.234857][T28853] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3599.235082][T28853] ? bus_to_subsys (drivers/base/bus.c:85) 
[3599.235320][T28853] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3599.235548][T28853] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3599.235784][T28853] __device_attach (drivers/base/dd.c:1030) 
[3599.236012][T28853] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3599.236257][T28853] ? bus_to_subsys (drivers/base/bus.c:85) 
[3599.236489][T28853] ? 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) 
[3599.236728][T28853] bus_probe_device (drivers/base/bus.c:537) 
[3599.236958][T28853] device_add (drivers/base/core.c:3672) 
[3599.237199][T28853] ? __pfx_device_add (drivers/base/core.c:3548) 
[3599.237429][T28853] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3599.237673][T28853] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3599.237960][T28853] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3599.238272][T28853] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3599.238512][T28853] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3599.238745][T28853] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3599.238962][T28853] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3599.239211][T28853] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3599.239398][T28853] ? __pfx_vfs_write (fs/read_write.c:660) 
[3599.239636][T28853] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[3599.239871][T28853] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3599.240123][T28853] ksys_write (fs/read_write.c:731) 
[3599.240308][T28853] ? __pfx_ksys_write (fs/read_write.c:721) 
[3599.240553][T28853] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3599.240802][T28853] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3599.241088][T28853] RIP: 0033:0x7fa4b337fb77
[ 3599.241337][T28853] 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
[ 3599.242116][T28853] RSP: 002b:00007ffc54fcb938 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3599.242475][T28853] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fa4b337fb77
[ 3599.242818][T28853] RDX: 0000000000000005 RSI: 000055f786afd760 RDI: 0000000000000001
[ 3599.243165][T28853] RBP: 000055f786afd760 R08: 0000000000000000 R09: 00007fa4b33f24e0
[ 3599.243504][T28853] R10: 00007fa4b33f23e0 R11: 0000000000000246 R12: 0000000000000005


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