======================================
| [  169.568488][ T3846] Initializing XFRM netlink socket
| [  172.143366][  T637] ------------[ cut here ]------------
| [ 172.143771][ T637] WARNING: CPU: 1 PID: 637 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:10596) 
| [  172.144321][  T637] Modules linked in: netdevsim psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb
[  172.145185][  T637] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 172.145456][ T637] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 172.145736][ T637] Code: 00 e8 13 47 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 5f 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:	13 47 fe             	adc    -0x2(%rdi),%eax
   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 5f 99 00       	call   0x995fb9
  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
[  172.146507][  T637] RSP: 0018:ffffc90001737528 EFLAGS: 00010246
[  172.146779][  T637] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  172.147103][  T637] RDX: 0000000000000000 RSI: ffff8880057eacd0 RDI: ffff88800bf2d0f8
[  172.147420][  T637] RBP: ffffffff8cc53580 R08: 0000000000000000 R09: fffffbfff1542504
[  172.147736][  T637] R10: ffffffff8aa12827 R11: ffff88800bf2c5c0 R12: 0000000000000000
[  172.148066][  T637] R13: ffff8880057ea130 R14: ffff8880057ea008 R15: ffff8880057ea000
[  172.148396][  T637] FS:  00007fe879729740(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[  172.148756][  T637] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  172.149044][  T637] CR2: 000056234c686760 CR3: 000000000ca86006 CR4: 0000000000772ef0
[  172.149362][  T637] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  172.149672][  T637] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  172.149997][  T637] PKRU: 55555554
[  172.150162][  T637] Call Trace:
[  172.150324][  T637]  <TASK>
[ 172.150437][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 172.150767][ T637] ? __warn (kernel/panic.c:748) 
[ 172.150959][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 172.151172][ T637] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 172.151387][ T637] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 172.151546][ T637] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 172.151760][ T637] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 172.151997][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 172.152208][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 172.152426][ T637] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 172.152691][ T637] ? _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) 
[ 172.152921][ T637] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 172.153136][ T637] register_netdevice (net/core/dev.c:11033) 
[ 172.153354][ T637] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 172.153561][ T637] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 172.153785][ T637] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 172.154030][ T637] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 172.154297][ T637] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 172.154460][ T637] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 172.154735][ T637] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 172.155024][ T637] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 172.155294][ T637] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 172.155517][ T637] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 172.155779][ T637] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 172.155999][ T637] ? 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)) 
[ 172.156158][ T637] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 172.156377][ T637] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 172.156592][ T637] __driver_probe_device (drivers/base/dd.c:800) 
[ 172.156808][ T637] driver_probe_device (drivers/base/dd.c:830) 
[ 172.157032][ T637] __device_attach_driver (drivers/base/dd.c:959) 
[ 172.157246][ T637] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 172.157505][ T637] bus_for_each_drv (drivers/base/bus.c:462) 
[ 172.157730][ T637] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 172.157947][ T637] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 172.158161][ T637] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 172.158372][ T637] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 172.158588][ T637] __device_attach (drivers/base/dd.c:1030) 
[ 172.158804][ T637] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 172.159022][ T637] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 172.159233][ T637] ? 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) 
[ 172.159451][ T637] bus_probe_device (drivers/base/bus.c:537) 
[ 172.159664][ T637] device_add (drivers/base/core.c:3672) 
[ 172.159888][ T637] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 172.160100][ T637] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 172.160319][ T637] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 172.160590][ T637] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 172.160873][ T637] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 172.161082][ T637] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 172.161299][ T637] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 172.161509][ T637] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 172.161725][ T637] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 172.161905][ T637] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 172.162121][ T637] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 172.162328][ T637] ? 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) 
[ 172.162545][ T637] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 172.162763][ T637] ksys_write (fs/read_write.c:731) 
[ 172.162934][ T637] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 172.163145][ T637] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 172.163366][ T637] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 172.163579][ T637] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  172.163842][  T637] RIP: 0033:0x7fe87986ab77
[ 172.164061][ T637] 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
[  172.164784][  T637] RSP: 002b:00007ffef52fc488 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  172.165110][  T637] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe87986ab77
[  172.165421][  T637] RDX: 0000000000000002 RSI: 000056234c686760 RDI: 0000000000000001
[  172.165734][  T637] RBP: 000056234c686760 R08: 0000000000000000 R09: 00007fe8798dd4e0
[  172.166064][  T637] R10: 00007fe8798dd3e0 R11: 0000000000000246 R12: 0000000000000002
