======================================
| [ 3601.477810][T31897] Initializing XFRM netlink socket
| [ 3604.020705][T28694] ------------[ cut here ]------------
| [3604.021135][T28694] WARNING: CPU: 3 PID: 28694 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) 
| [ 3604.021685][T28694] 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
[ 3604.023156][T28694] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3604.023441][T28694] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 3604.023722][T28694] 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
[ 3604.024485][T28694] RSP: 0018:ffffc90005a7f528 EFLAGS: 00010246
[ 3604.024763][T28694] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3604.025088][T28694] RDX: 0000000000000000 RSI: ffff888011f32cd0 RDI: ffff888011ad8b78
[ 3604.025568][T28694] RBP: ffffffff9d053580 R08: 0000000000000000 R09: fffffbfff35c2504
[ 3604.025894][T28694] R10: ffffffff9ae12827 R11: ffff888011ad8040 R12: 0000000000000000
[ 3604.026226][T28694] R13: ffff888011f32130 R14: ffff888011f32008 R15: ffff888011f32000
[ 3604.026563][T28694] FS:  00007fc2245e2740(0000) GS:ffff888065980000(0000) knlGS:0000000000000000
[ 3604.026939][T28694] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3604.027212][T28694] CR2: 000055e0a3cf4760 CR3: 0000000016722006 CR4: 0000000000772ef0
[ 3604.027560][T28694] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3604.027886][T28694] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3604.028212][T28694] PKRU: 55555554
[ 3604.028391][T28694] Call Trace:
[ 3604.028560][T28694]  <TASK>
[3604.028674][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3604.028901][T28694] ? __warn (kernel/panic.c:748) 
[3604.029070][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3604.029299][T28694] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3604.029524][T28694] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3604.029689][T28694] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3604.029911][T28694] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3604.030141][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3604.030371][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[3604.030622][T28694] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[3604.030904][T28694] ? _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) 
[3604.031130][T28694] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3604.031366][T28694] register_netdevice (net/core/dev.c:11003) 
[3604.031596][T28694] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[3604.031825][T28694] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3604.032057][T28694] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3604.032302][T28694] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3604.032578][T28694] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3604.032745][T28694] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3604.033030][T28694] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3604.033314][T28694] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3604.033600][T28694] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3604.033830][T28694] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3604.034107][T28694] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3604.034335][T28694] ? 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)) 
[3604.034502][T28694] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3604.034728][T28694] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3604.034949][T28694] __driver_probe_device (drivers/base/dd.c:800) 
[3604.035174][T28694] driver_probe_device (drivers/base/dd.c:830) 
[3604.035411][T28694] __device_attach_driver (drivers/base/dd.c:959) 
[3604.035634][T28694] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3604.035898][T28694] bus_for_each_drv (drivers/base/bus.c:462) 
[3604.036116][T28694] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3604.036345][T28694] ? bus_to_subsys (drivers/base/bus.c:85) 
[3604.036581][T28694] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3604.036805][T28694] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3604.037032][T28694] __device_attach (drivers/base/dd.c:1030) 
[3604.037256][T28694] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3604.037494][T28694] ? bus_to_subsys (drivers/base/bus.c:85) 
[3604.037718][T28694] ? 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) 
[3604.037942][T28694] bus_probe_device (drivers/base/bus.c:537) 
[3604.038165][T28694] device_add (drivers/base/core.c:3672) 
[3604.038400][T28694] ? __pfx_device_add (drivers/base/core.c:3548) 
[3604.038613][T28694] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3604.038839][T28694] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3604.039119][T28694] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3604.039438][T28694] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3604.039658][T28694] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3604.039887][T28694] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3604.040109][T28694] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3604.040351][T28694] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3604.040530][T28694] ? __pfx_vfs_write (fs/read_write.c:660) 
[3604.040759][T28694] ? __lock_release (kernel/locking/lockdep.c:5527) 
[3604.040978][T28694] ? 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) 
[3604.041218][T28694] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[3604.041449][T28694] ksys_write (fs/read_write.c:731) 
[3604.041617][T28694] ? __pfx_ksys_write (fs/read_write.c:721) 
[3604.041839][T28694] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[3604.042089][T28694] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3604.042325][T28694] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3604.042597][T28694] RIP: 0033:0x7fc224723b77
[ 3604.042968][T28694] 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
[ 3604.043742][T28694] RSP: 002b:00007ffc89302ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3604.044071][T28694] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc224723b77
[ 3604.044401][T28694] RDX: 0000000000000002 RSI: 000055e0a3cf4760 RDI: 0000000000000001
[ 3604.044727][T28694] RBP: 000055e0a3cf4760 R08: 0000000000000000 R09: 00007fc2247964e0
[ 3604.045055][T28694] R10: 00007fc2247963e0 R11: 0000000000000246 R12: 0000000000000002
