======================================
| 0
| xx__-> [   12.658030][  T220] ------------[ cut here ]------------
| [ 12.658405][ T220] WARNING: CPU: 3 PID: 220 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) 
| [   12.658865][  T220] Modules linked in: netdevsim
[   12.659464][  T220] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 12.659746][ T220] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.660025][ T220] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 90 0c 00 00 be ff ff ff ff e8 08 e9 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 90 0c 00 00 	lea    0xc90(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 08 e9 78 00       	call   0x78e929
  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
[   12.660789][  T220] RSP: 0018:ffffc90000ac7548 EFLAGS: 00010246
[   12.661062][  T220] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   12.661404][  T220] RDX: 0000000000000000 RSI: ffff88800ba7ac90 RDI: ffff8880090fae38
[   12.661730][  T220] RBP: ffffffffa8928600 R08: 0000000000000000 R09: fffffbfff4cfd944
[   12.662045][  T220] R10: ffffffffa67eca27 R11: ffff8880090fa300 R12: 0000000000000000
[   12.662388][  T220] R13: ffff88800ba7a128 R14: ffff88800ba7a008 R15: ffff88800ba7a000
[   12.662716][  T220] FS:  00007f6e16baf1c0(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   12.663092][  T220] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   12.663379][  T220] CR2: 00007f6e096038b0 CR3: 00000000023b2001 CR4: 0000000000772ef0
[   12.663711][  T220] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   12.664035][  T220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   12.664374][  T220] PKRU: 55555554
[   12.664543][  T220] Call Trace:
[   12.664820][  T220]  <TASK>
[ 12.664934][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.665173][ T220] ? __warn (kernel/panic.c:748) 
[ 12.665341][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.665556][ T220] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 12.665792][ T220] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 12.665983][ T220] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 12.666215][ T220] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 12.666476][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 12.666695][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 12.666993][ T220] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 12.667360][ T220] ? _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) 
[ 12.667586][ T220] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 12.667809][ T220] register_netdevice (net/core/dev.c:11003) 
[ 12.668076][ T220] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 12.668434][ T220] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 12.668717][ T220] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 12.669003][ T220] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 12.669297][ T220] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 12.669581][ T220] nsim_drv_probe (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 12.669818][ T220] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 12.670088][ T220] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 12.670317][ T220] ? 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)) 
[ 12.670481][ T220] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 12.670701][ T220] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 12.670921][ T220] __driver_probe_device (drivers/base/dd.c:800) 
[ 12.671143][ T220] driver_probe_device (drivers/base/dd.c:830) 
[ 12.671372][ T220] __device_attach_driver (drivers/base/dd.c:959) 
[ 12.671591][ T220] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 12.671856][ T220] bus_for_each_drv (drivers/base/bus.c:462) 
[ 12.672071][ T220] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 12.672293][ T220] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 12.672505][ T220] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 12.672717][ T220] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 12.672941][ T220] __device_attach (drivers/base/dd.c:1030) 
[ 12.673165][ T220] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 12.673377][ T220] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 12.673590][ T220] ? 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) 
[ 12.673814][ T220] bus_probe_device (drivers/base/bus.c:537) 
[ 12.674030][ T220] device_add (drivers/base/core.c:3672) 
[ 12.674253][ T220] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 12.674468][ T220] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 12.674687][ T220] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 12.674961][ T220] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 12.675245][ T220] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 12.675455][ T220] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 12.675675][ T220] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 12.675888][ T220] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 12.676122][ T220] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 12.676292][ T220] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 12.676510][ T220] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 12.676721][ T220] ? 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) 
[ 12.676944][ T220] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 12.677177][ T220] ksys_write (fs/read_write.c:731) 
[ 12.677342][ T220] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 12.677559][ T220] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 12.677785][ T220] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 12.678002][ T220] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   12.678273][  T220] RIP: 0033:0x7f6e16dc9b77
[ 12.678512][ T220] 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
[   12.679289][  T220] RSP: 002b:00007ffed74e0bc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   12.679618][  T220] RAX: ffffffffffffffda RBX: 00007f6e16baf140 RCX: 00007f6e16dc9b77
[   12.679943][  T220] RDX: 0000000000000009 RSI: 000055835e9c0f80 RDI: 0000000000000005
[   12.680284][  T220] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[   12.680616][  T220] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f6e08ac3400
[   12.680938][  T220] R13: 000055835e9c0f80 R14: 0000000000000005 R15: 000055835e717980
| [   13.560934][  T220] ------------[ cut here ]------------
| [ 13.561365][ T220] WARNING: CPU: 0 PID: 220 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) 
| [   13.561770][  T220] Modules linked in: netdevsim
| [   13.562338][  T220] Tainted: [W]=WARN
