======================================
| 0
| xx__-> [    9.494826][  T229] ------------[ cut here ]------------
| [ 9.495210][ T229] WARNING: CPU: 0 PID: 229 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) 
| [    9.495742][  T229] Modules linked in: netdevsim
[    9.496375][  T229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.496649][ T229] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.496933][ T229] 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
[    9.497697][  T229] RSP: 0018:ffffc90000b07520 EFLAGS: 00010246
[    9.497979][  T229] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.498316][  T229] RDX: 0000000000000000 RSI: ffff888004ee2c98 RDI: ffff88800918d0f8
[    9.498639][  T229] RBP: ffffffffaa523440 R08: 0000000000000000 R09: fffffbfff507d83c
[    9.498963][  T229] R10: ffffffffa83ec1e7 R11: ffff88800918c5c0 R12: 0000000000000000
[    9.499299][  T229] R13: ffff888004ee2128 R14: ffff888004ee2008 R15: ffff888004ee2000
[    9.499625][  T229] FS:  00007f5af6081740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[    9.500011][  T229] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.500288][  T229] CR2: 0000564fc21444c8 CR3: 0000000004ee8004 CR4: 0000000000772ef0
[    9.500619][  T229] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.500947][  T229] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.501283][  T229] PKRU: 55555554
[    9.501454][  T229] Call Trace:
[    9.501623][  T229]  <TASK>
[ 9.501740][ T229] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.501965][ T229] ? __warn (kernel/panic.c:748) 
[ 9.502154][ T229] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.502378][ T229] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.502602][ T229] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.502771][ T229] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.503003][ T229] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.503237][ T229] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.503465][ T229] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.503744][ T229] ? _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) 
[ 9.503970][ T229] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.504204][ T229] register_netdevice (net/core/dev.c:11003) 
[ 9.504433][ T229] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.504664][ T229] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.504899][ T229] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.505187][ T229] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 9.505357][ T229] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.505646][ T229] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.505925][ T229] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 9.506215][ T229] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 9.506448][ T229] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 9.506723][ T229] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 9.506943][ T229] ? 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)) 
[ 9.507117][ T229] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 9.507344][ T229] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 9.507567][ T229] __driver_probe_device (drivers/base/dd.c:800) 
[ 9.507787][ T229] driver_probe_device (drivers/base/dd.c:830) 
[ 9.508018][ T229] __device_attach_driver (drivers/base/dd.c:959) 
[ 9.508239][ T229] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 9.508505][ T229] bus_for_each_drv (drivers/base/bus.c:462) 
[ 9.508725][ T229] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 9.508941][ T229] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.509166][ T229] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.509390][ T229] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 9.509614][ T229] __device_attach (drivers/base/dd.c:1030) 
[ 9.509833][ T229] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 9.510058][ T229] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 9.510282][ T229] ? 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) 
[ 9.510509][ T229] bus_probe_device (drivers/base/bus.c:537) 
[ 9.510732][ T229] device_add (drivers/base/core.c:3672) 
[ 9.510960][ T229] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 9.511189][ T229] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 9.511420][ T229] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 9.511703][ T229] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 9.511988][ T229] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.512220][ T229] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 9.512447][ T229] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 9.512667][ T229] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 9.512892][ T229] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 9.513077][ T229] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 9.513301][ T229] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 9.513519][ T229] ? 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) 
[ 9.513746][ T229] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 9.513971][ T229] ksys_write (fs/read_write.c:731) 
[ 9.514152][ T229] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 9.514372][ T229] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 9.514604][ T229] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.514834][ T229] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.515114][  T229] RIP: 0033:0x7f5af61c2b77
[ 9.515344][ T229] 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
[    9.516109][  T229] RSP: 002b:00007ffda3740348 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[    9.516446][  T229] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f5af61c2b77
