======================================
| 0
| xx__-> [ 1560.994533][T16312] ------------[ cut here ]------------
| [1560.994925][T16312] WARNING: CPU: 1 PID: 16312 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) 
| [ 1560.995380][T16312] Modules linked in: netdevsim xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core pktgen xt_conntrack nft_chain_nat xt_nat nft_compat nf_tables act_gact cls_flower sch_ingress unix_diag vxlan poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh
[ 1560.997153][T16312] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[1560.997433][T16312] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 1560.997725][T16312] 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
[ 1560.998563][T16312] RSP: 0018:ffffc900009e7528 EFLAGS: 00010246
[ 1560.998940][T16312] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 1560.999376][T16312] RDX: 0000000000000000 RSI: ffff888013f12cd0 RDI: ffff88805b2b50f8
[ 1560.999860][T16312] RBP: ffffffffa2e53580 R08: 0000000000000000 R09: fffffbfff4182504
[ 1561.000283][T16312] R10: ffffffffa0c12827 R11: ffff88805b2b45c0 R12: 0000000000000000
[ 1561.000617][T16312] R13: ffff888013f12130 R14: ffff888013f12008 R15: ffff888013f12000
[ 1561.000962][T16312] FS:  00007f9f3ef001c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[ 1561.001353][T16312] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1561.001635][T16312] CR2: 00007f9f31031c70 CR3: 000000000b46c006 CR4: 0000000000772ef0
[ 1561.001974][T16312] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1561.002308][T16312] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1561.002643][T16312] PKRU: 55555554
[ 1561.002813][T16312] Call Trace:
[ 1561.002995][T16312]  <TASK>
[1561.003116][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1561.003349][T16312] ? __warn (kernel/panic.c:748) 
[1561.003540][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1561.003839][T16312] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[1561.004238][T16312] ? handle_bug (arch/x86/kernel/traps.c:285) 
[1561.004417][T16312] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[1561.004639][T16312] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[1561.004877][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1561.005236][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[1561.005535][T16312] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[1561.005993][T16312] ? _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) 
[1561.006254][T16312] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[1561.006490][T16312] register_netdevice (net/core/dev.c:11003) 
[1561.006730][T16312] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[1561.007065][T16312] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[1561.007372][T16312] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[1561.007654][T16312] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[1561.007989][T16312] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[1561.008172][T16312] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[1561.008534][T16312] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[1561.008917][T16312] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[1561.009291][T16312] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[1561.009596][T16312] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[1561.009906][T16312] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[1561.010140][T16312] ? 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)) 
[1561.010313][T16312] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[1561.010548][T16312] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[1561.010782][T16312] __driver_probe_device (drivers/base/dd.c:800) 
[1561.011023][T16312] driver_probe_device (drivers/base/dd.c:830) 
[1561.011251][T16312] __device_attach_driver (drivers/base/dd.c:959) 
[1561.011481][T16312] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[1561.011762][T16312] bus_for_each_drv (drivers/base/bus.c:462) 
[1561.012058][T16312] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[1561.012351][T16312] ? bus_to_subsys (drivers/base/bus.c:85) 
[1561.012596][T16312] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[1561.012819][T16312] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[1561.013057][T16312] __device_attach (drivers/base/dd.c:1030) 
[1561.013331][T16312] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[1561.013641][T16312] ? bus_to_subsys (drivers/base/bus.c:85) 
[1561.013939][T16312] ? 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) 
[1561.014234][T16312] bus_probe_device (drivers/base/bus.c:537) 
[1561.014499][T16312] device_add (drivers/base/core.c:3672) 
[1561.014725][T16312] ? __pfx_device_add (drivers/base/core.c:3548) 
[1561.014962][T16312] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[1561.015240][T16312] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[1561.015578][T16312] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[1561.015943][T16312] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1561.016166][T16312] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[1561.016396][T16312] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1561.016668][T16312] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[1561.016965][T16312] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[1561.017146][T16312] ? __pfx_vfs_write (fs/read_write.c:660) 
[1561.017398][T16312] ? __lock_release (kernel/locking/lockdep.c:5527) 
[1561.017686][T16312] ? 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) 
[1561.017992][T16312] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[1561.018226][T16312] ksys_write (fs/read_write.c:731) 
[1561.018402][T16312] ? __pfx_ksys_write (fs/read_write.c:721) 
[1561.018642][T16312] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[1561.018949][T16312] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[1561.019216][T16312] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1561.019497][T16312] RIP: 0033:0x7f9f3f11ab77
[ 1561.019735][T16312] 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
[ 1561.020715][T16312] RSP: 002b:00007ffde50d0c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1561.021073][T16312] RAX: ffffffffffffffda RBX: 00007f9f3ef00140 RCX: 00007f9f3f11ab77
[ 1561.021412][T16312] RDX: 0000000000000007 RSI: 0000565543728fd0 RDI: 0000000000000006
[ 1561.021748][T16312] RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000
[ 1561.022091][T16312] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f9f30fb7340