[  172.166374][  T637] R13: 00007fe879926760 R14: 0000000000000002 R15: 00007fe8799219c0
| [  178.931630][  T637] ------------[ cut here ]------------
| [ 178.932069][ T637] WARNING: CPU: 3 PID: 637 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:10596) 
| [  178.932629][  T637] Modules linked in: netdevsim psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb [last unloaded: netdevsim]
| [  178.933646][  T637] Tainted: [W]=WARN
[  178.933860][  T637] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 178.934136][ T637] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.934411][ T637] Code: 00 e8 13 47 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 5f 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:	13 47 fe             	adc    -0x2(%rdi),%eax
   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 5f 99 00       	call   0x995fb9
  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
[  178.935169][  T637] RSP: 0018:ffffc90001737528 EFLAGS: 00010246
[  178.935449][  T637] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  178.935772][  T637] RDX: 0000000000000000 RSI: ffff8880057eacd0 RDI: ffff88800bf2d0f8
[  178.936104][  T637] RBP: ffffffff8cc53580 R08: 0000000000000000 R09: fffffbfff1542504
[  178.936455][  T637] R10: ffffffff8aa12827 R11: ffff88800bf2c5c0 R12: 0000000000000000
[  178.936778][  T637] R13: ffff8880057ea130 R14: ffff8880057ea008 R15: ffff8880057ea000
[  178.937116][  T637] FS:  00007fe879729740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  178.937483][  T637] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  178.937760][  T637] CR2: 000056234c686760 CR3: 000000000ca86004 CR4: 0000000000772ef0
[  178.938088][  T637] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  178.938410][  T637] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  178.938728][  T637] PKRU: 55555554
[  178.938903][  T637] Call Trace:
[  178.939069][  T637]  <TASK>
[ 178.939182][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.939405][ T637] ? __warn (kernel/panic.c:748) 
[ 178.939576][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.939797][ T637] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 178.940036][ T637] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 178.940205][ T637] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 178.940424][ T637] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 178.940659][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.940901][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 178.941125][ T637] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 178.941401][ T637] ? _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) 
[ 178.941627][ T637] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 178.941860][ T637] register_netdevice (net/core/dev.c:11033) 
[ 178.942084][ T637] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 178.942302][ T637] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 178.942528][ T637] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 178.942759][ T637] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 178.943050][ T637] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 178.943222][ T637] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 178.943508][ T637] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 178.943787][ T637] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 178.944092][ T637] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 178.944327][ T637] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 178.944605][ T637] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 178.944859][ T637] ? 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)) 
[ 178.945028][ T637] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 178.945258][ T637] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 178.945491][ T637] __driver_probe_device (drivers/base/dd.c:800) 
[ 178.945715][ T637] driver_probe_device (drivers/base/dd.c:830) 
[ 178.945953][ T637] __device_attach_driver (drivers/base/dd.c:959) 
[ 178.946177][ T637] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 178.946446][ T637] bus_for_each_drv (drivers/base/bus.c:462) 
[ 178.946667][ T637] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 178.946895][ T637] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 178.947119][ T637] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 178.947337][ T637] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 178.947562][ T637] __device_attach (drivers/base/dd.c:1030) 
[ 178.947784][ T637] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 178.948014][ T637] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 178.948233][ T637] ? 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) 
[ 178.948459][ T637] bus_probe_device (drivers/base/bus.c:537) 
[ 178.948690][ T637] device_add (drivers/base/core.c:3672) 
[ 178.948924][ T637] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 178.949143][ T637] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 178.949375][ T637] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 178.949661][ T637] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 178.949956][ T637] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 178.950174][ T637] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 178.950404][ T637] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 178.950636][ T637] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 178.950875][ T637] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 178.951057][ T637] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 178.951283][ T637] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 178.951501][ T637] ? 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) 
[ 178.951729][ T637] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 178.951971][ T637] ksys_write (fs/read_write.c:731) 
[ 178.952145][ T637] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 178.952361][ T637] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 178.952591][ T637] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 178.952824][ T637] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  178.953108][  T637] RIP: 0033:0x7fe87986ab77
[ 178.953333][ T637] 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
[  178.954100][  T637] RSP: 002b:00007ffef52fd068 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  178.954443][  T637] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fe87986ab77
[  178.954766][  T637] RDX: 0000000000000005 RSI: 000056234c686760 RDI: 0000000000000001
[  178.955100][  T637] RBP: 000056234c686760 R08: 0000000000000000 R09: 00007fe8798dd4e0
[  178.955414][  T637] R10: 00007fe8798dd3e0 R11: 0000000000000246 R12: 0000000000000005
