======================================
| 0
| xx__-> [  281.207421][ T4000] ------------[ cut here ]------------
| [ 281.207834][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  281.208266][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
[  281.209603][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 281.209871][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 281.210146][ T4000] 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
[  281.210856][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  281.211130][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  281.211442][ T4000] RDX: 0000000000000000 RSI: ffff88800e34acd0 RDI: ffff88800f8a2e38
[  281.211749][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  281.212073][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  281.212382][ T4000] R13: ffff88800e34a130 R14: ffff88800e34a008 R15: ffff88800e34a000
[  281.212696][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  281.213067][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  281.213328][ T4000] CR2: 000055a1a371ba91 CR3: 00000000107fe004 CR4: 0000000000772ef0
[  281.213636][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  281.213954][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  281.214261][ T4000] PKRU: 55555554
[  281.214420][ T4000] Call Trace:
[  281.214579][ T4000]  <TASK>
[ 281.214689][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 281.214898][ T4000] ? __warn (kernel/panic.c:748) 
[ 281.215066][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 281.215274][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 281.215488][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 281.215645][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 281.215850][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 281.216081][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 281.216288][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 281.216498][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 281.216759][ T4000] ? _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) 
[ 281.216982][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 281.217194][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 281.217410][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 281.217615][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 281.217832][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 281.218061][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 281.218330][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 281.218488][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 281.218756][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 281.219029][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 281.219294][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 281.219511][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 281.219775][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 281.219993][ T4000] ? 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)) 
[ 281.220150][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 281.220364][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 281.220576][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 281.220785][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 281.220997][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 281.221211][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 281.221470][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 281.221676][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 281.221881][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 281.222101][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 281.222306][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 281.222520][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 281.222729][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 281.222943][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 281.223150][ T4000] ? 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) 
[ 281.223364][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 281.223574][ T4000] device_add (drivers/base/core.c:3672) 
[ 281.223783][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 281.223993][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 281.224211][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 281.224480][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 281.224745][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 281.224955][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 281.225168][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 281.225369][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 281.225580][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 281.225748][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 281.225973][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 281.226176][ T4000] ? 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) 
[ 281.226388][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 281.226600][ T4000] ksys_write (fs/read_write.c:731) 
[ 281.226767][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 281.226978][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 281.227193][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 281.227407][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  281.227661][ T4000] RIP: 0033:0x7f35e4741b77
[ 281.227876][ T4000] 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
[  281.228589][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  281.228904][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  281.229220][ T4000] RDX: 0000000000000009 RSI: 0000563c926987d0 RDI: 0000000000000005
[  281.229527][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  281.229834][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4700
[  281.230152][ T4000] R13: 0000563c926987d0 R14: 0000000000000005 R15: 0000563c921ce910
| [  292.613769][ T4000] ------------[ cut here ]------------
| [ 292.614212][ T4000] WARNING: CPU: 2 PID: 4000 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) 
| [  292.614646][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  292.616011][ T4000] Tainted: [W]=WARN
[  292.616234][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 292.616510][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 292.616789][ T4000] 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
[  292.617535][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  292.617808][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  292.618133][ T4000] RDX: 0000000000000000 RSI: ffff8880051a2cd0 RDI: ffff88800f8a2e38
[  292.618451][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  292.618769][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  292.619096][ T4000] R13: ffff8880051a2130 R14: ffff8880051a2008 R15: ffff8880051a2000
[  292.619591][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  292.619974][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  292.620242][ T4000] CR2: 00007f35d637f000 CR3: 00000000107fe002 CR4: 0000000000772ef0
[  292.620557][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  292.620873][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  292.621203][ T4000] PKRU: 55555554
[  292.621374][ T4000] Call Trace:
[  292.621544][ T4000]  <TASK>
[ 292.621667][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 292.621914][ T4000] ? __warn (kernel/panic.c:748) 
[ 292.622099][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 292.622325][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 292.622547][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 292.622720][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 292.622953][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 292.623189][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 292.623409][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 292.623633][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 292.623943][ T4000] ? _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) 
[ 292.624172][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 292.624396][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 292.624619][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 292.624837][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 292.625079][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 292.625314][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 292.625594][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 292.625769][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 292.626060][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 292.626340][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 292.626625][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 292.626857][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 292.627143][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 292.627365][ T4000] ? 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)) 
[ 292.627534][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 292.627762][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 292.627995][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 292.628219][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 292.628438][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 292.628664][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 292.628949][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 292.629172][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 292.629387][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 292.629604][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 292.629821][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 292.630054][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 292.630281][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 292.630496][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 292.630715][ T4000] ? 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) 
[ 292.630950][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 292.631175][ T4000] device_add (drivers/base/core.c:3672) 
[ 292.631396][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 292.631614][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 292.631857][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 292.632151][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 292.632432][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 292.632653][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 292.632876][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 292.633104][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 292.633328][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 292.633510][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 292.633734][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 292.633959][ T4000] ? 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) 
[ 292.634187][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 292.634412][ T4000] ksys_write (fs/read_write.c:731) 
[ 292.634584][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 292.634799][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 292.635044][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 292.635266][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  292.635532][ T4000] RIP: 0033:0x7f35e4741b77
[ 292.635755][ T4000] 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
[  292.636481][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  292.636806][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  292.637132][ T4000] RDX: 0000000000000009 RSI: 0000563c926987d0 RDI: 0000000000000005
[  292.637448][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  292.637761][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4700
[  292.638088][ T4000] R13: 0000563c926987d0 R14: 0000000000000005 R15: 0000563c921ce910
