======================================
| 0
| xx__-> [ 1216.639966][T13114] ------------[ cut here ]------------
| [1216.640415][T13114] WARNING: CPU: 1 PID: 13114 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) 
| [ 1216.640895][T13114] Modules linked in: netdevsim psample xt_conntrack xt_length act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sctp_diag sctp vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_gact cls_flower vxlan xt_mark nft_compat nf_tables sch_ingress act_mirred cls_basic sch_fq_codel
[ 1216.642536][T13114] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[1216.642803][T13114] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 1216.643092][T13114] 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
[ 1216.643824][T13114] RSP: 0018:ffffc90002e17528 EFLAGS: 00010246
[ 1216.644103][T13114] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 1216.644416][T13114] RDX: 0000000000000000 RSI: ffff888015bcacd0 RDI: ffff888005f950f8
[ 1216.644730][T13114] RBP: ffffffffbb253580 R08: 0000000000000000 R09: fffffbfff7202504
[ 1216.645059][T13114] R10: ffffffffb9012827 R11: ffff888005f945c0 R12: 0000000000000000
[ 1216.645370][T13114] R13: ffff888015bca130 R14: ffff888015bca008 R15: ffff888015bca000
[ 1216.645682][T13114] FS:  00007fc7475491c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[ 1216.646085][T13114] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1216.646356][T13114] CR2: 00007fc739f167c0 CR3: 0000000005f00002 CR4: 0000000000772ef0
[ 1216.646673][T13114] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1216.646996][T13114] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1216.647307][T13114] PKRU: 55555554
[ 1216.647471][T13114] Call Trace:
[ 1216.647633][T13114]  <TASK>
[1216.647747][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1216.647974][T13114] ? __warn (kernel/panic.c:748) 
[1216.648141][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1216.648351][T13114] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[1216.648565][T13114] ? handle_bug (arch/x86/kernel/traps.c:285) 
[1216.648728][T13114] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[1216.648948][T13114] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[1216.649174][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1216.649390][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[1216.649604][T13114] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[1216.649882][T13114] ? _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) 
[1216.650098][T13114] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[1216.650313][T13114] register_netdevice (net/core/dev.c:11003) 
[1216.650530][T13114] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[1216.650740][T13114] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[1216.650996][T13114] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[1216.651220][T13114] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[1216.651483][T13114] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[1216.651645][T13114] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[1216.651929][T13114] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[1216.652194][T13114] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[1216.652464][T13114] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[1216.652686][T13114] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[1216.652959][T13114] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[1216.653169][T13114] ? 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)) 
[1216.653327][T13114] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[1216.653545][T13114] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[1216.653763][T13114] __driver_probe_device (drivers/base/dd.c:800) 
[1216.653984][T13114] driver_probe_device (drivers/base/dd.c:830) 
[1216.654191][T13114] __device_attach_driver (drivers/base/dd.c:959) 
[1216.654402][T13114] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[1216.654657][T13114] bus_for_each_drv (drivers/base/bus.c:462) 
[1216.654877][T13114] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[1216.655084][T13114] ? bus_to_subsys (drivers/base/bus.c:85) 
[1216.655298][T13114] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[1216.655504][T13114] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[1216.655718][T13114] __device_attach (drivers/base/dd.c:1030) 
[1216.655936][T13114] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[1216.656142][T13114] ? bus_to_subsys (drivers/base/bus.c:85) 
[1216.656349][T13114] ? 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) 
[1216.656563][T13114] bus_probe_device (drivers/base/bus.c:537) 
[1216.656780][T13114] device_add (drivers/base/core.c:3672) 
[1216.657001][T13114] ? __pfx_device_add (drivers/base/core.c:3548) 
[1216.657207][T13114] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[1216.657428][T13114] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[1216.657696][T13114] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[1216.657979][T13114] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1216.658184][T13114] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[1216.658401][T13114] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1216.658606][T13114] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[1216.658820][T13114] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[1216.658996][T13114] ? __pfx_vfs_write (fs/read_write.c:660) 
[1216.659212][T13114] ? __lock_release (kernel/locking/lockdep.c:5527) 
[1216.659414][T13114] ? 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) 
[1216.659629][T13114] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[1216.659845][T13114] ksys_write (fs/read_write.c:731) 
[1216.660021][T13114] ? __pfx_ksys_write (fs/read_write.c:721) 
[1216.660225][T13114] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[1216.660442][T13114] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[1216.660653][T13114] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1216.660924][T13114] RIP: 0033:0x7fc747763b77
[ 1216.661143][T13114] 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
[ 1216.661992][T13114] RSP: 002b:00007ffc4fc8f5c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1216.662307][T13114] RAX: ffffffffffffffda RBX: 00007fc747549140 RCX: 00007fc747763b77
[ 1216.662614][T13114] RDX: 0000000000000008 RSI: 000055aeb784cee0 RDI: 0000000000000006
[ 1216.662938][T13114] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[ 1216.663249][T13114] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fc7394874c0