[    9.516772][  T229] RDX: 0000000000000007 RSI: 0000564fc21434c0 RDI: 0000000000000001
[    9.517110][  T229] RBP: 0000564fc21434c0 R08: 0000000000000003 R09: 0000000000000077
[    9.517438][  T229] R10: 0000000000000063 R11: 0000000000000246 R12: 0000000000000007
[    9.517769][  T229] R13: 00007f5af627e760 R14: 0000000000000007 R15: 00007f5af62799c0
| [    9.753419][  T256] ------------[ cut here ]------------
| [ 9.753750][ T256] WARNING: CPU: 2 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) 
| [    9.754273][  T256] Modules linked in: netdevsim
| [    9.754890][  T256] Tainted: [W]=WARN
[    9.755094][  T256] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9.755357][ T256] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.755628][ 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
[    9.756355][  T256] RSP: 0018:ffffc900008371e8 EFLAGS: 00010246
[    9.756622][  T256] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[    9.756932][  T256] RDX: 0000000000000000 RSI: ffff88800ba22c98 RDI: ffff88800602adc0
[    9.757260][  T256] RBP: ffff888002488040 R08: 0000000000000000 R09: fffffbfff507d83c
[    9.757574][  T256] R10: ffffffffa83ec1e7 R11: ffff88800602a300 R12: 0000000000000000
[    9.757882][  T256] R13: ffff88800ba22128 R14: ffff88800ba22008 R15: ffff88800ba22000
[    9.758200][  T256] FS:  00007f59e5422800(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[    9.758560][  T256] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.758829][  T256] CR2: 00007f54e94c0a00 CR3: 0000000004eee003 CR4: 0000000000772ef0
[    9.759154][  T256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    9.759472][  T256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    9.759777][  T256] PKRU: 55555554
[    9.759943][  T256] Call Trace:
[    9.760125][  T256]  <TASK>
[ 9.760244][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.760463][ T256] ? __warn (kernel/panic.c:748) 
[ 9.760635][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.760874][ T256] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 9.761108][ T256] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 9.761273][ T256] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 9.761493][ T256] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 9.761726][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 9.761944][ T256] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 9.762193][ T256] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 9.762469][ 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) 
[ 9.762697][ T256] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 9.762916][ T256] register_netdevice (net/core/dev.c:11003) 
[ 9.763150][ T256] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 9.763376][ T256] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 9.763611][ T256] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 9.763887][ T256] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 9.764183][ T256] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 9.764464][ T256] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 9.764744][ T256] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 9.765020][ T256] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 9.765297][ T256] devlink_reload (net/devlink/dev.c:474) 
[ 9.765522][ T256] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 9.765735][ T256] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 9.765953][ T256] ? cap_capable (security/commoncap.c:131) 
[ 9.766177][ 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) 
[ 9.766358][ T256] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 9.766575][ T256] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 9.766840][ T256] ? __nla_parse (lib/nlattr.c:732) 
[ 9.767080][ T256] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 9.767298][ T256] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 9.767576][ T256] ? cap_capable (security/commoncap.c:131) 
[ 9.767795][ T256] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 9.768033][ T256] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 9.768276][ T256] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 9.768492][ T256] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 9.768750][ T256] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 9.769023][ T256] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 9.769296][ T256] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 9.769520][ T256] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 9.769732][ T256] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 9.769952][ T256] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 9.770188][ T256] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 9.770357][ T256] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 9.770572][ T256] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 9.770793][ T256] genl_rcv (net/netlink/genetlink.c:1220) 
[ 9.770962][ T256] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 9.771199][ T256] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 9.771433][ T256] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 9.771652][ T256] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 9.771873][ T256] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 9.772096][ T256] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 9.772321][ T256] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 9.772545][ T256] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 9.772764][ T256] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 9.772976][ T256] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 9.773204][ T256] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 9.773433][ T256] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 9.773661][ T256] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 9.773927][ T256] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 9.774154][ T256] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 9.774423][ T256] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 9.774647][ T256] __x64_sys_sendto (net/socket.c:2181) 