| [  330.570685][ T4000] ------------[ cut here ]------------
| [ 330.571050][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  330.571464][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  330.572740][ T4000] Tainted: [W]=WARN
[  330.572910][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 330.573178][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 330.573488][ T4000] 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
[  330.574363][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  330.574621][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  330.574949][ T4000] RDX: 0000000000000000 RSI: ffff88801db0acd0 RDI: ffff88800f8a2e38
[  330.575270][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  330.575572][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  330.575883][ T4000] R13: ffff88801db0a130 R14: ffff88801db0a008 R15: ffff88801db0a000
[  330.576196][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  330.576558][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  330.576814][ T4000] CR2: 00007f35d6ef4810 CR3: 00000000107fe001 CR4: 0000000000772ef0
[  330.577128][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  330.577432][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  330.577739][ T4000] PKRU: 55555554
[  330.577896][ T4000] Call Trace:
[  330.578058][ T4000]  <TASK>
[ 330.578165][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 330.578372][ T4000] ? __warn (kernel/panic.c:748) 
[ 330.578531][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 330.578737][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 330.578956][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 330.579119][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 330.579326][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 330.579547][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 330.579761][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 330.580005][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 330.580288][ T4000] ? _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) 
[ 330.580514][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 330.580745][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 330.580981][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 330.581199][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 330.581432][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 330.581676][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 330.581969][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 330.582141][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 330.582435][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 330.582720][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 330.583021][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 330.583241][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 330.583502][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 330.583711][ T4000] ? 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)) 
[ 330.583876][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 330.584107][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 330.584320][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 330.584527][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 330.584732][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 330.584949][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 330.585201][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 330.585412][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 330.585615][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 330.585821][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 330.586034][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 330.586245][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 330.586450][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 330.586652][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 330.586865][ T4000] ? 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) 
[ 330.587087][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 330.587297][ T4000] device_add (drivers/base/core.c:3672) 
[ 330.587512][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 330.587718][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 330.587949][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 330.588221][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 330.588492][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 330.588696][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 330.588908][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 330.589121][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 330.589333][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 330.589500][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 330.589710][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 330.589935][ T4000] ? 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) 
[ 330.590149][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 330.590383][ T4000] ksys_write (fs/read_write.c:731) 
[ 330.590540][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 330.590745][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 330.590973][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 330.591183][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  330.591442][ T4000] RIP: 0033:0x7f35e4741b77
[ 330.591656][ T4000] 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
[  330.592385][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  330.592693][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  330.593014][ T4000] RDX: 0000000000000009 RSI: 0000563c9269eb80 RDI: 0000000000000005
[  330.593319][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  330.593621][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4700
[  330.593937][ T4000] R13: 0000563c9269eb80 R14: 0000000000000005 R15: 0000563c921ce910
| [  342.405773][ T4000] ------------[ cut here ]------------
| [ 342.406185][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  342.406594][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  342.407952][ T4000] Tainted: [W]=WARN
[  342.408111][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 342.408369][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 342.408631][ T4000] 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
[  342.409363][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  342.409630][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  342.409952][ T4000] RDX: 0000000000000000 RSI: ffff88800e34acd0 RDI: ffff88800f8a2e38
[  342.410259][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  342.410563][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  342.410869][ T4000] R13: ffff88800e34a130 R14: ffff88800e34a008 R15: ffff88800e34a000
[  342.411185][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  342.411553][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  342.411823][ T4000] CR2: 00007f35d6ef4810 CR3: 00000000107fe003 CR4: 0000000000772ef0
[  342.412142][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  342.412450][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  342.412906][ T4000] PKRU: 55555554
[  342.413079][ T4000] Call Trace:
[  342.413236][ T4000]  <TASK>
[ 342.413346][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 342.413553][ T4000] ? __warn (kernel/panic.c:748) 
[ 342.413712][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 342.413935][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 342.414159][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 342.414319][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 342.414524][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 342.414745][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 342.414963][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 342.415174][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 342.415434][ T4000] ? _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) 
[ 342.415655][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 342.415893][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 342.416116][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 342.416320][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 342.416543][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 342.416762][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 342.417034][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 342.417195][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 342.417469][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 342.417732][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 342.418016][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 342.418235][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 342.418494][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 342.418703][ T4000] ? 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)) 
[ 342.418864][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 342.419091][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 342.419304][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 342.419514][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 342.419721][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 342.419940][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 342.420194][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 342.420405][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 342.420609][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 342.420813][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 342.421030][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 342.421242][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 342.421447][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 342.421663][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 342.421873][ T4000] ? 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) 
[ 342.422096][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 342.422305][ T4000] device_add (drivers/base/core.c:3672) 
[ 342.422514][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 342.422720][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 342.422947][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 342.423215][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 342.423486][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 342.423690][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 342.423901][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 342.424115][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 342.424325][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 342.424488][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 342.424699][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 342.424907][ T4000] ? 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) 
[ 342.425131][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 342.425344][ T4000] ksys_write (fs/read_write.c:731) 
[ 342.425502][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 342.425706][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 342.425931][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 342.426142][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  342.426396][ T4000] RIP: 0033:0x7f35e4741b77
[ 342.426620][ T4000] 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
[  342.427342][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  342.427651][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  342.427969][ T4000] RDX: 0000000000000009 RSI: 0000563c9269e910 RDI: 0000000000000005
[  342.428270][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  342.428571][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4700
[  342.428871][ T4000] R13: 0000563c9269e910 R14: 0000000000000005 R15: 0000563c921ce910
| [  372.069286][ T4000] ------------[ cut here ]------------
