======================================
| xx__-> [   33.197196][  T622] ip (622) used greatest stack depth: 23800 bytes left
| [   33.405622][  T624] ------------[ cut here ]------------
| [ 33.405975][ T624] WARNING: CPU: 0 PID: 624 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) 
| [   33.406471][  T624] Modules linked in: netdevsim psample
[   33.407117][  T624] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 33.407382][ T624] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.407652][ T624] 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
[   33.408387][  T624] RSP: 0018:ffffc90000577528 EFLAGS: 00010246
[   33.408658][  T624] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   33.408968][  T624] RDX: 0000000000000000 RSI: ffff888004ebacd0 RDI: ffff88800988d0f8
[   33.409293][  T624] RBP: ffff88800c971c80 R08: 0000000000000000 R09: fffffbfff7542504
[   33.409608][  T624] R10: ffffffffbaa12827 R11: ffff88800988c5c0 R12: 0000000000000000
[   33.409918][  T624] R13: ffff888004eba130 R14: ffff888004eba008 R15: ffff888004eba000
[   33.410239][  T624] FS:  00007fc87f929740(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[   33.410599][  T624] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.410869][  T624] CR2: 00005632e9a7c2f8 CR3: 0000000009fba004 CR4: 0000000000772ef0
[   33.411191][  T624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.411501][  T624] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.411812][  T624] PKRU: 55555554
[   33.411973][  T624] Call Trace:
[   33.412148][  T624]  <TASK>
[ 33.412351][ T624] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.412566][ T624] ? __warn (kernel/panic.c:748) 
[ 33.412728][ T624] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.412937][ T624] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 33.413160][ T624] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 33.413322][ T624] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 33.413530][ T624] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 33.413756][ T624] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 33.413964][ T624] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 33.414190][ T624] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 33.414453][ T624] ? _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) 
[ 33.414665][ T624] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 33.414877][ T624] register_netdevice (net/core/dev.c:11003) 
[ 33.415112][ T624] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 33.415318][ T624] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 33.415545][ T624] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 33.415767][ T624] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 33.416042][ T624] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 33.416203][ T624] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 33.416476][ T624] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 33.416750][ T624] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 33.417030][ T624] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 33.417258][ T624] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 33.417520][ T624] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 33.417728][ T624] ? 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)) 
[ 33.417886][ T624] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 33.418135][ T624] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 33.418350][ T624] __driver_probe_device (drivers/base/dd.c:800) 
[ 33.418561][ T624] driver_probe_device (drivers/base/dd.c:830) 
[ 33.418769][ T624] __device_attach_driver (drivers/base/dd.c:959) 
[ 33.418980][ T624] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 33.419244][ T624] bus_for_each_drv (drivers/base/bus.c:462) 
[ 33.419458][ T624] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 33.419668][ T624] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 33.419874][ T624] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 33.420090][ T624] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 33.420305][ T624] __device_attach (drivers/base/dd.c:1030) 
[ 33.420513][ T624] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 33.420723][ T624] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 33.420929][ T624] ? 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) 
[ 33.421159][ T624] bus_probe_device (drivers/base/bus.c:537) 
[ 33.421370][ T624] device_add (drivers/base/core.c:3672) 
[ 33.421580][ T624] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 33.421784][ T624] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 33.422019][ T624] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 33.422291][ T624] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 33.422561][ T624] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 33.422790][ T624] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 33.423015][ T624] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 33.423222][ T624] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 33.423436][ T624] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 33.423604][ T624] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 33.423816][ T624] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 33.424029][ T624] ? 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) 
[ 33.424251][ T624] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 33.424467][ T624] ksys_write (fs/read_write.c:731) 
[ 33.424626][ T624] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 33.424832][ T624] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 33.425064][ T624] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.425274][ T624] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.425533][  T624] RIP: 0033:0x7fc87fa6ab77
[ 33.425750][ T624] 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
[   33.426485][  T624] RSP: 002b:00007ffda4f5c1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   33.426800][  T624] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fc87fa6ab77
[   33.427118][  T624] RDX: 0000000000000007 RSI: 00005632e9a7b2f0 RDI: 0000000000000001
[   33.427434][  T624] RBP: 00005632e9a7b2f0 R08: 0000000000000006 R09: 0000000000000077
[   33.427746][  T624] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   33.428066][  T624] R13: 00007fc87fb26760 R14: 0000000000000007 R15: 00007fc87fb219c0
