======================================
| 0
| xx__-> [   10.861376][  T228] ------------[ cut here ]------------
| [ 10.861788][ T228] WARNING: CPU: 2 PID: 228 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) 
| [   10.862307][  T228] Modules linked in: netdevsim
[   10.863104][  T228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 10.863419][ T228] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.863715][ T228] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 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:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  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
[   10.864527][  T228] RSP: 0018:ffffc90000b07520 EFLAGS: 00010246
[   10.864831][  T228] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   10.865191][  T228] RDX: 0000000000000000 RSI: ffff88800d1f2c98 RDI: ffff88800ae00b78
[   10.865549][  T228] RBP: ffffffff98d23440 R08: 0000000000000000 R09: fffffbfff2d7d83c
[   10.865904][  T228] R10: ffffffff96bec1e7 R11: ffff88800ae00040 R12: 0000000000000000
[   10.866268][  T228] R13: ffff88800d1f2128 R14: ffff88800d1f2008 R15: ffff88800d1f2000
[   10.866635][  T228] FS:  00007f738ae1d740(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   10.867059][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   10.867383][  T228] CR2: 000055835161d4c8 CR3: 00000000028a4001 CR4: 0000000000772ef0
[   10.867732][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.868099][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   10.868456][  T228] PKRU: 55555554
[   10.868645][  T228] Call Trace:
[   10.868841][  T228]  <TASK>
[ 10.868973][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.869240][ T228] ? __warn (kernel/panic.c:748) 
[ 10.869432][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.869683][ T228] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 10.869934][ T228] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 10.870139][ T228] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 10.870394][ T228] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 10.870642][ T228] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 10.870900][ T228] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 10.871208][ T228] ? _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) 
[ 10.871458][ T228] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 10.871699][ T228] register_netdevice (net/core/dev.c:11003) 
[ 10.871963][ T228] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 10.872227][ T228] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 10.872484][ T228] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 10.872777][ T228] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 10.872970][ T228] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 10.873289][ T228] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 10.873589][ T228] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 10.873895][ T228] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 10.874161][ T228] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 10.874455][ T228] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 10.874695][ T228] ? 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)) 
[ 10.874874][ T228] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 10.875118][ T228] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 10.875352][ T228] __driver_probe_device (drivers/base/dd.c:800) 
[ 10.875575][ T228] driver_probe_device (drivers/base/dd.c:830) 
[ 10.875795][ T228] __device_attach_driver (drivers/base/dd.c:959) 
[ 10.876023][ T228] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 10.876310][ T228] bus_for_each_drv (drivers/base/bus.c:462) 
[ 10.876533][ T228] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 10.876756][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.876995][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 10.877244][ T228] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 10.877478][ T228] __device_attach (drivers/base/dd.c:1030) 
[ 10.877703][ T228] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 10.877926][ T228] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 10.878165][ T228] ? 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) 
[ 10.878415][ T228] bus_probe_device (drivers/base/bus.c:537) 
[ 10.878660][ T228] device_add (drivers/base/core.c:3672) 
[ 10.878909][ T228] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 10.879160][ T228] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 10.879411][ T228] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 10.879715][ T228] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 10.880018][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.880263][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 10.880493][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 10.880721][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 10.880983][ T228] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 10.881216][ T228] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 10.881463][ T228] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 10.881699][ T228] ? 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) 
[ 10.881967][ T228] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 10.882252][ T228] ksys_write (fs/read_write.c:731) 
[ 10.882450][ T228] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 10.882683][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 10.882933][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 10.883189][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   10.883478][  T228] RIP: 0033:0x7f738af5eb77
[ 10.883726][ T228] 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
[   10.884540][  T228] RSP: 002b:00007ffc3c216868 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   10.884917][  T228] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f738af5eb77
[   10.885268][  T228] RDX: 0000000000000007 RSI: 000055835161c4c0 RDI: 0000000000000001