| [ 372.069621][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  372.070113][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  372.071374][ T4000] Tainted: [W]=WARN
[  372.071539][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 372.071795][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 372.072073][ T4000] 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
[  372.072786][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  372.073055][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  372.073364][ T4000] RDX: 0000000000000000 RSI: ffff88800e442cd0 RDI: ffff88800f8a2e38
[  372.073833][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  372.074152][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  372.074462][ T4000] R13: ffff88800e442130 R14: ffff88800e442008 R15: ffff88800e442000
[  372.074770][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  372.075144][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  372.075402][ T4000] CR2: 00007f35d6f87f30 CR3: 00000000107fe006 CR4: 0000000000772ef0
[  372.075712][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  372.076042][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  372.076349][ T4000] PKRU: 55555554
[  372.076507][ T4000] Call Trace:
[  372.076669][ T4000]  <TASK>
[ 372.076778][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 372.076998][ T4000] ? __warn (kernel/panic.c:748) 
[ 372.077160][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 372.077369][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 372.077583][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 372.077743][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 372.077968][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 372.078202][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 372.078416][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 372.078633][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 372.078908][ T4000] ? _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) 
[ 372.079136][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 372.079348][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 372.079586][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 372.079792][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 372.080023][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 372.080244][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 372.080510][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 372.080672][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 372.080970][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 372.081247][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 372.081519][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 372.081738][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 372.082016][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 372.082227][ T4000] ? 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)) 
[ 372.082389][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 372.082633][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 372.082854][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 372.083075][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 372.083286][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 372.083496][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 372.083754][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 372.083972][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 372.084182][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 372.084387][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 372.084598][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 372.084810][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 372.085029][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 372.085235][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 372.085445][ T4000] ? 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) 
[ 372.085661][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 372.085871][ T4000] device_add (drivers/base/core.c:3672) 
[ 372.086092][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 372.086316][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 372.086539][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 372.086816][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 372.087099][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 372.087311][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 372.087526][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 372.087731][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 372.087952][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 372.088121][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 372.088326][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 372.088549][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 372.088822][ T4000] ksys_write (fs/read_write.c:731) 
[ 372.088999][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 372.089208][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 372.089424][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 372.089633][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  372.089889][ T4000] RIP: 0033:0x7f35e4741b77
[ 372.090112][ T4000] 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
[  372.091292][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  372.091610][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  372.091915][ T4000] RDX: 0000000000000009 RSI: 0000563c926a1d50 RDI: 0000000000000005
[  372.092503][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  372.092811][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4700
[  372.093128][ T4000] R13: 0000563c926a1d50 R14: 0000000000000005 R15: 0000563c921ce910
| [  387.821057][ T4000] ------------[ cut here ]------------
| [ 387.821390][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  387.821811][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  387.823290][ T4000] Tainted: [W]=WARN
[  387.823454][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 387.823719][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 387.824207][ T4000] 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
[  387.825033][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  387.825320][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  387.825629][ T4000] RDX: 0000000000000000 RSI: ffff88800a9cacd0 RDI: ffff88800f8a2e38
[  387.826037][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  387.826348][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  387.826662][ T4000] R13: ffff88800a9ca130 R14: ffff88800a9ca008 R15: ffff88800a9ca000
[  387.827065][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  387.827424][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  387.827682][ T4000] CR2: 00007f35d6f65d60 CR3: 00000000107fe004 CR4: 0000000000772ef0
[  387.828165][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  387.828480][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  387.828787][ T4000] PKRU: 55555554
[  387.829100][ T4000] Call Trace:
[  387.829261][ T4000]  <TASK>
[ 387.829368][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 387.829579][ T4000] ? __warn (kernel/panic.c:748) 
[ 387.829739][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 387.830117][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 387.830335][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 387.830499][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 387.830725][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 387.831125][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 387.831348][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 387.831566][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 387.831861][ T4000] ? _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) 
[ 387.832242][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 387.832470][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 387.832703][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 387.833082][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 387.833326][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 387.833568][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 387.833854][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 387.834188][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 387.834469][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 387.834738][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 387.835128][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 387.835359][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 387.835624][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 387.835849][ T4000] ? 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)) 
[ 387.836131][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 387.836369][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 387.836601][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 387.836829][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 387.837166][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 387.837396][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 387.837671][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 387.837899][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 387.838154][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 387.838378][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 387.838601][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 387.838835][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 387.839068][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 387.839291][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 387.839517][ T4000] ? 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) 
[ 387.839748][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 387.839986][ T4000] device_add (drivers/base/core.c:3672) 
[ 387.840221][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 387.840450][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 387.840685][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 387.840987][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 387.841277][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 387.841506][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 387.841733][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 387.841967][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 387.842200][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 387.842376][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 387.842595][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 387.842836][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 387.843132][ T4000] ksys_write (fs/read_write.c:731) 
[ 387.843304][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 387.843525][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 387.843762][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 387.844001][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  387.844282][ T4000] RIP: 0033:0x7f35e4741b77
[ 387.844510][ T4000] 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
[  387.845279][ T4000] RSP: 002b:00007ffd69bb9158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  387.845608][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  387.845949][ T4000] RDX: 0000000000000009 RSI: 0000563c926a1d50 RDI: 0000000000000005
[  387.846277][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  387.846605][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  387.846943][ T4000] R13: 0000563c926a1d50 R14: 0000000000000005 R15: 0000563c921ce910
| [  400.667081][ T4000] ------------[ cut here ]------------
| [ 400.667438][ T4000] WARNING: CPU: 0 PID: 4000 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) 
| [  400.667896][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  400.669363][ T4000] Tainted: [W]=WARN