[ 3604.045392][T28694] R13: 00007fc2247df760 R14: 0000000000000002 R15: 00007fc2247da9c0
| [ 3611.054172][T28694] ------------[ cut here ]------------
| [3611.054654][T28694] WARNING: CPU: 2 PID: 28694 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) 
| [ 3611.055115][T28694] 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]
| [ 3611.056673][T28694] Tainted: [W]=WARN
[ 3611.056874][T28694] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3611.057157][T28694] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 3611.057466][T28694] 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
[ 3611.058215][T28694] RSP: 0018:ffffc90005a7f528 EFLAGS: 00010246
[ 3611.058513][T28694] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3611.058836][T28694] RDX: 0000000000000000 RSI: ffff888005b3acd0 RDI: ffff888011ad8b78
[ 3611.059358][T28694] RBP: ffffffff9d053580 R08: 0000000000000000 R09: fffffbfff35c2504
[ 3611.059696][T28694] R10: ffffffff9ae12827 R11: ffff888011ad8040 R12: 0000000000000000
[ 3611.060031][T28694] R13: ffff888005b3a130 R14: ffff888005b3a008 R15: ffff888005b3a000
[ 3611.060368][T28694] FS:  00007fc2245e2740(0000) GS:ffff888065900000(0000) knlGS:0000000000000000
[ 3611.060748][T28694] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3611.061024][T28694] CR2: 000055e0a3cf4760 CR3: 0000000016722004 CR4: 0000000000772ef0
[ 3611.061363][T28694] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3611.061697][T28694] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3611.062020][T28694] PKRU: 55555554
[ 3611.062198][T28694] Call Trace:
[ 3611.062387][T28694]  <TASK>
[3611.062511][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3611.062740][T28694] ? __warn (kernel/panic.c:748) 
[3611.062918][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3611.063157][T28694] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3611.063400][T28694] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3611.063581][T28694] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3611.063806][T28694] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3611.064047][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3611.064286][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[3611.064518][T28694] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[3611.064806][T28694] ? _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) 
[3611.065037][T28694] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3611.065281][T28694] register_netdevice (net/core/dev.c:11003) 
[3611.065512][T28694] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[3611.065738][T28694] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3611.065977][T28694] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3611.066225][T28694] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3611.066517][T28694] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3611.066699][T28694] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3611.066987][T28694] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3611.067283][T28694] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3611.067576][T28694] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3611.067822][T28694] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3611.068101][T28694] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3611.068344][T28694] ? 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)) 
[3611.068519][T28694] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3611.068754][T28694] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3611.068991][T28694] __driver_probe_device (drivers/base/dd.c:800) 
[3611.069219][T28694] driver_probe_device (drivers/base/dd.c:830) 
[3611.069469][T28694] __device_attach_driver (drivers/base/dd.c:959) 
[3611.069703][T28694] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3611.069977][T28694] bus_for_each_drv (drivers/base/bus.c:462) 
[3611.070208][T28694] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3611.070442][T28694] ? bus_to_subsys (drivers/base/bus.c:85) 
[3611.070673][T28694] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3611.070897][T28694] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3611.071131][T28694] __device_attach (drivers/base/dd.c:1030) 
[3611.071372][T28694] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3611.071601][T28694] ? bus_to_subsys (drivers/base/bus.c:85) 
[3611.071834][T28694] ? 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) 
[3611.072070][T28694] bus_probe_device (drivers/base/bus.c:537) 
[3611.072313][T28694] device_add (drivers/base/core.c:3672) 
[3611.072542][T28694] ? __pfx_device_add (drivers/base/core.c:3548) 
[3611.072773][T28694] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3611.073013][T28694] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3611.073320][T28694] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3611.073610][T28694] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3611.073837][T28694] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3611.074073][T28694] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3611.074315][T28694] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3611.074564][T28694] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3611.074750][T28694] ? __pfx_vfs_write (fs/read_write.c:660) 
[3611.074985][T28694] ? __lock_release (kernel/locking/lockdep.c:5527) 
[3611.075207][T28694] ? 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) 
[3611.075456][T28694] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[3611.075690][T28694] ksys_write (fs/read_write.c:731) 
[3611.075868][T28694] ? __pfx_ksys_write (fs/read_write.c:721) 
[3611.076093][T28694] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[3611.076348][T28694] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3611.076578][T28694] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3611.076855][T28694] RIP: 0033:0x7fc224723b77
[ 3611.077085][T28694] 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
[ 3611.077852][T28694] RSP: 002b:00007ffc89303698 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3611.078184][T28694] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc224723b77
[ 3611.078514][T28694] RDX: 0000000000000005 RSI: 000055e0a3cf4760 RDI: 0000000000000001
[ 3611.078841][T28694] RBP: 000055e0a3cf4760 R08: 0000000000000000 R09: 00007fc2247964e0
[ 3611.079180][T28694] R10: 00007fc2247963e0 R11: 0000000000000246 R12: 0000000000000005