[ 1216.663558][T13114] R13: 000055aeb784cee0 R14: 0000000000000006 R15: 000055aeb7627900
| [ 1219.831747][T13114] ------------[ cut here ]------------
| [1219.832231][T13114] WARNING: CPU: 2 PID: 13114 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) 
| [ 1219.832671][T13114] Modules linked in: netdevsim psample xt_conntrack xt_length act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sctp_diag sctp vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_gact cls_flower vxlan xt_mark nft_compat nf_tables sch_ingress act_mirred cls_basic sch_fq_codel
| [ 1219.834289][T13114] Tainted: [W]=WARN
[ 1219.834486][T13114] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[1219.834758][T13114] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 1219.835051][T13114] 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
[ 1219.835791][T13114] RSP: 0018:ffffc90002e17528 EFLAGS: 00010246
[ 1219.836078][T13114] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 1219.836399][T13114] RDX: 0000000000000000 RSI: ffff888014ff2cd0 RDI: ffff888005f950f8
[ 1219.836721][T13114] RBP: ffffffffbb253580 R08: 0000000000000000 R09: fffffbfff7202504
[ 1219.837052][T13114] R10: ffffffffb9012827 R11: ffff888005f945c0 R12: 0000000000000000
[ 1219.837381][T13114] R13: ffff888014ff2130 R14: ffff888014ff2008 R15: ffff888014ff2000
[ 1219.837888][T13114] FS:  00007fc7475491c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 1219.838267][T13114] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1219.838538][T13114] CR2: 00007fc739f87d60 CR3: 0000000005f00003 CR4: 0000000000772ef0
[ 1219.838876][T13114] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1219.839208][T13114] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1219.839529][T13114] PKRU: 55555554
[ 1219.839704][T13114] Call Trace:
[ 1219.839890][T13114]  <TASK>
[1219.840016][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1219.840246][T13114] ? __warn (kernel/panic.c:748) 
[1219.840418][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1219.840640][T13114] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[1219.840891][T13114] ? handle_bug (arch/x86/kernel/traps.c:285) 
[1219.841066][T13114] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[1219.841288][T13114] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[1219.841529][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1219.841762][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[1219.842012][T13114] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[1219.842298][T13114] ? _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) 
[1219.842533][T13114] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[1219.842764][T13114] register_netdevice (net/core/dev.c:11003) 
[1219.843038][T13114] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[1219.843260][T13114] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[1219.843497][T13114] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[1219.843733][T13114] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[1219.844025][T13114] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[1219.844205][T13114] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[1219.844494][T13114] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[1219.844783][T13114] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[1219.845077][T13114] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[1219.845314][T13114] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[1219.845587][T13114] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[1219.845810][T13114] ? 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)) 
[1219.845994][T13114] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[1219.846228][T13114] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[1219.846458][T13114] __driver_probe_device (drivers/base/dd.c:800) 
[1219.846680][T13114] driver_probe_device (drivers/base/dd.c:830) 
[1219.846913][T13114] __device_attach_driver (drivers/base/dd.c:959) 
[1219.847137][T13114] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[1219.847404][T13114] bus_for_each_drv (drivers/base/bus.c:462) 
[1219.847624][T13114] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[1219.847848][T13114] ? bus_to_subsys (drivers/base/bus.c:85) 
[1219.848081][T13114] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[1219.848304][T13114] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[1219.848529][T13114] __device_attach (drivers/base/dd.c:1030) 
[1219.848750][T13114] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[1219.848980][T13114] ? bus_to_subsys (drivers/base/bus.c:85) 
[1219.849204][T13114] ? 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) 
[1219.849439][T13114] bus_probe_device (drivers/base/bus.c:537) 
[1219.849663][T13114] device_add (drivers/base/core.c:3672) 
[1219.849901][T13114] ? __pfx_device_add (drivers/base/core.c:3548) 
[1219.850120][T13114] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[1219.850353][T13114] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[1219.850634][T13114] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[1219.850939][T13114] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1219.851165][T13114] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[1219.851393][T13114] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1219.851609][T13114] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[1219.851836][T13114] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[1219.852027][T13114] ? __pfx_vfs_write (fs/read_write.c:660) 
[1219.852246][T13114] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[1219.852480][T13114] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[1219.852771][T13114] ksys_write (fs/read_write.c:731) 
[1219.852953][T13114] ? __pfx_ksys_write (fs/read_write.c:721) 
[1219.853177][T13114] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[1219.853405][T13114] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[1219.853631][T13114] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1219.853910][T13114] RIP: 0033:0x7fc747763b77
[ 1219.854138][T13114] 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
[ 1219.854873][T13114] RSP: 002b:00007ffc4fc8f668 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1219.855200][T13114] RAX: ffffffffffffffda RBX: 00007fc747549140 RCX: 00007fc747763b77
[ 1219.855520][T13114] RDX: 000000000000000b RSI: 000055aeb7850df0 RDI: 0000000000000006
[ 1219.855850][T13114] RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
[ 1219.856182][T13114] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fc739487700
[ 1219.856506][T13114] R13: 000055aeb7850df0 R14: 0000000000000006 R15: 000055aeb7627900