[  400.669533][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 400.669806][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 400.670136][ T4000] 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
[  400.670899][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  400.671190][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  400.671541][ T4000] RDX: 0000000000000000 RSI: ffff88801c61acd0 RDI: ffff88800f8a2e38
[  400.671870][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  400.672213][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  400.672541][ T4000] R13: ffff88801c61a130 R14: ffff88801c61a008 R15: ffff88801c61a000
[  400.672867][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[  400.673258][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  400.673665][ T4000] CR2: 00007f35d6f65d60 CR3: 00000000107fe006 CR4: 0000000000772ef0
[  400.674007][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  400.674318][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  400.674621][ T4000] PKRU: 55555554
[  400.674781][ T4000] Call Trace:
[  400.674953][ T4000]  <TASK>
[ 400.675060][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 400.675268][ T4000] ? __warn (kernel/panic.c:748) 
[ 400.675428][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 400.675635][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 400.675850][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 400.676020][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 400.676230][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 400.676456][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 400.676663][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 400.676883][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 400.677164][ T4000] ? _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) 
[ 400.677375][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 400.677587][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 400.677799][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 400.678019][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 400.678238][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 400.678459][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 400.678725][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 400.679007][ T4000] ? queue_delayed_work_on (kernel/workqueue.c:2565 (discriminator 1)) 
[ 400.679213][ T4000] ? queue_delayed_work_on (kernel/workqueue.c:2567) 
[ 400.679430][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 400.679697][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 400.679927][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 400.680189][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 400.680395][ T4000] ? 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)) 
[ 400.680553][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 400.680772][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 400.681000][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 400.681209][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 400.681425][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 400.681635][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 400.681890][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 400.682108][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 400.682322][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 400.682528][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 400.682734][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 400.682957][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 400.683167][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 400.683371][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 400.683578][ T4000] ? 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) 
[ 400.683801][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 400.684022][ T4000] device_add (drivers/base/core.c:3672) 
[ 400.684232][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 400.684436][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 400.684653][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 400.684936][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 400.685203][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 400.685412][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 400.685623][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 400.685833][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 400.686066][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 400.686230][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 400.686433][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 400.686653][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 400.686939][ T4000] ksys_write (fs/read_write.c:731) 
[ 400.687100][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 400.687307][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 400.687522][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 400.687732][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  400.687995][ T4000] RIP: 0033:0x7f35e4741b77
[ 400.688208][ T4000] 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
[  400.688927][ T4000] RSP: 002b:00007ffd69bb9158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  400.689236][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  400.689537][ T4000] RDX: 0000000000000007 RSI: 0000563c926a1d50 RDI: 0000000000000005
[  400.689842][ T4000] RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000
[  400.690156][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  400.690459][ T4000] R13: 0000563c926a1d50 R14: 0000000000000005 R15: 0000563c921ce910
| [  413.542800][ T4000] ------------[ cut here ]------------
| [ 413.543304][ T4000] WARNING: CPU: 1 PID: 4000 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) 
| [  413.543716][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  413.545281][ T4000] Tainted: [W]=WARN
[  413.545443][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 413.545698][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 413.546058][ T4000] 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
[  413.546766][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  413.547122][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  413.547451][ T4000] RDX: 0000000000000000 RSI: ffff8880051a2cd0 RDI: ffff88800f8a2e38
[  413.547754][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  413.548100][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  413.548406][ T4000] R13: ffff8880051a2130 R14: ffff8880051a2008 R15: ffff8880051a2000
[  413.548714][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
[  413.549082][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  413.549338][ T4000] CR2: 00007f35d6f65d60 CR3: 00000000107fe005 CR4: 0000000000772ef0
[  413.549643][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  413.549960][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  413.550263][ T4000] PKRU: 55555554
[  413.550419][ T4000] Call Trace:
[  413.550573][ T4000]  <TASK>
[ 413.550679][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 413.550886][ T4000] ? __warn (kernel/panic.c:748) 
[ 413.551056][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 413.551278][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 413.551489][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 413.551646][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 413.551850][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 413.552080][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 413.552288][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 413.552499][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 413.552759][ T4000] ? _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) 
[ 413.552989][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 413.553203][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 413.553412][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 413.553615][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 413.553837][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 413.554069][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 413.554336][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 413.554495][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 413.554765][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 413.555039][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 413.555302][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 413.555520][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 413.555783][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 413.555998][ T4000] ? 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)) 
[ 413.556155][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 413.556371][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 413.556582][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 413.556791][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 413.557012][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 413.557227][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 413.557479][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 413.557686][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 413.557889][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 413.558103][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 413.558307][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 413.558520][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 413.558730][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 413.558943][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 413.559149][ T4000] ? 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) 
[ 413.559361][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 413.559568][ T4000] device_add (drivers/base/core.c:3672) 
[ 413.559778][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 413.559992][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 413.560214][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 413.560482][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 413.560753][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 413.560969][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 413.561189][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 413.561397][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 413.561607][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 413.561777][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 413.561993][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 413.562217][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 413.562485][ T4000] ksys_write (fs/read_write.c:731) 
[ 413.562645][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 413.562852][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 413.563079][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 413.563287][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  413.563543][ T4000] RIP: 0033:0x7f35e4741b77
[ 413.563753][ T4000] 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
[  413.564467][ T4000] RSP: 002b:00007ffd69bb9158 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  413.564777][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  413.565096][ T4000] RDX: 0000000000000009 RSI: 0000563c926a1d50 RDI: 0000000000000005
[  413.565417][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  413.565717][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  413.566036][ T4000] R13: 0000563c926a1d50 R14: 0000000000000005 R15: 0000563c921ce910
| [  437.875654][ T4000] ------------[ cut here ]------------
| [ 437.876128][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  437.876542][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  437.877775][ T4000] Tainted: [W]=WARN
