======================================
| [  721.896821][T12135] Initializing XFRM netlink socket
| [  724.310380][ T8933] ------------[ cut here ]------------
| [ 724.310820][ T8933] WARNING: CPU: 2 PID: 8933 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) 
| [  724.311278][ T8933] Modules linked in: netdevsim psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls
[  724.312422][ T8933] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 724.312698][ T8933] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 724.313003][ T8933] 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
[  724.313754][ T8933] RSP: 0018:ffffc90005a77528 EFLAGS: 00010246
[  724.314049][ T8933] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  724.314380][ T8933] RDX: 0000000000000000 RSI: ffff88800c4f2cd0 RDI: ffff888011e20b78
[  724.314710][ T8933] RBP: ffffffff93053580 R08: 0000000000000000 R09: fffffbfff21c2504
[  724.315054][ T8933] R10: ffffffff90e12827 R11: ffff888011e20040 R12: 0000000000000000
[  724.315386][ T8933] R13: ffff88800c4f2130 R14: ffff88800c4f2008 R15: ffff88800c4f2000
[  724.315840][ T8933] FS:  00007f04b29f3740(0000) GS:ffff888065900000(0000) knlGS:0000000000000000
[  724.316263][ T8933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  724.316545][ T8933] CR2: 00005630b4e6d760 CR3: 000000000a6d0003 CR4: 0000000000772ef0
[  724.316881][ T8933] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  724.317224][ T8933] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  724.317552][ T8933] PKRU: 55555554
[  724.317729][ T8933] Call Trace:
[  724.317909][ T8933]  <TASK>
[ 724.318043][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 724.318276][ T8933] ? __warn (kernel/panic.c:748) 
[ 724.318455][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 724.318683][ T8933] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 724.318913][ T8933] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 724.319103][ T8933] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 724.319328][ T8933] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 724.319561][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 724.319786][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 724.320019][ T8933] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 724.320302][ T8933] ? _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) 
[ 724.320535][ T8933] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 724.320764][ T8933] register_netdevice (net/core/dev.c:11003) 
[ 724.321005][ T8933] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 724.321226][ T8933] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 724.321462][ T8933] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 724.321698][ T8933] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 724.321985][ T8933] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 724.322163][ T8933] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 724.322456][ T8933] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 724.322736][ T8933] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 724.323029][ T8933] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 724.323263][ T8933] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 724.323542][ T8933] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 724.323766][ T8933] ? 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)) 
[ 724.323942][ T8933] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 724.324187][ T8933] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 724.324421][ T8933] __driver_probe_device (drivers/base/dd.c:800) 
[ 724.324651][ T8933] driver_probe_device (drivers/base/dd.c:830) 
[ 724.324880][ T8933] __device_attach_driver (drivers/base/dd.c:959) 
[ 724.325113][ T8933] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 724.325388][ T8933] bus_for_each_drv (drivers/base/bus.c:462) 
[ 724.325610][ T8933] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 724.325830][ T8933] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 724.326059][ T8933] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 724.326300][ T8933] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 724.326525][ T8933] __device_attach (drivers/base/dd.c:1030) 
[ 724.326749][ T8933] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 724.326966][ T8933] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 724.327199][ T8933] ? 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) 
[ 724.327424][ T8933] bus_probe_device (drivers/base/bus.c:537) 
[ 724.327649][ T8933] device_add (drivers/base/core.c:3672) 
[ 724.327878][ T8933] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 724.328106][ T8933] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 724.328339][ T8933] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 724.328620][ T8933] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 724.328905][ T8933] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 724.329130][ T8933] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 724.329357][ T8933] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 724.329577][ T8933] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 724.329803][ T8933] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 724.329989][ T8933] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 724.330218][ T8933] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 724.330434][ T8933] ? 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) 
[ 724.330664][ T8933] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 724.330890][ T8933] ksys_write (fs/read_write.c:731) 
[ 724.331077][ T8933] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 724.331299][ T8933] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 724.331530][ T8933] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 724.331756][ T8933] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  724.332035][ T8933] RIP: 0033:0x7f04b2b34b77
[ 724.332274][ T8933] 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
[  724.333012][ T8933] RSP: 002b:00007ffd70486a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  724.333339][ T8933] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f04b2b34b77
[  724.333660][ T8933] RDX: 0000000000000002 RSI: 00005630b4e6d760 RDI: 0000000000000001
[  724.333997][ T8933] RBP: 00005630b4e6d760 R08: 0000000000000000 R09: 00007f04b2ba74e0
[  724.334319][ T8933] R10: 00007f04b2ba73e0 R11: 0000000000000246 R12: 0000000000000002