| [   48.501118][  T671] ------------[ cut here ]------------
| [ 48.501519][ T671] WARNING: CPU: 3 PID: 671 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) 
| [   48.501963][  T671] Modules linked in: drop_monitor act_gact cls_flower sch_ingress netdevsim psample
| [   48.502764][  T671] Tainted: [W]=WARN
[   48.502951][  T671] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 48.503332][ T671] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 48.503613][ T671] 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
[   48.504462][  T671] RSP: 0018:ffffc90000697528 EFLAGS: 00010246
[   48.504749][  T671] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   48.505168][  T671] RDX: 0000000000000000 RSI: ffff888004feacd0 RDI: ffff88800b9050f8
[   48.505506][  T671] RBP: ffff88800c975500 R08: 0000000000000000 R09: fffffbfff7542504
[   48.505836][  T671] R10: ffffffffbaa12827 R11: ffff88800b9045c0 R12: 0000000000000000
[   48.506254][  T671] R13: ffff888004fea130 R14: ffff888004fea008 R15: ffff888004fea000
[   48.506588][  T671] FS:  00007fc2d388d740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[   48.506967][  T671] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.507371][  T671] CR2: 0000564f8b2ac2f8 CR3: 0000000002684003 CR4: 0000000000772ef0
[   48.507701][  T671] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   48.508123][  T671] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   48.508451][  T671] PKRU: 55555554
[   48.508620][  T671] Call Trace:
[   48.508785][  T671]  <TASK>
[ 48.508900][ T671] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 48.509221][ T671] ? __warn (kernel/panic.c:748) 
[ 48.509393][ T671] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 48.509618][ T671] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 48.509847][ T671] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 48.510106][ T671] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 48.510330][ T671] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 48.510564][ T671] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 48.510787][ T671] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 48.511104][ T671] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 48.511384][ T671] ? _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) 
[ 48.511612][ T671] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 48.511838][ T671] register_netdevice (net/core/dev.c:11003) 
[ 48.512135][ T671] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 48.512356][ T671] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 48.512591][ T671] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 48.512827][ T671] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 48.513119][ T671] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 48.513442][ T671] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 48.513736][ T671] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 48.514033][ T671] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 48.514321][ T671] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 48.514556][ T671] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 48.514835][ T671] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 48.515076][ T671] ? 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)) 
[ 48.515247][ T671] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 48.515501][ T671] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 48.515729][ T671] __driver_probe_device (drivers/base/dd.c:800) 
[ 48.515955][ T671] driver_probe_device (drivers/base/dd.c:830) 
[ 48.516190][ T671] __device_attach_driver (drivers/base/dd.c:959) 
[ 48.516413][ T671] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 48.516684][ T671] bus_for_each_drv (drivers/base/bus.c:462) 
[ 48.516905][ T671] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 48.517135][ T671] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 48.517356][ T671] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 48.517576][ T671] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 48.517801][ T671] __device_attach (drivers/base/dd.c:1030) 
[ 48.518029][ T671] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 48.518251][ T671] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 48.518471][ T671] ? 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) 
[ 48.518705][ T671] bus_probe_device (drivers/base/bus.c:537) 
[ 48.518928][ T671] device_add (drivers/base/core.c:3672) 
[ 48.519162][ T671] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 48.519382][ T671] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 48.519623][ T671] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 48.519910][ T671] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 48.520206][ T671] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 48.520426][ T671] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 48.520653][ T671] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 48.520871][ T671] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 48.521109][ T671] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 48.521286][ T671] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 48.521512][ T671] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 48.521730][ T671] ? 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) 
[ 48.521959][ T671] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 48.522196][ T671] ksys_write (fs/read_write.c:731) 
[ 48.522366][ T671] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 48.522585][ T671] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 48.522816][ T671] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 48.523050][ T671] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   48.523322][  T671] RIP: 0033:0x7fc2d39ceb77
[ 48.523548][ T671] 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
[   48.524321][  T671] RSP: 002b:00007fff95c36498 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   48.524651][  T671] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fc2d39ceb77
[   48.524972][  T671] RDX: 0000000000000007 RSI: 0000564f8b2ab2f0 RDI: 0000000000000001
[   48.525310][  T671] RBP: 0000564f8b2ab2f0 R08: 0000000000000006 R09: 0000000000000077
[   48.525643][  T671] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007


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