[   10.885594][  T228] RBP: 000055835161c4c0 R08: 0000000000000003 R09: 0000000000000077
[   10.885930][  T228] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[   10.886324][  T228] R13: 00007f738b01a760 R14: 0000000000000007 R15: 00007f738b0159c0
| [   11.214694][  T256] ------------[ cut here ]------------
| [ 11.215125][ T256] WARNING: CPU: 0 PID: 256 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) 
| [   11.215618][  T256] Modules linked in: netdevsim
| [   11.216208][  T256] Tainted: [W]=WARN
[   11.216397][  T256] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 11.216661][ T256] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.216919][ T256] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 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:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  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
[   11.217638][  T256] RSP: 0018:ffffc900005a71e8 EFLAGS: 00010246
[   11.217911][  T256] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   11.218227][  T256] RDX: 0000000000000000 RSI: ffff88800ab12c98 RDI: ffff88800a882dc0
[   11.218534][  T256] RBP: ffff88800aba8040 R08: 0000000000000000 R09: fffffbfff2d7d83c
[   11.218846][  T256] R10: ffffffff96bec1e7 R11: ffff88800a882300 R12: 0000000000000000
[   11.219160][  T256] R13: ffff88800ab12128 R14: ffff88800ab12008 R15: ffff88800ab12000
[   11.219458][  T256] FS:  00007f8485528800(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   11.219809][  T256] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   11.220059][  T256] CR2: 0000564286606078 CR3: 0000000009eb6006 CR4: 0000000000772ef0
[   11.220397][  T256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   11.220715][  T256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   11.221013][  T256] PKRU: 55555554
[   11.221166][  T256] Call Trace:
[   11.221313][  T256]  <TASK>
[ 11.221412][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.221608][ T256] ? __warn (kernel/panic.c:748) 
[ 11.221756][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.221989][ T256] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 11.222196][ T256] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 11.222356][ T256] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 11.222549][ T256] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 11.222762][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 11.222958][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 11.223191][ T256] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 11.223454][ T256] ? _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) 
[ 11.223650][ T256] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 11.223868][ T256] register_netdevice (net/core/dev.c:11003) 
[ 11.224062][ T256] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 11.224287][ T256] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 11.224503][ T256] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 11.224749][ T256] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 11.225019][ T256] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 11.225312][ T256] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 11.225575][ T256] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 11.225828][ T256] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 11.226100][ T256] devlink_reload (net/devlink/dev.c:474) 
[ 11.226312][ T256] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 11.226507][ T256] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 11.226711][ T256] ? cap_capable (security/commoncap.c:131) 
[ 11.226914][ T256] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 11.227097][ T256] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 11.227292][ T256] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.227540][ T256] ? __nla_parse (lib/nlattr.c:732) 
[ 11.227759][ T256] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 11.227953][ T256] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 11.228228][ T256] ? cap_capable (security/commoncap.c:131) 
[ 11.228434][ T256] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 11.228652][ T256] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 11.228862][ T256] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 11.229075][ T256] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 11.229317][ T256] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 11.229551][ T256] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 11.229803][ T256] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 11.229998][ T256] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 11.230207][ T256] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 11.230404][ T256] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 11.230626][ T256] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 11.230783][ T256] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 11.230978][ T256] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 11.231205][ T256] genl_rcv (net/netlink/genetlink.c:1220) 
[ 11.231358][ T256] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 11.231567][ T256] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 11.231784][ T256] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 11.232010][ T256] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 11.232240][ T256] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 11.232446][ T256] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 11.232657][ T256] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 11.232875][ T256] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 11.233090][ T256] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 11.233288][ T256] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 11.233493][ T256] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 11.233702][ T256] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.233913][ T256] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 11.234165][ T256] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 11.234379][ T256] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 11.234623][ T256] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 11.234824][ T256] __x64_sys_sendto (net/socket.c:2181) 