[  724.334643][ T8933] R13: 00007f04b2bf0760 R14: 0000000000000002 R15: 00007f04b2beb9c0
| [  730.955686][ T8933] ------------[ cut here ]------------
| [ 730.956100][ T8933] WARNING: CPU: 1 PID: 8933 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) 
| [  730.956528][ T8933] Modules linked in: netdevsim psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [last unloaded: netdevsim]
| [  730.957874][ T8933] Tainted: [W]=WARN
[  730.958071][ T8933] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 730.958335][ T8933] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 730.958606][ T8933] 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
[  730.959343][ T8933] RSP: 0018:ffffc90005a77528 EFLAGS: 00010246
[  730.959616][ T8933] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  730.959928][ T8933] RDX: 0000000000000000 RSI: ffff88800de3acd0 RDI: ffff888011e20b78
[  730.960248][ T8933] RBP: ffffffff93053580 R08: 0000000000000000 R09: fffffbfff21c2504
[  730.960562][ T8933] R10: ffffffff90e12827 R11: ffff888011e20040 R12: 0000000000000000
[  730.960873][ T8933] R13: ffff88800de3a130 R14: ffff88800de3a008 R15: ffff88800de3a000
[  730.961201][ T8933] FS:  00007f04b29f3740(0000) GS:ffff888065880000(0000) knlGS:0000000000000000
[  730.961564][ T8933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  730.961827][ T8933] CR2: 00007f04b2a8ff00 CR3: 000000000a6d0002 CR4: 0000000000772ef0
[  730.962144][ T8933] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  730.962454][ T8933] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  730.962787][ T8933] PKRU: 55555554
[  730.962945][ T8933] Call Trace:
[  730.963117][ T8933]  <TASK>
[ 730.963226][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 730.963440][ T8933] ? __warn (kernel/panic.c:748) 
[ 730.963603][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 730.963820][ T8933] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 730.964047][ T8933] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 730.964215][ T8933] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 730.964429][ T8933] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 730.964654][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 730.964866][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 730.965093][ T8933] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 730.965361][ T8933] ? _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) 
[ 730.965578][ T8933] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 730.965803][ T8933] register_netdevice (net/core/dev.c:11003) 
[ 730.966030][ T8933] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 730.966248][ T8933] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 730.966473][ T8933] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 730.966698][ T8933] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 730.966969][ T8933] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 730.967150][ T8933] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 730.967429][ T8933] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 730.967698][ T8933] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 730.967984][ T8933] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 730.968209][ T8933] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 730.968475][ T8933] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 730.968695][ T8933] ? 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)) 
[ 730.968856][ T8933] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 730.969086][ T8933] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 730.969305][ T8933] __driver_probe_device (drivers/base/dd.c:800) 
[ 730.969523][ T8933] driver_probe_device (drivers/base/dd.c:830) 
[ 730.969737][ T8933] __device_attach_driver (drivers/base/dd.c:959) 
[ 730.969950][ T8933] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 730.970224][ T8933] bus_for_each_drv (drivers/base/bus.c:462) 
[ 730.970439][ T8933] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 730.970648][ T8933] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 730.970859][ T8933] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 730.971080][ T8933] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 730.971298][ T8933] __device_attach (drivers/base/dd.c:1030) 
[ 730.971508][ T8933] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 730.971723][ T8933] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 730.971952][ T8933] ? 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) 
[ 730.972181][ T8933] bus_probe_device (drivers/base/bus.c:537) 
[ 730.972395][ T8933] device_add (drivers/base/core.c:3672) 
[ 730.972609][ T8933] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 730.972819][ T8933] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 730.973050][ T8933] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 730.973335][ T8933] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 730.973612][ T8933] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 730.973821][ T8933] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 730.974051][ T8933] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 730.974266][ T8933] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 730.974486][ T8933] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 730.974653][ T8933] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 730.974875][ T8933] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 730.975096][ T8933] ? 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) 
[ 730.975315][ T8933] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 730.975531][ T8933] ksys_write (fs/read_write.c:731) 
[ 730.975694][ T8933] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 730.975905][ T8933] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 730.976134][ T8933] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 730.976354][ T8933] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  730.976618][ T8933] RIP: 0033:0x7f04b2b34b77
[ 730.976832][ T8933] 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
[  730.977568][ T8933] RSP: 002b:00007ffd70487618 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  730.977886][ T8933] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f04b2b34b77
[  730.978205][ T8933] RDX: 0000000000000005 RSI: 00005630b4e6d760 RDI: 0000000000000001
[  730.978514][ T8933] RBP: 00005630b4e6d760 R08: 0000000000000000 R09: 00007f04b2ba74e0
[  730.978826][ T8933] R10: 00007f04b2ba73e0 R11: 0000000000000246 R12: 0000000000000005