[ 1561.022512][T16312] R13: 0000565543728fd0 R14: 0000000000000006 R15: 0000565543500900
| [ 1564.212819][T16312] ------------[ cut here ]------------
| [1564.213269][T16312] WARNING: CPU: 0 PID: 16312 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) 
| [ 1564.213720][T16312] Modules linked in: netdevsim xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core pktgen xt_conntrack nft_chain_nat xt_nat nft_compat nf_tables act_gact cls_flower sch_ingress unix_diag vxlan poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh
| [ 1564.216259][T16312] Tainted: [W]=WARN
[ 1564.216444][T16312] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[1564.216708][T16312] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 1564.216985][T16312] 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
[ 1564.217690][T16312] RSP: 0018:ffffc900009e7528 EFLAGS: 00010246
[ 1564.217965][T16312] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 1564.218286][T16312] RDX: 0000000000000000 RSI: ffff888059a42cd0 RDI: ffff88805b2b50f8
[ 1564.218619][T16312] RBP: ffffffffa2e53580 R08: 0000000000000000 R09: fffffbfff4182504
[ 1564.218943][T16312] R10: ffffffffa0c12827 R11: ffff88805b2b45c0 R12: 0000000000000000
[ 1564.219252][T16312] R13: ffff888059a42130 R14: ffff888059a42008 R15: ffff888059a42000
[ 1564.219564][T16312] FS:  00007f9f3ef001c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[ 1564.219966][T16312] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1564.220243][T16312] CR2: 00007fb27e840a00 CR3: 000000000b46c006 CR4: 0000000000772ef0
[ 1564.220555][T16312] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1564.220868][T16312] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1564.221196][T16312] PKRU: 55555554
[ 1564.221358][T16312] Call Trace:
[ 1564.221520][T16312]  <TASK>
[1564.221635][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1564.221847][T16312] ? __warn (kernel/panic.c:748) 
[1564.222021][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1564.222234][T16312] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[1564.222450][T16312] ? handle_bug (arch/x86/kernel/traps.c:285) 
[1564.222612][T16312] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[1564.222823][T16312] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[1564.223063][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1564.223280][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[1564.223522][T16312] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[1564.223791][T16312] ? _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) 
[1564.224019][T16312] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[1564.224238][T16312] register_netdevice (net/core/dev.c:11003) 
[1564.224457][T16312] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[1564.224664][T16312] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[1564.224906][T16312] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[1564.225142][T16312] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[1564.225424][T16312] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[1564.225592][T16312] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[1564.225867][T16312] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[1564.226151][T16312] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[1564.226425][T16312] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[1564.226682][T16312] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[1564.226959][T16312] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[1564.227176][T16312] ? 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)) 
[1564.227337][T16312] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[1564.227558][T16312] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[1564.227777][T16312] __driver_probe_device (drivers/base/dd.c:800) 
[1564.228003][T16312] driver_probe_device (drivers/base/dd.c:830) 
[1564.228220][T16312] __device_attach_driver (drivers/base/dd.c:959) 
[1564.228435][T16312] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[1564.228694][T16312] bus_for_each_drv (drivers/base/bus.c:462) 
[1564.228918][T16312] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[1564.229130][T16312] ? bus_to_subsys (drivers/base/bus.c:85) 
[1564.229341][T16312] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[1564.229552][T16312] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[1564.229773][T16312] __device_attach (drivers/base/dd.c:1030) 
[1564.229996][T16312] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[1564.230207][T16312] ? bus_to_subsys (drivers/base/bus.c:85) 
[1564.230418][T16312] ? 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) 
[1564.230637][T16312] bus_probe_device (drivers/base/bus.c:537) 
[1564.230851][T16312] device_add (drivers/base/core.c:3672) 
[1564.231073][T16312] ? __pfx_device_add (drivers/base/core.c:3548) 
[1564.231283][T16312] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[1564.231512][T16312] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[1564.231785][T16312] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[1564.232069][T16312] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1564.232277][T16312] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[1564.232498][T16312] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1564.232705][T16312] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[1564.232939][T16312] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[1564.233108][T16312] ? __pfx_vfs_write (fs/read_write.c:660) 
[1564.233321][T16312] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[1564.233554][T16312] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[1564.233825][T16312] ksys_write (fs/read_write.c:731) 
[1564.234002][T16312] ? __pfx_ksys_write (fs/read_write.c:721) 
[1564.234213][T16312] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[1564.234434][T16312] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[1564.234653][T16312] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1564.234929][T16312] RIP: 0033:0x7f9f3f11ab77
[ 1564.235147][T16312] 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
[ 1564.235863][T16312] RSP: 002b:00007ffde50d0d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1564.236188][T16312] RAX: ffffffffffffffda RBX: 00007f9f3ef00140 RCX: 00007f9f3f11ab77
[ 1564.236491][T16312] RDX: 000000000000000b RSI: 000056554372cee0 RDI: 0000000000000006
[ 1564.236792][T16312] RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
[ 1564.237106][T16312] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f9f30e42280
