======================================
| 0
| xx__-> [ 4467.235868][T20831] ------------[ cut here ]------------
| [4467.236321][T20831] WARNING: CPU: 3 PID: 20831 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) 
| [ 4467.236752][T20831] Modules linked in: netdevsim psample vxlan act_mirred cls_matchall ip6_gre gre sch_ingress nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6t_REJECT ipt_REJECT nft_compat nf_tables
[ 4467.237984][T20831] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[4467.238273][T20831] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4467.238565][T20831] 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
[ 4467.239315][T20831] RSP: 0018:ffffc90001817528 EFLAGS: 00010246
[ 4467.239586][T20831] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4467.239900][T20831] RDX: 0000000000000000 RSI: ffff8880108facd0 RDI: ffff88800ad98b78
[ 4467.240256][T20831] RBP: ffffffffa5653580 R08: 0000000000000000 R09: fffffbfff4682504
[ 4467.240575][T20831] R10: ffffffffa3412827 R11: ffff88800ad98040 R12: 0000000000000000
[ 4467.240888][T20831] R13: ffff8880108fa130 R14: ffff8880108fa008 R15: ffff8880108fa000
[ 4467.241219][T20831] FS:  00007fdbc19fe740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[ 4467.241582][T20831] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4467.241848][T20831] CR2: 000055b5d2c5ff88 CR3: 000000000d22c004 CR4: 0000000000772ef0
[ 4467.242181][T20831] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4467.242493][T20831] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4467.242806][T20831] PKRU: 55555554
[ 4467.243294][T20831] Call Trace:
[ 4467.243461][T20831]  <TASK>
[4467.243577][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[4467.243798][T20831] ? __warn (kernel/panic.c:748) 
[4467.243960][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[4467.244183][T20831] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[4467.244398][T20831] ? handle_bug (arch/x86/kernel/traps.c:285) 
[4467.244560][T20831] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[4467.244767][T20831] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[4467.244990][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[4467.245217][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[4467.245433][T20831] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[4467.245698][T20831] ? _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) 
[4467.245913][T20831] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[4467.246141][T20831] register_netdevice (net/core/dev.c:11003) 
[4467.246362][T20831] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[4467.246573][T20831] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[4467.246802][T20831] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[4467.247039][T20831] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[4467.247310][T20831] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[4467.247476][T20831] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[4467.247751][T20831] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[4467.248045][T20831] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[4467.248322][T20831] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[4467.248543][T20831] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[4467.248808][T20831] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[4467.249033][T20831] ? 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)) 
[4467.249198][T20831] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[4467.249418][T20831] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[4467.249633][T20831] __driver_probe_device (drivers/base/dd.c:800) 
[4467.249849][T20831] driver_probe_device (drivers/base/dd.c:830) 
[4467.250076][T20831] __device_attach_driver (drivers/base/dd.c:959) 
[4467.250289][T20831] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[4467.250545][T20831] bus_for_each_drv (drivers/base/bus.c:462) 
[4467.250760][T20831] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[4467.250966][T20831] ? bus_to_subsys (drivers/base/bus.c:85) 
[4467.251185][T20831] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4467.251399][T20831] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[4467.251616][T20831] __device_attach (drivers/base/dd.c:1030) 
[4467.251826][T20831] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[4467.252045][T20831] ? bus_to_subsys (drivers/base/bus.c:85) 
[4467.252257][T20831] ? 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) 
[4467.252473][T20831] bus_probe_device (drivers/base/bus.c:537) 
[4467.252686][T20831] device_add (drivers/base/core.c:3672) 
[4467.252904][T20831] ? __pfx_device_add (drivers/base/core.c:3548) 
[4467.253132][T20831] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[4467.253354][T20831] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[4467.253626][T20831] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[4467.253900][T20831] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4467.254121][T20831] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[4467.254336][T20831] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4467.254547][T20831] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[4467.254770][T20831] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[4467.254936][T20831] ? __pfx_vfs_write (fs/read_write.c:660) 
[4467.255162][T20831] ? __lock_release (kernel/locking/lockdep.c:5527) 
[4467.255375][T20831] ? 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) 
[4467.255592][T20831] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[4467.255808][T20831] ksys_write (fs/read_write.c:731) 
[4467.255975][T20831] ? __pfx_ksys_write (fs/read_write.c:721) 
[4467.256196][T20831] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[4467.256418][T20831] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4467.256629][T20831] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4467.256885][T20831] RIP: 0033:0x7fdbc1b3fb77
[ 4467.257118][T20831] 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
[ 4467.257849][T20831] RSP: 002b:00007ffc398cc408 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4467.258195][T20831] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fdbc1b3fb77
[ 4467.258511][T20831] RDX: 0000000000000004 RSI: 000055b5d2c5ef80 RDI: 0000000000000001
[ 4467.258831][T20831] RBP: 000055b5d2c5ef80 R08: 0000000000000003 R09: 0000000000000000
[ 4467.259159][T20831] R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000004