[   13.562510][  T220] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.562759][ T220] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.563009][ T220] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 90 0c 00 00 be ff ff ff ff e8 08 e9 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 90 0c 00 00 	lea    0xc90(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 08 e9 78 00       	call   0x78e929
  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
[   13.563705][  T220] RSP: 0018:ffffc90000ac7548 EFLAGS: 00010246
[   13.563954][  T220] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   13.564254][  T220] RDX: 0000000000000000 RSI: ffff888005082c90 RDI: ffff8880090fae38
[   13.564548][  T220] RBP: ffffffffa8928600 R08: 0000000000000000 R09: fffffbfff4cfd944
[   13.564843][  T220] R10: ffffffffa67eca27 R11: ffff8880090fa300 R12: 0000000000000000
[   13.565140][  T220] R13: ffff888005082128 R14: ffff888005082008 R15: ffff888005082000
[   13.565436][  T220] FS:  00007f6e16baf1c0(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[   13.565776][  T220] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   13.566026][  T220] CR2: 00007f6e0957c7c0 CR3: 00000000023b2001 CR4: 0000000000772ef0
[   13.566374][  T220] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   13.566670][  T220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   13.566965][  T220] PKRU: 55555554
[   13.567126][  T220] Call Trace:
[   13.567275][  T220]  <TASK>
[ 13.567376][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.567574][ T220] ? __warn (kernel/panic.c:748) 
[ 13.567729][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.567927][ T220] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 13.568141][ T220] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 13.568294][ T220] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 13.568491][ T220] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 13.568707][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.568909][ T220] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 13.569129][ T220] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 13.569383][ T220] ? _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) 
[ 13.569587][ T220] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 13.569793][ T220] register_netdevice (net/core/dev.c:11003) 
[ 13.569995][ T220] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 13.570214][ T220] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 13.570430][ T220] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 13.570690][ T220] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 13.570954][ T220] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 13.571231][ T220] nsim_drv_probe (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 13.571448][ T220] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 13.571728][ T220] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 13.571931][ T220] ? 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)) 
[ 13.572083][ T220] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 13.572297][ T220] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 13.572500][ T220] __driver_probe_device (drivers/base/dd.c:800) 
[ 13.572699][ T220] driver_probe_device (drivers/base/dd.c:830) 
[ 13.572894][ T220] __device_attach_driver (drivers/base/dd.c:959) 
[ 13.573097][ T220] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 13.573348][ T220] bus_for_each_drv (drivers/base/bus.c:462) 
[ 13.573552][ T220] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 13.573749][ T220] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 13.573947][ T220] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 13.574154][ T220] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 13.574358][ T220] __device_attach (drivers/base/dd.c:1030) 
[ 13.574558][ T220] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 13.574754][ T220] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 13.574959][ T220] ? 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) 
[ 13.575177][ T220] bus_probe_device (drivers/base/bus.c:537) 
[ 13.575384][ T220] device_add (drivers/base/core.c:3672) 
[ 13.575586][ T220] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 13.575782][ T220] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 13.575988][ T220] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 13.576257][ T220] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 13.576516][ T220] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 13.576711][ T220] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 13.576912][ T220] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 13.577107][ T220] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 13.577321][ T220] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 13.577482][ T220] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 13.577685][ T220] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 13.577879][ T220] ? 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) 
[ 13.578087][ T220] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 13.578300][ T220] ksys_write (fs/read_write.c:731) 
[ 13.578451][ T220] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 13.578656][ T220] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 13.578864][ T220] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 13.579065][ T220] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   13.579320][  T220] RIP: 0033:0x7f6e16dc9b77
[ 13.579526][ T220] 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
[   13.580215][  T220] RSP: 002b:00007ffed74e0b88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   13.580515][  T220] RAX: ffffffffffffffda RBX: 00007f6e16baf140 RCX: 00007f6e16dc9b77
[   13.580810][  T220] RDX: 0000000000000007 RSI: 000055835e9c0f80 RDI: 0000000000000005
[   13.581099][  T220] RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000
[   13.581402][  T220] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f6e08ac3400
[   13.581698][  T220] R13: 000055835e9c0f80 R14: 0000000000000005 R15: 000055835e717980
| [   13.984859][  T235] ------------[ cut here ]------------
| [ 13.985295][ T235] WARNING: CPU: 3 PID: 235 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) 
| [   13.985682][  T235] Modules linked in: netdevsim
| [   13.986397][  T235] Tainted: [W]=WARN
[   13.986549][  T235] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.986785][ T235] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.987025][ T235] Code: 00 e8 a3 4a fe ff 48 8b 5c 24 58 e9 87 fb ff ff 49 8d bf 90 0c 00 00 be ff ff ff ff e8 08 e9 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 90 0c 00 00 	lea    0xc90(%r15),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 08 e9 78 00       	call   0x78e929
