======================================
| 0
| xx__-> [ 4531.757582][ T9528] ------------[ cut here ]------------
| [ 4531.758197][ T9528] WARNING: CPU: 2 PID: 9528 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) 
| [ 4531.758695][ T9528] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp sch_fq ip6t_rpfilter xfrm_interface xt_length act_ct nf_flow_table nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 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
[ 4531.760545][ T9528] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4531.760874][ T9528] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4531.761243][ T9528] 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
[ 4531.762121][ T9528] RSP: 0018:ffffc900002cf528 EFLAGS: 00010246
[ 4531.762437][ T9528] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4531.762807][ T9528] RDX: 0000000000000000 RSI: ffff888011e7acd0 RDI: ffff888002742e38
[ 4531.763200][ T9528] RBP: ffff88800e37d500 R08: 0000000000000000 R09: fffffbfff3cc2504
[ 4531.763571][ T9528] R10: ffffffff9e612827 R11: ffff888002742300 R12: 0000000000000000
[ 4531.763941][ T9528] R13: ffff888011e7a130 R14: ffff888011e7a008 R15: ffff888011e7a000
[ 4531.764347][ T9528] FS:  00007fa239302740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 4531.764785][ T9528] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4531.765146][ T9528] CR2: 000055c23d3a52f8 CR3: 00000000026b2006 CR4: 0000000000772ef0
[ 4531.765516][ T9528] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4531.765900][ T9528] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4531.766296][ T9528] PKRU: 55555554
[ 4531.766499][ T9528] Call Trace:
[ 4531.766701][ T9528]  <TASK>
[ 4531.766843][ T9528] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4531.767111][ T9528] ? __warn (kernel/panic.c:748) 
[ 4531.767311][ T9528] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4531.767562][ T9528] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4531.767823][ T9528] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4531.768028][ T9528] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4531.768318][ T9528] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4531.768588][ T9528] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4531.768842][ T9528] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4531.769112][ T9528] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4531.769427][ T9528] ? _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) 
[ 4531.769683][ T9528] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4531.769957][ T9528] register_netdevice (net/core/dev.c:11003) 
[ 4531.770262][ T9528] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4531.770517][ T9528] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4531.770780][ T9528] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4531.771048][ T9528] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4531.771390][ T9528] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4531.771592][ T9528] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4531.771920][ T9528] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4531.772276][ T9528] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4531.772601][ T9528] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4531.772866][ T9528] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4531.773194][ T9528] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4531.773449][ T9528] ? 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)) 
[ 4531.773650][ T9528] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4531.773913][ T9528] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4531.774190][ T9528] __driver_probe_device (drivers/base/dd.c:800) 
[ 4531.774447][ T9528] driver_probe_device (drivers/base/dd.c:830) 
[ 4531.774699][ T9528] __device_attach_driver (drivers/base/dd.c:959) 
[ 4531.774952][ T9528] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4531.775271][ T9528] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4531.775528][ T9528] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4531.775780][ T9528] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4531.776063][ T9528] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4531.776348][ T9528] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4531.776609][ T9528] __device_attach (drivers/base/dd.c:1030) 
[ 4531.776859][ T9528] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4531.777123][ T9528] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4531.777383][ T9528] ? 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) 
[ 4531.777648][ T9528] bus_probe_device (drivers/base/bus.c:537) 
[ 4531.777902][ T9528] device_add (drivers/base/core.c:3672) 
[ 4531.778166][ T9528] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4531.778417][ T9528] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4531.778693][ T9528] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4531.779017][ T9528] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4531.779353][ T9528] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4531.779603][ T9528] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4531.779860][ T9528] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4531.780141][ T9528] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4531.780404][ T9528] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4531.780610][ T9528] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4531.780867][ T9528] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 4531.781138][ T9528] ? 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) 
[ 4531.781401][ T9528] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4531.781658][ T9528] ksys_write (fs/read_write.c:731) 
[ 4531.781852][ T9528] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4531.782118][ T9528] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 4531.782378][ T9528] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4531.782633][ T9528] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4531.782940][ T9528] RIP: 0033:0x7fa239443b77
[ 4531.783218][ T9528] 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
[ 4531.784044][ T9528] RSP: 002b:00007ffda5ea38c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4531.784443][ T9528] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fa239443b77
[ 4531.784820][ T9528] RDX: 0000000000000007 RSI: 000055c23d3a42f0 RDI: 0000000000000001
[ 4531.785201][ T9528] RBP: 000055c23d3a42f0 R08: 0000000000000006 R09: 0000000000000077
[ 4531.785568][ T9528] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[ 4531.785956][ T9528] R13: 00007fa2394ff760 R14: 0000000000000007 R15: 00007fa2394fa9c0
