======================================
| 0
| xx__-> [ 4211.997558][ T4771] ------------[ cut here ]------------
| [ 4211.998068][ T4771] WARNING: CPU: 2 PID: 4771 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) 
| [ 4211.998566][ T4771] Modules linked in: netdevsim psample cls_matchall geneve ip6_gre ip_gre gre sha1_generic xfrm_user xt_policy nft_compat nf_tables act_gact cls_flower sch_ingress vxlan
[ 4211.999842][ T4771] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4212.000172][ T4771] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4212.000482][ T4771] 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
[ 4212.001307][ T4771] RSP: 0018:ffffc90000507528 EFLAGS: 00010246
[ 4212.001623][ T4771] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4212.001966][ T4771] RDX: 0000000000000000 RSI: ffff88801d722cd0 RDI: ffff88800bbf2e38
[ 4212.002335][ T4771] RBP: ffff888009200040 R08: 0000000000000000 R09: fffffbfff3ec2504
[ 4212.002692][ T4771] R10: ffffffff9f612827 R11: ffff88800bbf2300 R12: 0000000000000000
[ 4212.003030][ T4771] R13: ffff88801d722130 R14: ffff88801d722008 R15: ffff88801d722000
[ 4212.003379][ T4771] FS:  00007eff273aa740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 4212.003772][ T4771] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4212.004079][ T4771] CR2: 000055ac0d72cdec CR3: 00000000123ae004 CR4: 0000000000772ef0
[ 4212.004437][ T4771] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4212.004780][ T4771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4212.005130][ T4771] PKRU: 55555554
[ 4212.005337][ T4771] Call Trace:
[ 4212.005522][ T4771]  <TASK>
[ 4212.005681][ T4771] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4212.005921][ T4771] ? __warn (kernel/panic.c:748) 
[ 4212.006108][ T4771] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4212.006356][ T4771] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4212.006601][ T4771] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4212.006812][ T4771] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4212.007053][ T4771] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4212.007313][ T4771] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4212.007552][ T4771] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4212.007791][ T4771] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4212.008085][ T4771] ? _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) 
[ 4212.008337][ T4771] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4212.008585][ T4771] register_netdevice (net/core/dev.c:11003) 
[ 4212.008829][ T4771] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4212.009070][ T4771] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4212.009326][ T4771] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4212.009573][ T4771] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4212.009864][ T4771] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4212.010045][ T4771] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4212.010357][ T4771] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4212.010646][ T4771] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4212.010941][ T4771] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4212.011191][ T4771] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4212.011481][ T4771] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4212.011712][ T4771] ? 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)) 
[ 4212.011913][ T4771] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4212.012167][ T4771] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4212.012412][ T4771] __driver_probe_device (drivers/base/dd.c:800) 
[ 4212.012650][ T4771] driver_probe_device (drivers/base/dd.c:830) 
[ 4212.012889][ T4771] __device_attach_driver (drivers/base/dd.c:959) 
[ 4212.013126][ T4771] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4212.013424][ T4771] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4212.013669][ T4771] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4212.013903][ T4771] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4212.014135][ T4771] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4212.014388][ T4771] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4212.014627][ T4771] __device_attach (drivers/base/dd.c:1030) 
[ 4212.014857][ T4771] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4212.015084][ T4771] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4212.015328][ T4771] ? 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) 
[ 4212.015574][ T4771] bus_probe_device (drivers/base/bus.c:537) 
[ 4212.015805][ T4771] device_add (drivers/base/core.c:3672) 
[ 4212.016066][ T4771] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4212.016308][ T4771] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4212.016556][ T4771] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4212.016855][ T4771] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4212.017172][ T4771] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4212.017406][ T4771] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4212.017650][ T4771] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4212.017891][ T4771] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4212.018130][ T4771] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4212.018330][ T4771] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4212.018569][ T4771] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 4212.018799][ T4771] ? 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) 
[ 4212.019037][ T4771] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4212.019283][ T4771] ksys_write (fs/read_write.c:731) 
[ 4212.019461][ T4771] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4212.019690][ T4771] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 4212.019926][ T4771] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4212.020168][ T4771] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4212.020443][ T4771] RIP: 0033:0x7eff274ebb77
[ 4212.020686][ T4771] 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
[ 4212.021448][ T4771] RSP: 002b:00007ffc4cb596c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4212.021792][ T4771] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007eff274ebb77
[ 4212.022133][ T4771] RDX: 0000000000000007 RSI: 0000560903d8a2f0 RDI: 0000000000000001
[ 4212.022477][ T4771] RBP: 0000560903d8a2f0 R08: 0000000000000006 R09: 0000000000000077
[ 4212.022810][ T4771] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[ 4212.023160][ T4771] R13: 00007eff275a7760 R14: 0000000000000007 R15: 00007eff275a29c0