[ 1564.237411][T16312] R13: 000056554372cee0 R14: 0000000000000006 R15: 0000565543500900
| [ 1568.166337][T16312] ------------[ cut here ]------------
| [1568.166864][T16312] WARNING: CPU: 1 PID: 16312 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) 
| [ 1568.167995][T16312] Modules linked in: netdevsim xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core pktgen xt_conntrack nft_chain_nat xt_nat nft_compat nf_tables act_gact cls_flower sch_ingress unix_diag vxlan poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh
| [ 1568.169849][T16312] Tainted: [W]=WARN
[ 1568.170027][T16312] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[1568.170334][T16312] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 1568.170636][T16312] 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
[ 1568.171410][T16312] RSP: 0018:ffffc900009e7528 EFLAGS: 00010246
[ 1568.171695][T16312] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 1568.172095][T16312] RDX: 0000000000000000 RSI: ffff888059c32cd0 RDI: ffff88805b2b50f8
[ 1568.172423][T16312] RBP: ffffffffa2e53580 R08: 0000000000000000 R09: fffffbfff4182504
[ 1568.172803][T16312] R10: ffffffffa0c12827 R11: ffff88805b2b45c0 R12: 0000000000000000
[ 1568.173244][T16312] R13: ffff888059c32130 R14: ffff888059c32008 R15: ffff888059c32000
[ 1568.173641][T16312] FS:  00007f9f3ef001c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[ 1568.174030][T16312] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1568.174361][T16312] CR2: 00007fb27e6505a0 CR3: 000000000b46c003 CR4: 0000000000772ef0
[ 1568.174712][T16312] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1568.175051][T16312] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1568.175384][T16312] PKRU: 55555554
[ 1568.175588][T16312] Call Trace:
[ 1568.175805][T16312]  <TASK>
[1568.175964][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1568.176253][T16312] ? __warn (kernel/panic.c:748) 
[1568.176440][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1568.176667][T16312] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[1568.176959][T16312] ? handle_bug (arch/x86/kernel/traps.c:285) 
[1568.177146][T16312] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[1568.177372][T16312] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[1568.177611][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1568.177841][T16312] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[1568.178147][T16312] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[1568.178507][T16312] ? _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) 
[1568.178737][T16312] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[1568.178978][T16312] register_netdevice (net/core/dev.c:11003) 
[1568.179207][T16312] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[1568.179430][T16312] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[1568.179741][T16312] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[1568.180055][T16312] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[1568.180418][T16312] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[1568.180591][T16312] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[1568.180881][T16312] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[1568.181228][T16312] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[1568.181601][T16312] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[1568.181912][T16312] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[1568.182274][T16312] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[1568.182541][T16312] ? 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)) 
[1568.182707][T16312] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[1568.182947][T16312] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[1568.183181][T16312] __driver_probe_device (drivers/base/dd.c:800) 
[1568.183414][T16312] driver_probe_device (drivers/base/dd.c:830) 
[1568.183636][T16312] __device_attach_driver (drivers/base/dd.c:959) 
[1568.183861][T16312] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[1568.184142][T16312] bus_for_each_drv (drivers/base/bus.c:462) 
[1568.184367][T16312] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[1568.184587][T16312] ? bus_to_subsys (drivers/base/bus.c:85) 
[1568.184809][T16312] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[1568.185043][T16312] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[1568.185270][T16312] __device_attach (drivers/base/dd.c:1030) 
[1568.185491][T16312] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[1568.185715][T16312] ? bus_to_subsys (drivers/base/bus.c:85) 
[1568.185948][T16312] ? 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) 
[1568.186177][T16312] bus_probe_device (drivers/base/bus.c:537) 
[1568.186404][T16312] device_add (drivers/base/core.c:3672) 
[1568.186632][T16312] ? __pfx_device_add (drivers/base/core.c:3548) 
[1568.186858][T16312] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[1568.187108][T16312] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[1568.187399][T16312] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[1568.187682][T16312] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1568.187907][T16312] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[1568.188134][T16312] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1568.188355][T16312] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[1568.188588][T16312] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[1568.188765][T16312] ? __pfx_vfs_write (fs/read_write.c:660) 
[1568.188995][T16312] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[1568.189234][T16312] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[1568.189520][T16312] ksys_write (fs/read_write.c:731) 
[1568.189692][T16312] ? __pfx_ksys_write (fs/read_write.c:721) 
[1568.189929][T16312] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[1568.190165][T16312] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[1568.190386][T16312] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1568.190656][T16312] RIP: 0033:0x7f9f3f11ab77
[ 1568.190880][T16312] 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
[ 1568.191650][T16312] RSP: 002b:00007ffde50d0d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1568.191999][T16312] RAX: ffffffffffffffda RBX: 00007f9f3ef00140 RCX: 00007f9f3f11ab77
[ 1568.192396][T16312] RDX: 0000000000000008 RSI: 000056554372cee0 RDI: 0000000000000006
[ 1568.192720][T16312] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[ 1568.193053][T16312] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f9f30e42280


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