| [ 4546.816708][ T9570] ------------[ cut here ]------------
| [ 4546.817078][ T9570] WARNING: CPU: 3 PID: 9570 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) 
| [ 4546.817745][ T9570] Modules linked in: drop_monitor netdevsim psample dccp_ipv6 dccp_ipv4 dccp sch_fq ip6t_rpfilter xfrm_interface xt_length act_ct nf_flow_table nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 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
| [ 4546.819478][ T9570] Tainted: [W]=WARN
[ 4546.819662][ T9570] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4546.819926][ T9570] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4546.820208][ T9570] 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
[ 4546.820924][ T9570] RSP: 0018:ffffc90000537528 EFLAGS: 00010246
[ 4546.821207][ T9570] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4546.821522][ T9570] RDX: 0000000000000000 RSI: ffff88800be3acd0 RDI: ffff88801432d0f8
[ 4546.821831][ T9570] RBP: ffff88800e378040 R08: 0000000000000000 R09: fffffbfff3cc2504
[ 4546.822160][ T9570] R10: ffffffff9e612827 R11: ffff88801432c5c0 R12: 0000000000000000
[ 4546.822474][ T9570] R13: ffff88800be3a130 R14: ffff88800be3a008 R15: ffff88800be3a000
[ 4546.822786][ T9570] FS:  00007f391ca39740(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[ 4546.823169][ T9570] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4546.823431][ T9570] CR2: 0000560f8b59f2f8 CR3: 0000000011f64003 CR4: 0000000000772ef0
[ 4546.823742][ T9570] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4546.824052][ T9570] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4546.824386][ T9570] PKRU: 55555554
[ 4546.824544][ T9570] Call Trace:
[ 4546.824700][ T9570]  <TASK>
[ 4546.824810][ T9570] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4546.825021][ T9570] ? __warn (kernel/panic.c:748) 
[ 4546.825196][ T9570] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4546.825412][ T9570] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4546.825627][ T9570] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4546.825798][ T9570] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4546.826010][ T9570] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4546.826250][ T9570] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4546.826463][ T9570] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4546.826678][ T9570] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4546.826952][ T9570] ? _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) 
[ 4546.827194][ T9570] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4546.827421][ T9570] register_netdevice (net/core/dev.c:11003) 
[ 4546.827636][ T9570] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4546.827843][ T9570] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4546.828069][ T9570] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4546.828314][ T9570] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4546.828590][ T9570] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4546.828756][ T9570] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4546.829037][ T9570] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4546.829335][ T9570] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4546.829608][ T9570] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4546.829830][ T9570] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4546.830122][ T9570] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4546.830339][ T9570] ? 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)) 
[ 4546.830499][ T9570] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4546.830718][ T9570] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4546.830934][ T9570] __driver_probe_device (drivers/base/dd.c:800) 
[ 4546.831168][ T9570] driver_probe_device (drivers/base/dd.c:830) 
[ 4546.831378][ T9570] __device_attach_driver (drivers/base/dd.c:959) 
[ 4546.831594][ T9570] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4546.831851][ T9570] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4546.832062][ T9570] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4546.832281][ T9570] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4546.832491][ T9570] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4546.832708][ T9570] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4546.832924][ T9570] __device_attach (drivers/base/dd.c:1030) 
[ 4546.833148][ T9570] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4546.833355][ T9570] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4546.833564][ T9570] ? 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) 
[ 4546.833779][ T9570] bus_probe_device (drivers/base/bus.c:537) 
[ 4546.833992][ T9570] device_add (drivers/base/core.c:3672) 
[ 4546.834222][ T9570] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4546.834429][ T9570] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4546.834656][ T9570] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4546.834927][ T9570] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4546.835217][ T9570] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4546.835423][ T9570] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4546.835639][ T9570] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4546.835875][ T9570] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4546.836109][ T9570] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4546.836284][ T9570] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4546.836501][ T9570] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 4546.836707][ T9570] ? 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) 
[ 4546.836925][ T9570] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4546.837157][ T9570] ksys_write (fs/read_write.c:731) 
[ 4546.837318][ T9570] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4546.837525][ T9570] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 4546.837745][ T9570] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4546.837973][ T9570] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4546.838248][ T9570] RIP: 0033:0x7f391cb7ab77
[ 4546.838462][ T9570] 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
[ 4546.839195][ T9570] RSP: 002b:00007ffeb6e95538 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4546.839515][ T9570] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f391cb7ab77
[ 4546.839822][ T9570] RDX: 0000000000000007 RSI: 0000560f8b59e2f0 RDI: 0000000000000001
[ 4546.840145][ T9570] RBP: 0000560f8b59e2f0 R08: 0000000000000006 R09: 0000000000000077
[ 4546.840455][ T9570] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007


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