[ 4467.259483][T20831] R13: 00007fdbc1bfb760 R14: 0000000000000004 R15: 00007fdbc1bf69c0
| [ 4467.277909][T20831] ------------[ cut here ]------------
| [4467.278291][T20831] WARNING: CPU: 2 PID: 20831 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) 
| [ 4467.278749][T20831] Modules linked in: netdevsim psample vxlan act_mirred cls_matchall ip6_gre gre sch_ingress nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6t_REJECT ipt_REJECT nft_compat nf_tables
| [ 4467.280166][T20831] Tainted: [W]=WARN
[ 4467.280370][T20831] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[4467.280669][T20831] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4467.280968][T20831] 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
[ 4467.281899][T20831] RSP: 0018:ffffc90001817528 EFLAGS: 00010246
[ 4467.282223][T20831] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4467.282561][T20831] RDX: 0000000000000000 RSI: ffff88800ad8acd0 RDI: ffff88800ad98b78
[ 4467.282906][T20831] RBP: ffffffffa5653580 R08: 0000000000000000 R09: fffffbfff4682504
[ 4467.283389][T20831] R10: ffffffffa3412827 R11: ffff88800ad98040 R12: 0000000000000000
[ 4467.283760][T20831] R13: ffff88800ad8a130 R14: ffff88800ad8a008 R15: ffff88800ad8a000
[ 4467.284124][T20831] FS:  00007fdbc19fe740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 4467.284520][T20831] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4467.284813][T20831] CR2: 00007fac34feb6f0 CR3: 000000000d22c006 CR4: 0000000000772ef0
[ 4467.285182][T20831] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4467.285521][T20831] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4467.285851][T20831] PKRU: 55555554
[ 4467.286038][T20831] Call Trace:
[ 4467.286219][T20831]  <TASK>
[4467.286362][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[4467.286600][T20831] ? __warn (kernel/panic.c:748) 
[4467.286788][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[4467.287047][T20831] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[4467.287287][T20831] ? handle_bug (arch/x86/kernel/traps.c:285) 
[4467.287485][T20831] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[4467.287714][T20831] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[4467.287991][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[4467.288242][T20831] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[4467.288483][T20831] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[4467.288791][T20831] ? _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) 
[4467.289052][T20831] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[4467.289307][T20831] register_netdevice (net/core/dev.c:11003) 
[4467.289547][T20831] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[4467.289777][T20831] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[4467.290028][T20831] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[4467.290280][T20831] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[4467.290595][T20831] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[4467.290784][T20831] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[4467.291100][T20831] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[4467.291402][T20831] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[4467.291718][T20831] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[4467.291993][T20831] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[4467.292316][T20831] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[4467.292565][T20831] ? 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)) 
[4467.292751][T20831] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[4467.293000][T20831] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[4467.293268][T20831] __driver_probe_device (drivers/base/dd.c:800) 
[4467.293510][T20831] driver_probe_device (drivers/base/dd.c:830) 
[4467.293756][T20831] __device_attach_driver (drivers/base/dd.c:959) 
[4467.294002][T20831] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[4467.294309][T20831] bus_for_each_drv (drivers/base/bus.c:462) 
[4467.294549][T20831] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[4467.294782][T20831] ? bus_to_subsys (drivers/base/bus.c:85) 
[4467.295038][T20831] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4467.295275][T20831] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[4467.295518][T20831] __device_attach (drivers/base/dd.c:1030) 
[4467.295758][T20831] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[4467.295991][T20831] ? bus_to_subsys (drivers/base/bus.c:85) 
[4467.296238][T20831] ? 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) 
[4467.296484][T20831] bus_probe_device (drivers/base/bus.c:537) 
[4467.296723][T20831] device_add (drivers/base/core.c:3672) 
[4467.296958][T20831] ? __pfx_device_add (drivers/base/core.c:3548) 
[4467.297201][T20831] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[4467.297454][T20831] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[4467.297755][T20831] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[4467.298098][T20831] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4467.298339][T20831] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[4467.298584][T20831] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[4467.298821][T20831] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[4467.299074][T20831] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[4467.299276][T20831] ? __pfx_vfs_write (fs/read_write.c:660) 
[4467.299518][T20831] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[4467.299763][T20831] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4467.300018][T20831] ksys_write (fs/read_write.c:731) 
[4467.300206][T20831] ? __pfx_ksys_write (fs/read_write.c:721) 
[4467.300455][T20831] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4467.300998][T20831] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4467.301434][T20831] RIP: 0033:0x7fdbc1b3fb77
[ 4467.301667][T20831] 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
[ 4467.302435][T20831] RSP: 002b:00007ffc398cc408 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4467.302776][T20831] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fdbc1b3fb77
[ 4467.303129][T20831] RDX: 0000000000000004 RSI: 000055b5d2c5ef80 RDI: 0000000000000001
[ 4467.303473][T20831] RBP: 000055b5d2c5ef80 R08: 0000000000000000 R09: 00007fdbc1bb24e0
[ 4467.303967][T20831] R10: 00007fdbc1bb23e0 R11: 0000000000000246 R12: 0000000000000004


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