[ 3611.079521][T28694] R13: 00007fc2247df760 R14: 0000000000000005 R15: 00007fc2247da9c0
| [ 3611.109188][T28694] ------------[ cut here ]------------
| [3611.109590][T28694] WARNING: CPU: 0 PID: 28694 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) 
| [ 3611.110001][T28694] 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]
| [ 3611.111497][T28694] Tainted: [W]=WARN
[ 3611.111657][T28694] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[3611.111912][T28694] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 3611.112175][T28694] 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
[ 3611.112901][T28694] RSP: 0018:ffffc90005a7f528 EFLAGS: 00010246
[ 3611.113164][T28694] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 3611.113487][T28694] RDX: 0000000000000000 RSI: ffff888010a4acd0 RDI: ffff888011ad8b78
[ 3611.113799][T28694] RBP: ffffffff9d053580 R08: 0000000000000000 R09: fffffbfff35c2504
[ 3611.114106][T28694] R10: ffffffff9ae12827 R11: ffff888011ad8040 R12: 0000000000000000
[ 3611.114421][T28694] R13: ffff888010a4a130 R14: ffff888010a4a008 R15: ffff888010a4a000
[ 3611.114731][T28694] FS:  00007fc2245e2740(0000) GS:ffff888065800000(0000) knlGS:0000000000000000
[ 3611.115091][T28694] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3611.115362][T28694] CR2: 00007fc224783c8c CR3: 0000000016722003 CR4: 0000000000772ef0
[ 3611.115796][T28694] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3611.116108][T28694] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 3611.116430][T28694] PKRU: 55555554
[ 3611.116602][T28694] Call Trace:
[ 3611.116764][T28694]  <TASK>
[3611.116871][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3611.117083][T28694] ? __warn (kernel/panic.c:748) 
[3611.117245][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3611.117474][T28694] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[3611.117693][T28694] ? handle_bug (arch/x86/kernel/traps.c:285) 
[3611.117856][T28694] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[3611.118067][T28694] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[3611.118310][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[3611.118521][T28694] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[3611.118734][T28694] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[3611.119001][T28694] ? _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) 
[3611.119222][T28694] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[3611.119454][T28694] register_netdevice (net/core/dev.c:11003) 
[3611.119679][T28694] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[3611.119886][T28694] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[3611.120110][T28694] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[3611.120355][T28694] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[3611.120626][T28694] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[3611.120788][T28694] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[3611.121064][T28694] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[3611.121340][T28694] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[3611.121615][T28694] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[3611.121836][T28694] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[3611.122099][T28694] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[3611.122317][T28694] ? 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)) 
[3611.122475][T28694] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[3611.122702][T28694] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[3611.122921][T28694] __driver_probe_device (drivers/base/dd.c:800) 
[3611.123135][T28694] driver_probe_device (drivers/base/dd.c:830) 
[3611.123357][T28694] __device_attach_driver (drivers/base/dd.c:959) 
[3611.123572][T28694] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[3611.123827][T28694] bus_for_each_drv (drivers/base/bus.c:462) 
[3611.124038][T28694] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[3611.124246][T28694] ? bus_to_subsys (drivers/base/bus.c:85) 
[3611.124465][T28694] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3611.124673][T28694] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[3611.124888][T28694] __device_attach (drivers/base/dd.c:1030) 
[3611.125099][T28694] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[3611.125493][T28694] ? bus_to_subsys (drivers/base/bus.c:85) 
[3611.125707][T28694] ? 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) 
[3611.125922][T28694] bus_probe_device (drivers/base/bus.c:537) 
[3611.126140][T28694] device_add (drivers/base/core.c:3672) 
[3611.126368][T28694] ? __pfx_device_add (drivers/base/core.c:3548) 
[3611.126580][T28694] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[3611.126801][T28694] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[3611.127069][T28694] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[3611.127358][T28694] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3611.127573][T28694] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[3611.127788][T28694] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[3611.127992][T28694] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[3611.128371][T28694] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[3611.128541][T28694] ? __pfx_vfs_write (fs/read_write.c:660) 
[3611.128758][T28694] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[3611.128981][T28694] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[3611.129200][T28694] ksys_write (fs/read_write.c:731) 
[3611.129371][T28694] ? __pfx_ksys_write (fs/read_write.c:721) 
[3611.129595][T28694] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[3611.129804][T28694] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 3611.130063][T28694] RIP: 0033:0x7fc224723b77
[ 3611.130424][T28694] Code: Unable to access opcode bytes at 0x7fc224723b4d.

Code starting with the faulting instruction
===========================================
[ 3611.130713][T28694] RSP: 002b:00007ffc893038f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 3611.131162][T28694] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc224723b77
[ 3611.131489][T28694] RDX: 0000000000000005 RSI: 000055e0a3cf4760 RDI: 0000000000000001
[ 3611.131806][T28694] RBP: 000055e0a3cf4760 R08: 0000000000000000 R09: 00007fc2247964e0
[ 3611.132252][T28694] R10: 00007fc2247963e0 R11: 0000000000000246 R12: 0000000000000005


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