[  437.877941][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 437.878196][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 437.878457][ T4000] 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
[  437.879179][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  437.879601][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  437.879911][ T4000] RDX: 0000000000000000 RSI: ffff888010002cd0 RDI: ffff88800f8a2e38
[  437.880233][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  437.880539][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  437.880872][ T4000] R13: ffff888010002130 R14: ffff888010002008 R15: ffff888010002000
[  437.881192][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  437.881546][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  437.881802][ T4000] CR2: 00007f35d6ef4810 CR3: 00000000107fe005 CR4: 0000000000772ef0
[  437.882119][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  437.882425][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  437.882726][ T4000] PKRU: 55555554
[  437.882881][ T4000] Call Trace:
[  437.883045][ T4000]  <TASK>
[ 437.883151][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 437.883358][ T4000] ? __warn (kernel/panic.c:748) 
[ 437.883517][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 437.883728][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 437.883947][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 437.884104][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 437.884313][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 437.884533][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 437.884738][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 437.884959][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 437.885225][ T4000] ? _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) 
[ 437.885436][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 437.885647][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 437.885857][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 437.886069][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 437.886288][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 437.886531][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 437.886794][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 437.886965][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 437.887236][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 437.887500][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 437.887763][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 437.887995][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 437.888257][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 437.888465][ T4000] ? 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)) 
[ 437.888620][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 437.888836][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 437.889058][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 437.889271][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 437.889482][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 437.889692][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 437.889956][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 437.890164][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 437.890368][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 437.890574][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 437.890779][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 437.891002][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 437.891216][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 437.891421][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 437.891627][ T4000] ? 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) 
[ 437.891840][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 437.892059][ T4000] device_add (drivers/base/core.c:3672) 
[ 437.892270][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 437.892473][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 437.892695][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 437.892971][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 437.893241][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 437.893444][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 437.893654][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 437.893857][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 437.894083][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 437.894249][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 437.894460][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 437.894663][ T4000] ? 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) 
[ 437.894878][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 437.895099][ T4000] ksys_write (fs/read_write.c:731) 
[ 437.895258][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 437.895461][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 437.895682][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 437.895893][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  437.896155][ T4000] RIP: 0033:0x7f35e4741b77
[ 437.896368][ T4000] 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
[  437.897086][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  437.897392][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  437.897694][ T4000] RDX: 0000000000000009 RSI: 0000563c926a1d50 RDI: 0000000000000005
[  437.898006][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  437.898311][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  437.898614][ T4000] R13: 0000563c926a1d50 R14: 0000000000000005 R15: 0000563c921ce910
| [  465.843440][ T4000] ------------[ cut here ]------------
| [ 465.843807][ T4000] WARNING: CPU: 2 PID: 4000 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) 
| [  465.844263][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  465.845562][ T4000] Tainted: [W]=WARN
[  465.845732][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 465.846016][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 465.846296][ T4000] 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
[  465.847063][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  465.847345][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  465.847665][ T4000] RDX: 0000000000000000 RSI: ffff88801c61acd0 RDI: ffff88800f8a2e38
[  465.848002][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  465.848506][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  465.848829][ T4000] R13: ffff88801c61a130 R14: ffff88801c61a008 R15: ffff88801c61a000
[  465.849170][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  465.849542][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  465.849827][ T4000] CR2: 00007f35d6ef4810 CR3: 00000000107fe001 CR4: 0000000000772ef0
[  465.850165][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  465.850486][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  465.850803][ T4000] PKRU: 55555554
[  465.850999][ T4000] Call Trace:
[  465.851170][ T4000]  <TASK>
[ 465.851293][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 465.851519][ T4000] ? __warn (kernel/panic.c:748) 
[ 465.851694][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 465.851930][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 465.852163][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 465.852337][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 465.852560][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 465.852793][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 465.853029][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 465.853258][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 465.853539][ T4000] ? _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) 
[ 465.853788][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 465.854052][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 465.854286][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 465.854512][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 465.854750][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 465.855005][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 465.855288][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 465.855469][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 465.855784][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 465.856080][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 465.856363][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 465.856598][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 465.856869][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 465.857109][ T4000] ? 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)) 
[ 465.857282][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 465.857517][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 465.857745][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 465.857979][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 465.858199][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 465.858420][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 465.858686][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 465.858903][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 465.859136][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 465.859353][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 465.859571][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 465.859795][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 465.860030][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 465.860247][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 465.860468][ T4000] ? 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) 
[ 465.860698][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 465.860940][ T4000] device_add (drivers/base/core.c:3672) 
[ 465.861177][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 465.861395][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 465.861625][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 465.861907][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 465.862199][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 465.862421][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 465.862642][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 465.862858][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 465.863096][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 465.863276][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 465.863499][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 465.863715][ T4000] ? 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) 
[ 465.863958][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 465.864185][ T4000] ksys_write (fs/read_write.c:731) 
[ 465.864358][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 465.864577][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 465.864810][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 465.865063][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  465.865334][ T4000] RIP: 0033:0x7f35e4741b77
[ 465.865563][ T4000] 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
[  465.866302][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  465.866627][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  465.866960][ T4000] RDX: 0000000000000008 RSI: 0000563c92698d10 RDI: 0000000000000005
[  465.867278][ T4000] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[  465.867600][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  465.868111][ T4000] R13: 0000563c92698d10 R14: 0000000000000005 R15: 0000563c921ce910
| [  491.198337][ T4000] ------------[ cut here ]------------
| [ 491.198712][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  491.199511][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  491.200745][ T4000] Tainted: [W]=WARN