  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
[   13.988012][  T235] RSP: 0018:ffffc900004f71f0 EFLAGS: 00010246
[   13.988414][  T235] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[   13.988895][  T235] RDX: 0000000000000000 RSI: ffff88800b8eac90 RDI: ffff888005478b00
[   13.989380][  T235] RBP: ffff88800b140040 R08: 0000000000000000 R09: fffffbfff4cfd944
[   13.989848][  T235] R10: ffffffffa67eca27 R11: ffff888005478040 R12: 0000000000000000
[   13.990337][  T235] R13: ffff88800b8ea128 R14: ffff88800b8ea008 R15: ffff88800b8ea000
[   13.990792][  T235] FS:  00007f5cf554a800(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   13.991327][  T235] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   13.991710][  T235] CR2: 00007f5cf5689440 CR3: 000000000b2ae004 CR4: 0000000000772ef0
[   13.992183][  T235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   13.992632][  T235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   13.993075][  T235] PKRU: 55555554
[   13.993320][  T235] Call Trace:
[   13.993539][  T235]  <TASK>
[ 13.993722][ T235] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.994014][ T235] ? __warn (kernel/panic.c:748) 
[ 13.994297][ T235] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.994534][ T235] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 13.994729][ T235] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 13.994875][ T235] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 13.995067][ T235] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 13.995280][ T235] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 13.995487][ T235] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 13.995727][ T235] ? _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) 
[ 13.995920][ T235] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 13.996153][ T235] register_netdevice (net/core/dev.c:11003) 
[ 13.996351][ T235] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 13.996550][ T235] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 13.996761][ T235] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 13.997019][ T235] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 13.997310][ T235] ? nsim_dev_hwstats_init (./include/linux/workqueue.h:817 drivers/net/netdevsim/hwstats.c:442) netdevsim 
[ 13.997558][ T235] nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1450 drivers/net/netdevsim/dev.c:1501) netdevsim 
[ 13.997800][ T235] ? __pfx_nsim_dev_reload_create (drivers/net/netdevsim/dev.c:1462) netdevsim 
[ 13.998048][ T235] ? devlink_params_driverinit_load_new (net/devlink/param.c:833 (discriminator 2)) 
[ 13.998323][ T235] devlink_reload (net/devlink/dev.c:474) 
[ 13.998537][ T235] ? __pfx_devlink_reload (net/devlink/dev.c:446) 
[ 13.998727][ T235] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 13.998921][ T235] ? cap_capable (security/commoncap.c:131) 
[ 13.999129][ T235] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1146 fs/file.c:1160) 
[ 13.999284][ T235] devlink_nl_reload_doit (net/devlink/dev.c:584) 
[ 13.999479][ T235] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 13.999714][ T235] ? __nla_parse (lib/nlattr.c:732) 
[ 13.999917][ T235] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 14.000143][ T235] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 14.000395][ T235] ? cap_capable (security/commoncap.c:131) 
[ 14.000583][ T235] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 14.000779][ T235] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 14.000993][ T235] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 14.001201][ T235] ? __pfx_devlink_nl_pre_doit_dev_lock (net/devlink/netlink.c:257) 
[ 14.001435][ T235] ? __pfx_devlink_nl_reload_doit (net/devlink/dev.c:520) 
[ 14.001736][ T235] ? __pfx_devlink_nl_post_doit_dev_lock (net/devlink/netlink.c:288) 
[ 14.002111][ T235] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 14.002445][ T235] netlink_rcv_skb (net/netlink/af_netlink.c:2534) 
[ 14.002744][ T235] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 14.003058][ T235] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2511) 
[ 14.003416][ T235] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 14.003652][ T235] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 14.003963][ T235] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 14.004303][ T235] genl_rcv (net/netlink/genetlink.c:1220) 
[ 14.004535][ T235] netlink_unicast (net/netlink/af_netlink.c:1313 net/netlink/af_netlink.c:1339) 
[ 14.004849][ T235] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1324) 
[ 14.005183][ T235] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 14.005485][ T235] netlink_sendmsg (net/netlink/af_netlink.c:1883) 
[ 14.005774][ T235] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1802) 
[ 14.006081][ T235] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 14.006431][ T235] ? __might_fault (mm/memory.c:6851 mm/memory.c:6844) 
[ 14.006752][ T235] __sys_sendto (net/socket.c:709 net/socket.c:724 net/socket.c:2178) 
[ 14.007058][ T235] ? __pfx___sys_sendto (net/socket.c:2145) 
[ 14.007374][ T235] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 14.007680][ T235] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[ 14.007993][ T235] ? rseq_update_cpu_node_id (kernel/rseq.c:188 (discriminator 10)) 
[ 14.008305][ T235] ? __rseq_handle_notify_resume (kernel/rseq.c:420) 
[ 14.008687][ T235] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:403) 
[ 14.009077][ T235] ? __pfx___x64_sys_openat (fs/open.c:1454) 
[ 14.009327][ T235] __x64_sys_sendto (net/socket.c:2181) 
[ 14.009529][ T235] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 14.009763][ T235] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 14.009961][ T235] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   14.010224][  T235] RIP: 0033:0x7f5cf5756a4a
[ 14.010421][ T235] 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
[   14.011101][  T235] RSP: 002b:00007ffe62374838 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   14.011392][  T235] RAX: ffffffffffffffda RBX: 000000001373fb00 RCX: 00007f5cf5756a4a
[   14.011669][  T235] RDX: 0000000000000040 RSI: 000000001373fb00 RDI: 0000000000000003
[   14.011944][  T235] RBP: 000000001373f910 R08: 00007f5cf58fa200 R09: 000000000000000c
[   14.012246][  T235] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f200


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