[ 9.774865][ T256] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 9.775135][ T256] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 9.775352][ T256] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[    9.775616][  T256] RIP: 0033:0x7f59e562ea4a
[ 9.775834][ 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
[    9.776550][  T256] RSP: 002b:00007fff639700d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[    9.776870][  T256] RAX: ffffffffffffffda RBX: 00000000172c7b00 RCX: 00007f59e562ea4a
[    9.777186][  T256] RDX: 0000000000000040 RSI: 00000000172c7b00 RDI: 0000000000000005
[    9.777495][  T256] RBP: 00000000172c7910 R08: 00007f59e57d2200 R09: 000000000000000c
[    9.777811][  T256] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200
[    9.778135][  T256] R13: 00000000172c7910 R14: 0000000000000000 R15: 0000000000000001
| [   35.962660][   T11] ------------[ cut here ]------------
| [ 35.962966][ T11] WARNING: CPU: 0 PID: 11 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) 
| [   35.963343][   T11] Modules linked in: netdevsim
| [   35.963890][   T11] Tainted: [W]=WARN
[   35.964132][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   35.964361][   T11] Workqueue: netns cleanup_net
[ 35.964573][ T11] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 35.964809][ T11] 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
[   35.965511][   T11] RSP: 0018:ffffc900000b7620 EFLAGS: 00010246
[   35.965724][   T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   35.965969][   T11] RDX: 0000000000000000 RSI: ffff8880024bac98 RDI: ffff888001a82e10
[   35.966342][   T11] RBP: ffffffffaa523440 R08: 0000000000000000 R09: fffffbfff507d83c
[   35.966614][   T11] R10: ffffffffa83ec1e7 R11: ffff888001a82300 R12: 0000000000000000
[   35.966879][   T11] R13: ffff8880024ba128 R14: ffff8880024ba008 R15: ffff8880024ba000
[   35.967243][   T11] FS:  0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   35.967553][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   35.967783][   T11] CR2: 0000564fc21434c0 CR3: 0000000004ee8004 CR4: 0000000000772ef0
[   35.968195][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   35.968463][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   35.968708][   T11] PKRU: 55555554
[   35.968834][   T11] Call Trace:
[   35.968960][   T11]  <TASK>
[ 35.969065][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 35.969253][ T11] ? __warn (kernel/panic.c:748) 
[ 35.969394][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 35.969563][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 35.969739][ T11] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 35.969871][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 35.970052][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 35.970247][ T11] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 35.970426][ T11] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 35.970652][ T11] ? _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) 
[ 35.970829][ T11] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 35.971042][ T11] register_netdevice (net/core/dev.c:11003) 
[ 35.971234][ T11] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 35.971427][ T11] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 35.971638][ T11] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 35.971864][ T11] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 35.972137][ T11] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 35.972374][ T11] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 35.972636][ T11] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 35.972866][ T11] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 35.973142][ T11] devlink_reload (net/devlink/dev.c:474) 
[ 35.973320][ T11] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 35.973529][ T11] ? devlinks_xa_find_get (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/devlink/core.c:343) 
[ 35.973720][ T11] devlink_pernet_pre_exit (net/devlink/core.c:288 net/devlink/devl_internal.h:114 net/devlink/core.c:513) 
[ 35.973896][ T11] ? __pfx_devlink_pernet_pre_exit (net/devlink/core.c:496) 
[ 35.974140][ T11] cleanup_net (net/core/net_namespace.c:162 net/core/net_namespace.c:632) 
[ 35.974343][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 35.974520][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:594) 
[ 35.974723][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 35.974899][ T11] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 35.975075][ T11] ? process_one_work (kernel/workqueue.c:3214) 
[ 35.975271][ T11] process_one_work (kernel/workqueue.c:3238) 
[ 35.975469][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 35.975684][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 35.975871][ T11] ? assign_work (kernel/workqueue.c:1200) 
[ 35.976110][ T11] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 35.976292][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 35.976472][ T11] kthread (kernel/kthread.c:464) 
[ 35.976631][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 35.976807][ T11] ? __pfx_kthread (kernel/kthread.c:413) 
[ 35.976980][ T11] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 35.977176][ T11] ? __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