[  491.200949][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 491.201204][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 491.201469][ T4000] 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
[  491.202204][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  491.202479][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  491.202780][ T4000] RDX: 0000000000000000 RSI: ffff88800a9cacd0 RDI: ffff88800f8a2e38
[  491.203096][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  491.203401][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  491.203712][ T4000] R13: ffff88800a9ca130 R14: ffff88800a9ca008 R15: ffff88800a9ca000
[  491.204021][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  491.204366][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  491.204615][ T4000] CR2: 00007f35d6f65d60 CR3: 00000000107fe003 CR4: 0000000000772ef0
[  491.204936][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  491.205236][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  491.205547][ T4000] PKRU: 55555554
[  491.205701][ T4000] Call Trace:
[  491.205993][ T4000]  <TASK>
[ 491.206105][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 491.206314][ T4000] ? __warn (kernel/panic.c:748) 
[ 491.206474][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 491.206695][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 491.206900][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 491.207138][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 491.207342][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 491.207554][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 491.207776][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 491.207998][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 491.208265][ T4000] ? _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) 
[ 491.208480][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 491.208692][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 491.208904][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 491.209120][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 491.209339][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 491.209567][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 491.209823][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 491.209987][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 491.210250][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 491.210511][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 491.210770][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 491.211023][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 491.211284][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 491.211490][ T4000] ? 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)) 
[ 491.211647][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 491.211863][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 491.212087][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 491.212299][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 491.212506][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 491.212716][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 491.212976][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 491.213181][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 491.213385][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 491.213591][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 491.213800][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 491.214024][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 491.214235][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 491.214440][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 491.214646][ T4000] ? 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) 
[ 491.214859][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 491.215078][ T4000] device_add (drivers/base/core.c:3672) 
[ 491.215286][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 491.215491][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 491.215729][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 491.216006][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 491.216275][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 491.216476][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 491.216689][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 491.216889][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 491.217112][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 491.217276][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 491.217480][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 491.217698][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 491.217969][ T4000] ksys_write (fs/read_write.c:731) 
[ 491.218128][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 491.218332][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 491.218545][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 491.218756][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  491.219016][ T4000] RIP: 0033:0x7f35e4741b77
[ 491.219225][ T4000] 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
[  491.219934][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  491.220242][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  491.220545][ T4000] RDX: 0000000000000009 RSI: 0000563c926b0430 RDI: 0000000000000005
[  491.220852][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  491.221162][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  491.221467][ T4000] R13: 0000563c926b0430 R14: 0000000000000005 R15: 0000563c921ce910
| [  503.037440][ T4000] ------------[ cut here ]------------
| [ 503.037836][ T4000] WARNING: CPU: 2 PID: 4000 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) 
| [  503.038297][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  503.039561][ T4000] Tainted: [W]=WARN
[  503.039728][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 503.040090][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 503.040358][ T4000] 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
[  503.041100][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  503.041548][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  503.041861][ T4000] RDX: 0000000000000000 RSI: ffff88800b43acd0 RDI: ffff88800f8a2e38
[  503.042202][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  503.042534][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  503.042841][ T4000] R13: ffff88800b43a130 R14: ffff88800b43a008 R15: ffff88800b43a000
[  503.043163][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  503.043524][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  503.043781][ T4000] CR2: 00007f35d6f87f30 CR3: 00000000107fe004 CR4: 0000000000772ef0
[  503.044120][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  503.044427][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  503.044755][ T4000] PKRU: 55555554
[  503.044935][ T4000] Call Trace:
[  503.045108][ T4000]  <TASK>
[ 503.045227][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 503.045464][ T4000] ? __warn (kernel/panic.c:748) 
[ 503.045631][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 503.045847][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 503.046081][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 503.046249][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 503.046467][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 503.046684][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 503.046891][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 503.047111][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 503.047384][ T4000] ? _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) 
[ 503.047604][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 503.047825][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 503.048085][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 503.048302][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 503.048528][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 503.048756][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 503.049033][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 503.049203][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 503.049484][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 503.049741][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 503.050006][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 503.050225][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 503.050477][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 503.050681][ T4000] ? 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)) 
[ 503.050866][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 503.051110][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 503.051335][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 503.051554][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 503.051775][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 503.052021][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 503.052310][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 503.052522][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 503.052738][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 503.052959][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 503.053173][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 503.053394][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 503.053597][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 503.053796][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 503.054036][ T4000] ? 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) 
[ 503.054261][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 503.054478][ T4000] device_add (drivers/base/core.c:3672) 
[ 503.054693][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 503.054903][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 503.055161][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 503.055433][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 503.055705][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 503.055933][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 503.056155][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 503.056368][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 503.056586][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 503.056757][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 503.056993][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 503.057227][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 503.057490][ T4000] ksys_write (fs/read_write.c:731) 
[ 503.057649][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 503.057854][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 503.058074][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 503.058283][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  503.058529][ T4000] RIP: 0033:0x7f35e4741b77
[ 503.058734][ T4000] 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
[  503.059411][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  503.059705][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  503.060012][ T4000] RDX: 0000000000000009 RSI: 0000563c926b0430 RDI: 0000000000000005
[  503.060349][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  503.060656][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  503.060998][ T4000] R13: 0000563c926b0430 R14: 0000000000000005 R15: 0000563c921ce910
| [  513.794077][ T4000] ------------[ cut here ]------------
| [ 513.794466][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  513.795045][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  513.796332][ T4000] Tainted: [W]=WARN
[  513.796490][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 513.796746][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 513.797023][ T4000] 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