[  178.955721][  T637] R13: 00007fe879926760 R14: 0000000000000005 R15: 00007fe8799219c0
| [  178.975107][  T637] ------------[ cut here ]------------
| [ 178.975421][ T637] WARNING: CPU: 0 PID: 637 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:10596) 
| [  178.976105][  T637] Modules linked in: netdevsim psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb [last unloaded: netdevsim]
| [  178.977169][  T637] Tainted: [W]=WARN
[  178.977339][  T637] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 178.977617][ T637] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.977902][ T637] Code: 00 e8 13 47 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 5f 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:	13 47 fe             	adc    -0x2(%rdi),%eax
   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 5f 99 00       	call   0x995fb9
  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
[  178.978657][  T637] RSP: 0018:ffffc90001737528 EFLAGS: 00010246
[  178.978950][  T637] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  178.979272][  T637] RDX: 0000000000000000 RSI: ffff88801259acd0 RDI: ffff88800bf2d0f8
[  178.979580][  T637] RBP: ffffffff8cc53580 R08: 0000000000000000 R09: fffffbfff1542504
[  178.979902][  T637] R10: ffffffff8aa12827 R11: ffff88800bf2c5c0 R12: 0000000000000000
[  178.980216][  T637] R13: ffff88801259a130 R14: ffff88801259a008 R15: ffff88801259a000
[  178.980538][  T637] FS:  00007fe879729740(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[  178.980910][  T637] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  178.981173][  T637] CR2: 00007fe8798cac8c CR3: 000000000ca86001 CR4: 0000000000772ef0
[  178.981482][  T637] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  178.981795][  T637] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  178.982116][  T637] PKRU: 55555554
[  178.982278][  T637] Call Trace:
[  178.982436][  T637]  <TASK>
[ 178.982546][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.982756][ T637] ? __warn (kernel/panic.c:748) 
[ 178.982931][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.983147][ T637] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 178.983370][ T637] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 178.983534][ T637] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 178.983746][ T637] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 178.983980][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10596) 
[ 178.984195][ T637] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10596) 
[ 178.984412][ T637] ? __pfx___netdev_update_features (net/core/dev.c:10589) 
[ 178.984680][ T637] ? _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) 
[ 178.984923][ T637] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 178.985140][ T637] register_netdevice (net/core/dev.c:11033) 
[ 178.985356][ T637] ? __pfx_register_netdevice (net/core/dev.c:10911) 
[ 178.985565][ T637] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 178.985792][ T637] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 178.986026][ T637] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 178.986302][ T637] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 178.986480][ T637] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 178.986756][ T637] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 178.987036][ T637] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 178.987315][ T637] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 178.987538][ T637] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 178.987807][ T637] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 178.988031][ T637] ? 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)) 
[ 178.988193][ T637] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 178.988414][ T637] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 178.988640][ T637] __driver_probe_device (drivers/base/dd.c:800) 
[ 178.988866][ T637] driver_probe_device (drivers/base/dd.c:830) 
[ 178.989079][ T637] __device_attach_driver (drivers/base/dd.c:959) 
[ 178.989297][ T637] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 178.989555][ T637] bus_for_each_drv (drivers/base/bus.c:462) 
[ 178.989770][ T637] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 178.989995][ T637] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 178.990206][ T637] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 178.990416][ T637] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 178.990633][ T637] __device_attach (drivers/base/dd.c:1030) 
[ 178.990856][ T637] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 178.991073][ T637] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 178.991288][ T637] ? 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) 
[ 178.991507][ T637] bus_probe_device (drivers/base/bus.c:537) 
[ 178.991723][ T637] device_add (drivers/base/core.c:3672) 
[ 178.991947][ T637] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 178.992165][ T637] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 178.992387][ T637] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 178.992666][ T637] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 178.992953][ T637] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 178.993163][ T637] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 178.993386][ T637] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 178.993598][ T637] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 178.993826][ T637] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 178.994000][ T637] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 178.994217][ T637] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 178.994436][ T637] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 178.994658][ T637] ksys_write (fs/read_write.c:731) 
[ 178.994852][ T637] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 178.995076][ T637] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 178.995291][ T637] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  178.995556][  T637] RIP: 0033:0x7fe87986ab77
[ 178.995773][ T637] 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
[  178.996504][  T637] RSP: 002b:00007ffef52fd2c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  178.996827][  T637] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fe87986ab77
[  178.997141][  T637] RDX: 0000000000000005 RSI: 000056234c686760 RDI: 0000000000000001
[  178.997455][  T637] RBP: 000056234c686760 R08: 0000000000000000 R09: 00007fe8798dd4e0
[  178.997772][  T637] R10: 00007fe8798dd3e0 R11: 0000000000000246 R12: 0000000000000005


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