| [ 1223.757015][T13114] ------------[ cut here ]------------
| [1223.757439][T13114] WARNING: CPU: 0 PID: 13114 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) 
| [ 1223.758012][T13114] Modules linked in: netdevsim psample xt_conntrack xt_length act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sctp_diag sctp vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan act_gact cls_flower vxlan xt_mark nft_compat nf_tables sch_ingress act_mirred cls_basic sch_fq_codel
| [ 1223.759582][T13114] Tainted: [W]=WARN
[ 1223.759740][T13114] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[1223.760042][T13114] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 1223.760312][T13114] 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
[ 1223.761044][T13114] RSP: 0018:ffffc90002e17528 EFLAGS: 00010246
[ 1223.761312][T13114] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 1223.761631][T13114] RDX: 0000000000000000 RSI: ffff88801028acd0 RDI: ffff888005f950f8
[ 1223.761948][T13114] RBP: ffffffffbb253580 R08: 0000000000000000 R09: fffffbfff7202504
[ 1223.762259][T13114] R10: ffffffffb9012827 R11: ffff888005f945c0 R12: 0000000000000000
[ 1223.762574][T13114] R13: ffff88801028a130 R14: ffff88801028a008 R15: ffff88801028a000
[ 1223.762887][T13114] FS:  00007fc7475491c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[ 1223.763265][T13114] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1223.763524][T13114] CR2: 000055aeb7651900 CR3: 0000000005f00001 CR4: 0000000000772ef0
[ 1223.763834][T13114] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1223.764163][T13114] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1223.764471][T13114] PKRU: 55555554
[ 1223.764629][T13114] Call Trace:
[ 1223.764787][T13114]  <TASK>
[1223.764912][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1223.765123][T13114] ? __warn (kernel/panic.c:748) 
[1223.765285][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1223.765497][T13114] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[1223.765710][T13114] ? handle_bug (arch/x86/kernel/traps.c:285) 
[1223.765888][T13114] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[1223.766101][T13114] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[1223.766325][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[1223.766536][T13114] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[1223.766757][T13114] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[1223.767035][T13114] ? _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) 
[1223.767252][T13114] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[1223.767466][T13114] register_netdevice (net/core/dev.c:11003) 
[1223.767683][T13114] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[1223.767900][T13114] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[1223.768123][T13114] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[1223.768355][T13114] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[1223.768620][T13114] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[1223.768787][T13114] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[1223.769079][T13114] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[1223.769360][T13114] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[1223.769630][T13114] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[1223.769869][T13114] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[1223.770135][T13114] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[1223.770345][T13114] ? 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)) 
[1223.770503][T13114] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[1223.770789][T13114] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[1223.771026][T13114] __driver_probe_device (drivers/base/dd.c:800) 
[1223.771237][T13114] driver_probe_device (drivers/base/dd.c:830) 
[1223.771444][T13114] __device_attach_driver (drivers/base/dd.c:959) 
[1223.771654][T13114] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[1223.771916][T13114] bus_for_each_drv (drivers/base/bus.c:462) 
[1223.772126][T13114] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[1223.772339][T13114] ? bus_to_subsys (drivers/base/bus.c:85) 
[1223.772546][T13114] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[1223.772750][T13114] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[1223.772975][T13114] __device_attach (drivers/base/dd.c:1030) 
[1223.773183][T13114] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[1223.773389][T13114] ? bus_to_subsys (drivers/base/bus.c:85) 
[1223.773596][T13114] ? 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) 
[1223.773818][T13114] bus_probe_device (drivers/base/bus.c:537) 
[1223.774037][T13114] device_add (drivers/base/core.c:3672) 
[1223.774248][T13114] ? __pfx_device_add (drivers/base/core.c:3548) 
[1223.774452][T13114] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[1223.774672][T13114] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[1223.774946][T13114] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[1223.775215][T13114] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1223.775425][T13114] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[1223.775637][T13114] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[1223.775840][T13114] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[1223.776067][T13114] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[1223.776236][T13114] ? __pfx_vfs_write (fs/read_write.c:660) 
[1223.776442][T13114] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[1223.776663][T13114] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[1223.776943][T13114] ksys_write (fs/read_write.c:731) 
[1223.777108][T13114] ? __pfx_ksys_write (fs/read_write.c:721) 
[1223.777313][T13114] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[1223.777530][T13114] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[1223.777748][T13114] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1223.778012][T13114] RIP: 0033:0x7fc747763b77
[ 1223.778224][T13114] 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
[ 1223.778940][T13114] RSP: 002b:00007ffc4fc8f668 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1223.779248][T13114] RAX: ffffffffffffffda RBX: 00007fc747549140 RCX: 00007fc747763b77
[ 1223.779552][T13114] RDX: 0000000000000009 RSI: 000055aeb7850df0 RDI: 0000000000000006
[ 1223.779873][T13114] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[ 1223.780179][T13114] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fc739487700


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