[  730.979147][ T8933] R13: 00007f04b2bf0760 R14: 0000000000000005 R15: 00007f04b2beb9c0
| [  731.007310][ T8933] ------------[ cut here ]------------
| [ 731.007690][ T8933] WARNING: CPU: 1 PID: 8933 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) 
| [  731.008231][ T8933] Modules linked in: netdevsim psample xfrm_user macsec vxlan ip6_gre ip_gre gre cls_u32 sch_htb poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls [last unloaded: netdevsim]
| [  731.009449][ T8933] Tainted: [W]=WARN
[  731.009613][ T8933] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 731.009895][ T8933] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 731.010177][ T8933] 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
[  731.010888][ T8933] RSP: 0018:ffffc90005a77528 EFLAGS: 00010246
[  731.011256][ T8933] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  731.011564][ T8933] RDX: 0000000000000000 RSI: ffff888004dd2cd0 RDI: ffff888011e20b78
[  731.011871][ T8933] RBP: ffffffff93053580 R08: 0000000000000000 R09: fffffbfff21c2504
[  731.012280][ T8933] R10: ffffffff90e12827 R11: ffff888011e20040 R12: 0000000000000000
[  731.012592][ T8933] R13: ffff888004dd2130 R14: ffff888004dd2008 R15: ffff888004dd2000
[  731.012897][ T8933] FS:  00007f04b29f3740(0000) GS:ffff888065880000(0000) knlGS:0000000000000000
[  731.013307][ T8933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  731.013566][ T8933] CR2: 00005630b4e64bf8 CR3: 000000000a6d0002 CR4: 0000000000772ef0
[  731.013872][ T8933] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  731.014197][ T8933] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  731.014504][ T8933] PKRU: 55555554
[  731.014660][ T8933] Call Trace:
[  731.014818][ T8933]  <TASK>
[ 731.014926][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 731.015141][ T8933] ? __warn (kernel/panic.c:748) 
[ 731.015302][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 731.015520][ T8933] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 731.015734][ T8933] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 731.015894][ T8933] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 731.016115][ T8933] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 731.016355][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 731.016563][ T8933] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 731.016775][ T8933] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 731.017048][ T8933] ? _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) 
[ 731.017265][ T8933] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 731.017477][ T8933] register_netdevice (net/core/dev.c:11003) 
[ 731.017689][ T8933] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 731.017896][ T8933] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 731.018127][ T8933] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 731.018350][ T8933] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 731.018621][ T8933] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 731.018782][ T8933] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 731.019062][ T8933] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 731.019329][ T8933] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 731.019596][ T8933] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 731.019815][ T8933] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 731.020087][ T8933] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 731.020303][ T8933] ? 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)) 
[ 731.020460][ T8933] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 731.020675][ T8933] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 731.020888][ T8933] __driver_probe_device (drivers/base/dd.c:800) 
[ 731.021109][ T8933] driver_probe_device (drivers/base/dd.c:830) 
[ 731.021317][ T8933] __device_attach_driver (drivers/base/dd.c:959) 
[ 731.021528][ T8933] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 731.021789][ T8933] bus_for_each_drv (drivers/base/bus.c:462) 
[ 731.022016][ T8933] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 731.022222][ T8933] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 731.022431][ T8933] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 731.022636][ T8933] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 731.022850][ T8933] __device_attach (drivers/base/dd.c:1030) 
[ 731.023069][ T8933] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 731.023277][ T8933] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 731.023482][ T8933] ? 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) 
[ 731.023701][ T8933] bus_probe_device (drivers/base/bus.c:537) 
[ 731.023911][ T8933] device_add (drivers/base/core.c:3672) 
[ 731.024134][ T8933] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 731.024342][ T8933] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 731.024562][ T8933] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 731.024833][ T8933] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 731.025117][ T8933] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 731.025329][ T8933] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 731.025545][ T8933] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 731.025749][ T8933] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 731.025965][ T8933] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 731.026154][ T8933] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 731.026363][ T8933] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 731.026579][ T8933] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 731.026817][ T8933] ksys_write (fs/read_write.c:731) 
[ 731.026997][ T8933] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 731.027223][ T8933] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 731.027435][ T8933] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  731.027730][ T8933] RIP: 0033:0x7f04b2b34b77
[ 731.027942][ T8933] 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
[  731.028663][ T8933] RSP: 002b:00007ffd70487878 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  731.028984][ T8933] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f04b2b34b77
[  731.029289][ T8933] RDX: 0000000000000005 RSI: 00005630b4e6d760 RDI: 0000000000000001
[  731.029593][ T8933] RBP: 00005630b4e6d760 R08: 0000000000000000 R09: 00007f04b2ba74e0
[  731.029903][ T8933] R10: 00007f04b2ba73e0 R11: 0000000000000246 R12: 0000000000000005


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