[  513.797739][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  513.798008][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  513.798312][ T4000] RDX: 0000000000000000 RSI: ffff88801c61acd0 RDI: ffff88800f8a2e38
[  513.798620][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  513.798930][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  513.799234][ T4000] R13: ffff88801c61a130 R14: ffff88801c61a008 R15: ffff88801c61a000
[  513.799536][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  513.799891][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  513.800154][ T4000] CR2: 00007f41ff2b8000 CR3: 00000000107fe005 CR4: 0000000000772ef0
[  513.800458][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  513.800774][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  513.801091][ T4000] PKRU: 55555554
[  513.801249][ T4000] Call Trace:
[  513.801403][ T4000]  <TASK>
[ 513.801509][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 513.801713][ T4000] ? __warn (kernel/panic.c:748) 
[ 513.801870][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 513.802087][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 513.802298][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 513.802456][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 513.802666][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 513.802888][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 513.803103][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 513.803314][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 513.803575][ T4000] ? _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) 
[ 513.803785][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 513.804003][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 513.804219][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 513.804421][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 513.804639][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 513.804859][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 513.805131][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 513.805292][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 513.805566][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 513.805830][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 513.806100][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 513.806318][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 513.806577][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 513.806784][ T4000] ? 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)) 
[ 513.806952][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 513.807167][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 513.807381][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 513.807590][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 513.807795][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 513.808013][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 513.808265][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 513.808475][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 513.808676][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 513.808881][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 513.809091][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 513.809302][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 513.809506][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 513.809712][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 513.809929][ T4000] ? 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) 
[ 513.810158][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 513.810368][ T4000] device_add (drivers/base/core.c:3672) 
[ 513.810577][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 513.810787][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 513.811012][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 513.811279][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 513.811550][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 513.811753][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 513.811973][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 513.812176][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 513.812386][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 513.812550][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 513.812755][ T4000] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 513.812984][ T4000] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 513.813254][ T4000] ksys_write (fs/read_write.c:731) 
[ 513.813412][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 513.813617][ T4000] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 513.813831][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 513.814047][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  513.814302][ T4000] RIP: 0033:0x7f35e4741b77
[ 513.814511][ T4000] 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
[  513.815224][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  513.815528][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  513.815831][ T4000] RDX: 0000000000000009 RSI: 0000563c926b0430 RDI: 0000000000000005
[  513.816143][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  513.816448][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  513.816749][ T4000] R13: 0000563c926b0430 R14: 0000000000000005 R15: 0000563c921ce910
| [  523.732738][ T4000] ------------[ cut here ]------------
| [ 523.733341][ T4000] WARNING: CPU: 2 PID: 4000 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) 
| [  523.733775][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  523.735060][ T4000] Tainted: [W]=WARN
[  523.735233][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 523.735505][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.735783][ T4000] 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
[  523.736518][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  523.736818][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  523.737143][ T4000] RDX: 0000000000000000 RSI: ffff88800a9cacd0 RDI: ffff88800f8a2e38
[  523.737462][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  523.737783][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  523.738114][ T4000] R13: ffff88800a9ca130 R14: ffff88800a9ca008 R15: ffff88800a9ca000
[  523.738447][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[  523.738815][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  523.739103][ T4000] CR2: 00007f35d6ef4810 CR3: 00000000107fe006 CR4: 0000000000772ef0
[  523.739428][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  523.739750][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  523.740076][ T4000] PKRU: 55555554
[  523.740250][ T4000] Call Trace:
[  523.740419][ T4000]  <TASK>
[ 523.740539][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.740778][ T4000] ? __warn (kernel/panic.c:748) 
[ 523.740962][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.741192][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 523.741419][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 523.741593][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 523.741815][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 523.742075][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.742303][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 523.742534][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 523.742816][ T4000] ? _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) 
[ 523.743055][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 523.743282][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 523.743509][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 523.743728][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 523.743972][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 523.744219][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 523.744496][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 523.744672][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 523.744965][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 523.745255][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 523.745549][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 523.745784][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 523.746090][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 523.746314][ T4000] ? 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)) 
[ 523.746486][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 523.746715][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 523.746956][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 523.747181][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 523.747413][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 523.747642][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 523.747910][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 523.748144][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 523.748362][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 523.748586][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 523.748808][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 523.749056][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 523.749278][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 523.749500][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 523.749722][ T4000] ? 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) 
[ 523.749962][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 523.750185][ T4000] device_add (drivers/base/core.c:3672) 
[ 523.750410][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 523.750630][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 523.750895][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 523.751196][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 523.751480][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 523.751698][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 523.751934][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 523.752159][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 523.752391][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 523.752574][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 523.752799][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 523.753031][ T4000] ? 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) 
[ 523.753262][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 523.753492][ T4000] ksys_write (fs/read_write.c:731) 
[ 523.753665][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 523.753883][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 523.754131][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 523.754356][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  523.754626][ T4000] RIP: 0033:0x7f35e4741b77
[ 523.754851][ T4000] 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
[  523.755590][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  523.755912][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  523.756242][ T4000] RDX: 0000000000000009 RSI: 0000563c926b0430 RDI: 0000000000000005
[  523.756560][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  523.756881][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  523.757214][ T4000] R13: 0000563c926b0430 R14: 0000000000000005 R15: 0000563c921ce910
| [  523.767478][ T4000] ------------[ cut here ]------------
| [ 523.767704][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  523.768120][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  523.769337][ T4000] Tainted: [W]=WARN
[  523.769492][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 523.769744][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.770018][ T4000] 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
[  523.770736][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  523.771007][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  523.771310][ T4000] RDX: 0000000000000000 RSI: ffff88800c11acd0 RDI: ffff88800f8a2e38