| [ 4227.166015][ T4812] ------------[ cut here ]------------
| [ 4227.166450][ T4812] WARNING: CPU: 3 PID: 4812 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) 
| [ 4227.166877][ T4812] Modules linked in: drop_monitor netdevsim psample cls_matchall geneve ip6_gre ip_gre gre sha1_generic xfrm_user xt_policy nft_compat nf_tables act_gact cls_flower sch_ingress vxlan
| [ 4227.168266][ T4812] Tainted: [W]=WARN
[ 4227.168455][ T4812] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4227.168712][ T4812] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4227.168984][ T4812] 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
[ 4227.169744][ T4812] RSP: 0018:ffffc90000747528 EFLAGS: 00010246
[ 4227.170011][ T4812] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4227.170330][ T4812] RDX: 0000000000000000 RSI: ffff88801436acd0 RDI: ffff88800c388b78
[ 4227.170645][ T4812] RBP: ffff8880092038c0 R08: 0000000000000000 R09: fffffbfff3ec2504
[ 4227.170951][ T4812] R10: ffffffff9f612827 R11: ffff88800c388040 R12: 0000000000000000
[ 4227.171271][ T4812] R13: ffff88801436a130 R14: ffff88801436a008 R15: ffff88801436a000
[ 4227.171579][ T4812] FS:  00007f0778150740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[ 4227.171939][ T4812] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4227.172217][ T4812] CR2: 0000559b508fa2f8 CR3: 00000000024e8006 CR4: 0000000000772ef0
[ 4227.172528][ T4812] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4227.172834][ T4812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4227.173138][ T4812] PKRU: 55555554
[ 4227.173324][ T4812] Call Trace:
[ 4227.173488][ T4812]  <TASK>
[ 4227.173596][ T4812] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4227.173803][ T4812] ? __warn (kernel/panic.c:748) 
[ 4227.173964][ T4812] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4227.174187][ T4812] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4227.174403][ T4812] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4227.174566][ T4812] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4227.174779][ T4812] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4227.175005][ T4812] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4227.175230][ T4812] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4227.175446][ T4812] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4227.175721][ T4812] ? _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) 
[ 4227.175936][ T4812] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4227.176166][ T4812] register_netdevice (net/core/dev.c:11003) 
[ 4227.176386][ T4812] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4227.176594][ T4812] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4227.176822][ T4812] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4227.177048][ T4812] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4227.177338][ T4812] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4227.177503][ T4812] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4227.177780][ T4812] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4227.178049][ T4812] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4227.178330][ T4812] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4227.178552][ T4812] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4227.178816][ T4812] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4227.179028][ T4812] ? 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)) 
[ 4227.179202][ T4812] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4227.179426][ T4812] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4227.179644][ T4812] __driver_probe_device (drivers/base/dd.c:800) 
[ 4227.179856][ T4812] driver_probe_device (drivers/base/dd.c:830) 
[ 4227.180066][ T4812] __device_attach_driver (drivers/base/dd.c:959) 
[ 4227.180298][ T4812] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4227.180557][ T4812] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4227.180767][ T4812] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4227.180977][ T4812] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4227.181212][ T4812] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4227.181421][ T4812] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4227.181635][ T4812] __device_attach (drivers/base/dd.c:1030) 
[ 4227.181843][ T4812] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4227.182049][ T4812] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4227.182274][ T4812] ? 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) 
[ 4227.182496][ T4812] bus_probe_device (drivers/base/bus.c:537) 
[ 4227.182710][ T4812] device_add (drivers/base/core.c:3672) 
[ 4227.182921][ T4812] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4227.183135][ T4812] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4227.183371][ T4812] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4227.183642][ T4812] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4227.183913][ T4812] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4227.184124][ T4812] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4227.184355][ T4812] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4227.184562][ T4812] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4227.184775][ T4812] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4227.184944][ T4812] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4227.185182][ T4812] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 4227.185389][ T4812] ? 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) 
[ 4227.185621][ T4812] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4227.185838][ T4812] ksys_write (fs/read_write.c:731) 
[ 4227.185999][ T4812] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4227.186218][ T4812] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 4227.186441][ T4812] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4227.186653][ T4812] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4227.186910][ T4812] RIP: 0033:0x7f0778291b77
[ 4227.187131][ T4812] 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
[ 4227.187857][ T4812] RSP: 002b:00007ffe0103c488 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4227.188184][ T4812] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f0778291b77
[ 4227.188502][ T4812] RDX: 0000000000000007 RSI: 0000559b508f92f0 RDI: 0000000000000001
[ 4227.188809][ T4812] RBP: 0000559b508f92f0 R08: 0000000000000006 R09: 0000000000000077
[ 4227.189116][ T4812] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007


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