[ 11.235020][ T256] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 11.235294][ T256] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 11.235491][ T256] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   11.235741][  T256] RIP: 0033:0x7f8485734a4a
[ 11.235944][ T256] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[   11.236681][  T256] RSP: 002b:00007ffd39d74b78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   11.236979][  T256] RAX: ffffffffffffffda RBX: 00000000082b6b00 RCX: 00007f8485734a4a
[   11.237295][  T256] RDX: 0000000000000040 RSI: 00000000082b6b00 RDI: 0000000000000005
[   11.237604][  T256] RBP: 00000000082b6910 R08: 00007f84858d8200 R09: 000000000000000c
[   11.237909][  T256] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[   11.238233][  T256] R13: 00000000082b6910 R14: 0000000000000000 R15: 0000000000000001
| [   37.878039][   T66] ------------[ cut here ]------------
| [ 37.878403][ T66] WARNING: CPU: 2 PID: 66 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) 
| [   37.878780][   T66] Modules linked in: netdevsim
| [   37.879371][   T66] Tainted: [W]=WARN
[   37.879519][   T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   37.879760][   T66] Workqueue: netns cleanup_net
[ 37.880002][ T66] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.880252][ T66] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 98 0c 00 00 be ff ff ff ff e8 d8 33 78 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:	a3 4a fe ff 48 8b 5c 	movabs %eax,0x58245c8b48fffe4a
   9:	24 58 
   b:	e9 87 fb ff ff       	jmp    0xfffffffffffffb97
  10:	49 8d bf 98 0c 00 00 	lea    0xc98(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 d8 33 78 00       	call   0x7833f9
  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
[   37.880873][   T66] RSP: 0018:ffffc90000477620 EFLAGS: 00010246
[   37.881116][   T66] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   37.881380][   T66] RDX: 0000000000000000 RSI: ffff88800d1fac98 RDI: ffff8880084c50d0
[   37.881660][   T66] RBP: ffffffff98d23440 R08: 0000000000000000 R09: fffffbfff2d7d83c
[   37.881972][   T66] R10: ffffffff96bec1e7 R11: ffff8880084c45c0 R12: 0000000000000000
[   37.882262][   T66] R13: ffff88800d1fa128 R14: ffff88800d1fa008 R15: ffff88800d1fa000
[   37.882535][   T66] FS:  0000000000000000(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   37.883090][   T66] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.883326][   T66] CR2: 00007fceeb815000 CR3: 0000000023b28002 CR4: 0000000000772ef0
[   37.883599][   T66] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.883875][   T66] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.884150][   T66] PKRU: 55555554
[   37.884297][   T66] Call Trace:
[   37.884440][   T66]  <TASK>
[ 37.884549][ T66] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.884738][ T66] ? __warn (kernel/panic.c:748) 
[ 37.884889][ T66] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.885092][ T66] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 37.885286][ T66] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 37.885434][ T66] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 37.885621][ T66] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 37.885855][ T66] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 37.886077][ T66] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 37.886316][ T66] ? _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) 
[ 37.886512][ T66] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 37.886710][ T66] register_netdevice (net/core/dev.c:11003) 
[ 37.886905][ T66] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 37.887115][ T66] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 37.887326][ T66] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 37.887575][ T66] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 37.887822][ T66] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 37.888118][ T66] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 37.888363][ T66] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 37.888601][ T66] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 37.888846][ T66] devlink_reload (net/devlink/dev.c:474) 
[ 37.889043][ T66] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 37.889252][ T66] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 37.889455][ T66] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 37.889650][ T66] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 37.889969][ T66] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 37.890297][ T66] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 37.890614][ T66] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 37.890909][ T66] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 37.891241][ T66] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 37.891507][ T66] ? process_one_work (kernel/workqueue.c:3214) 
[ 37.891845][ T66] process_one_work (kernel/workqueue.c:3238) 
[ 37.892198][ T66] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 37.892505][ T66] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 37.892829][ T66] ? assign_work (kernel/workqueue.c:1200) 
[ 37.893166][ T66] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 37.893477][ T66] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 37.893860][ T66] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 37.894176][ T66] kthread (kernel/kthread.c:464) 
[ 37.894412][ T66] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.894725][ T66] ? __pfx_kthread (kernel/kthread.c:413) 
[ 37.895033][ T66] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 37.895361][ T66] ? __pfx_kthread (kernel/kthread.c:413) 


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