[  523.771618][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  523.771932][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  523.772236][ T4000] R13: ffff88800c11a130 R14: ffff88800c11a008 R15: ffff88800c11a000
[  523.772536][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  523.772894][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  523.773169][ T4000] CR2: 00007fab33dcb000 CR3: 00000000107fe001 CR4: 0000000000772ef0
[  523.773464][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  523.773759][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  523.774062][ T4000] PKRU: 55555554
[  523.774219][ T4000] Call Trace:
[  523.774369][ T4000]  <TASK>
[ 523.774473][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.774671][ T4000] ? __warn (kernel/panic.c:748) 
[ 523.774824][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.775038][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 523.775244][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 523.775396][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 523.775596][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 523.775815][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.776041][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 523.776271][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 523.776532][ T4000] ? _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) 
[ 523.776742][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 523.776965][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 523.777182][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 523.777394][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 523.777606][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 523.777821][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 523.778089][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 523.778245][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 523.778511][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 523.778769][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 523.779058][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 523.779271][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 523.779526][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 523.779727][ T4000] ? 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)) 
[ 523.779879][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 523.780115][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 523.780352][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 523.780561][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 523.780777][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 523.780997][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 523.781250][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 523.781456][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 523.781665][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 523.781871][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 523.782088][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 523.782299][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 523.782506][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 523.782710][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 523.782915][ T4000] ? 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) 
[ 523.783153][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 523.783358][ T4000] device_add (drivers/base/core.c:3672) 
[ 523.783559][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 523.783757][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 523.783992][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 523.784277][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 523.784545][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 523.784753][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 523.784976][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 523.785179][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 523.785390][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 523.785556][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 523.785768][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 523.785980][ T4000] ? 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) 
[ 523.786197][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 523.786411][ T4000] ksys_write (fs/read_write.c:731) 
[ 523.786579][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 523.786779][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 523.786998][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 523.787202][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  523.787447][ T4000] RIP: 0033:0x7f35e4741b77
[ 523.787652][ T4000] 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
[  523.788362][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  523.788684][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  523.788998][ T4000] RDX: 0000000000000009 RSI: 0000563c926b0430 RDI: 0000000000000005
[  523.789301][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  523.789601][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940
[  523.789902][ T4000] R13: 0000563c926b0430 R14: 0000000000000005 R15: 0000563c921ce910
| [  523.799659][ T4000] ------------[ cut here ]------------
| [ 523.799878][ T4000] WARNING: CPU: 3 PID: 4000 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) 
| [  523.801116][ T4000] Modules linked in: netdevsim psample dccp_ipv6 dccp_ipv4 dccp bonding sctp sch_fq act_gact cls_flower vxlan act_mirred cls_matchall ip6_gre gre xfrm_interface sha1_generic xfrm_user cls_bpf sch_ingress [last unloaded: test_bpf]
| [  523.802433][ T4000] Tainted: [W]=WARN
[  523.802588][ T4000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 523.802844][ T4000] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.803203][ T4000] 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
[  523.803910][ T4000] RSP: 0018:ffffc90000f87528 EFLAGS: 00010246
[  523.804265][ T4000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[  523.804567][ T4000] RDX: 0000000000000000 RSI: ffff88801d5dacd0 RDI: ffff88800f8a2e38
[  523.804869][ T4000] RBP: ffffffffba853580 R08: 0000000000000000 R09: fffffbfff70c2504
[  523.805268][ T4000] R10: ffffffffb8612827 R11: ffff88800f8a2300 R12: 0000000000000000
[  523.805579][ T4000] R13: ffff88801d5da130 R14: ffff88801d5da008 R15: ffff88801d5da000
[  523.805881][ T4000] FS:  00007f35e45271c0(0000) GS:ffff88806cf80000(0000) knlGS:0000000000000000
[  523.806334][ T4000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  523.806606][ T4000] CR2: 00007fab33dcb000 CR3: 00000000107fe001 CR4: 0000000000772ef0
[  523.806909][ T4000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  523.807312][ T4000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  523.807617][ T4000] PKRU: 55555554
[  523.807771][ T4000] Call Trace:
[  523.808020][ T4000]  <TASK>
[ 523.808128][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.808333][ T4000] ? __warn (kernel/panic.c:748) 
[ 523.808490][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.808703][ T4000] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 523.808915][ T4000] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 523.809169][ T4000] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 523.809376][ T4000] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 523.809596][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 523.809802][ T4000] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 523.810113][ T4000] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 523.810382][ T4000] ? _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) 
[ 523.810593][ T4000] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 523.810808][ T4000] register_netdevice (net/core/dev.c:11003) 
[ 523.811115][ T4000] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 523.811321][ T4000] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 523.811540][ T4000] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 523.811763][ T4000] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 523.812121][ T4000] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 523.812282][ T4000] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 523.812551][ T4000] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 523.812815][ T4000] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 523.813176][ T4000] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 523.813397][ T4000] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 523.813660][ T4000] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 523.813867][ T4000] ? 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)) 
[ 523.814120][ T4000] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 523.814337][ T4000] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 523.814550][ T4000] __driver_probe_device (drivers/base/dd.c:800) 
[ 523.814757][ T4000] driver_probe_device (drivers/base/dd.c:830) 
[ 523.815059][ T4000] __device_attach_driver (drivers/base/dd.c:959) 
[ 523.815275][ T4000] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 523.815526][ T4000] bus_for_each_drv (drivers/base/bus.c:462) 
[ 523.815733][ T4000] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 523.816030][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 523.816240][ T4000] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 523.816445][ T4000] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 523.816659][ T4000] __device_attach (drivers/base/dd.c:1030) 
[ 523.816868][ T4000] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 523.817168][ T4000] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 523.817375][ T4000] ? 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) 
[ 523.817586][ T4000] bus_probe_device (drivers/base/bus.c:537) 
[ 523.817795][ T4000] device_add (drivers/base/core.c:3672) 
[ 523.818098][ T4000] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 523.818303][ T4000] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 523.818524][ T4000] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 523.818789][ T4000] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 523.819152][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 523.819356][ T4000] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 523.819566][ T4000] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 523.819767][ T4000] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 523.820079][ T4000] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 523.820246][ T4000] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 523.820457][ T4000] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 523.820661][ T4000] ? 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) 
[ 523.820877][ T4000] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 523.821187][ T4000] ksys_write (fs/read_write.c:731) 
[ 523.821348][ T4000] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 523.821551][ T4000] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 523.821771][ T4000] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 523.822074][ T4000] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  523.822328][ T4000] RIP: 0033:0x7f35e4741b77
[ 523.822536][ T4000] 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
[  523.823338][ T4000] RSP: 002b:00007ffd69bb92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  523.823646][ T4000] RAX: ffffffffffffffda RBX: 00007f35e4527140 RCX: 00007f35e4741b77
[  523.824059][ T4000] RDX: 0000000000000009 RSI: 0000563c926b0430 RDI: 0000000000000005
[  523.824362][ T4000] RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
[  523.824664][ T4000] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f35d63c4940


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