======================================
| [ 4649.037074][T11187] Initializing XFRM netlink socket
| [ 4651.755217][ T7985] ------------[ cut here ]------------
| [ 4651.755672][ T7985] WARNING: CPU: 2 PID: 7985 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) 
| [ 4651.756200][ T7985] Modules linked in: netdevsim psample xfrm_user macsec ip_gre cls_u32 sch_htb bonding sch_fq ip6_gre gre xt_conntrack cls_bpf act_gact cls_flower sch_ingress sctp_diag sctp nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 unix_diag poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xt_HL amt ip6t_rpfilter nft_compat nf_tables vxlan mpls_gso mpls_iptunnel mpls_router
[ 4651.758182][ T7985] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4651.758466][ T7985] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4651.758747][ T7985] 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
[ 4651.759501][ T7985] RSP: 0018:ffffc90000f47528 EFLAGS: 00010246
[ 4651.759784][ T7985] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4651.760118][ T7985] RDX: 0000000000000000 RSI: ffff888005eb2cd0 RDI: ffff8880152a2e38
[ 4651.760443][ T7985] RBP: ffffffff9c653580 R08: 0000000000000000 R09: fffffbfff3482504
[ 4651.760947][ T7985] R10: ffffffff9a412827 R11: ffff8880152a2300 R12: 0000000000000000
[ 4651.761286][ T7985] R13: ffff888005eb2130 R14: ffff888005eb2008 R15: ffff888005eb2000
[ 4651.761651][ T7985] FS:  00007f6a8351b740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 4651.762058][ T7985] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4651.762349][ T7985] CR2: 000055bc7bc9e760 CR3: 000000001842c005 CR4: 0000000000772ef0
[ 4651.762699][ T7985] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4651.763041][ T7985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4651.763379][ T7985] PKRU: 55555554
[ 4651.763555][ T7985] Call Trace:
[ 4651.763729][ T7985]  <TASK>
[ 4651.763856][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4651.764118][ T7985] ? __warn (kernel/panic.c:748) 
[ 4651.764305][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4651.764552][ T7985] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4651.764790][ T7985] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4651.764983][ T7985] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4651.765222][ T7985] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4651.765456][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4651.765681][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4651.765909][ T7985] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4651.766199][ T7985] ? _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) 
[ 4651.766452][ T7985] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4651.766686][ T7985] register_netdevice (net/core/dev.c:11003) 
[ 4651.766949][ T7985] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4651.767181][ T7985] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4651.767426][ T7985] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4651.767685][ T7985] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4651.768032][ T7985] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4651.768208][ T7985] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4651.768495][ T7985] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4651.768775][ T7985] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4651.769074][ T7985] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4651.769313][ T7985] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4651.769592][ T7985] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4651.769816][ T7985] ? 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)) 
[ 4651.770004][ T7985] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4651.770234][ T7985] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4651.770462][ T7985] __driver_probe_device (drivers/base/dd.c:800) 
[ 4651.770689][ T7985] driver_probe_device (drivers/base/dd.c:830) 
[ 4651.770917][ T7985] __device_attach_driver (drivers/base/dd.c:959) 
[ 4651.771177][ T7985] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4651.771497][ T7985] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4651.771732][ T7985] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4651.771970][ T7985] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4651.772202][ T7985] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4651.772430][ T7985] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4651.772677][ T7985] __device_attach (drivers/base/dd.c:1030) 
[ 4651.772900][ T7985] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4651.773130][ T7985] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4651.773349][ T7985] ? 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) 
[ 4651.773579][ T7985] bus_probe_device (drivers/base/bus.c:537) 
[ 4651.773802][ T7985] device_add (drivers/base/core.c:3672) 
[ 4651.774037][ T7985] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4651.774260][ T7985] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4651.774493][ T7985] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4651.774782][ T7985] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4651.775093][ T7985] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4651.775317][ T7985] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4651.775546][ T7985] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4651.775764][ T7985] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4651.776012][ T7985] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4651.776193][ T7985] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4651.776421][ T7985] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 4651.776642][ T7985] ? 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) 
[ 4651.776870][ T7985] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4651.777118][ T7985] ksys_write (fs/read_write.c:731) 
[ 4651.777291][ T7985] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4651.777513][ T7985] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 4651.777747][ T7985] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4651.777980][ T7985] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4651.778250][ T7985] RIP: 0033:0x7f6a8365cb77
[ 4651.778480][ T7985] 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
[ 4651.779251][ T7985] RSP: 002b:00007ffcf520a758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4651.779599][ T7985] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6a8365cb77
[ 4651.779924][ T7985] RDX: 0000000000000002 RSI: 000055bc7bc9e760 RDI: 0000000000000001
[ 4651.780287][ T7985] RBP: 000055bc7bc9e760 R08: 0000000000000000 R09: 00007f6a836cf4e0
[ 4651.780639][ T7985] R10: 00007f6a836cf3e0 R11: 0000000000000246 R12: 0000000000000002
[ 4651.780986][ T7985] R13: 00007f6a83718760 R14: 0000000000000002 R15: 00007f6a837139c0
| [ 4659.032723][ T7985] ------------[ cut here ]------------
| [ 4659.033196][ T7985] WARNING: CPU: 2 PID: 7985 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) 
| [ 4659.033664][ T7985] Modules linked in: netdevsim psample xfrm_user macsec ip_gre cls_u32 sch_htb bonding sch_fq ip6_gre gre xt_conntrack cls_bpf act_gact cls_flower sch_ingress sctp_diag sctp nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 unix_diag poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xt_HL amt ip6t_rpfilter nft_compat nf_tables vxlan mpls_gso mpls_iptunnel mpls_router [last unloaded: netdevsim]
| [ 4659.036054][ T7985] Tainted: [W]=WARN
[ 4659.036261][ T7985] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4659.036550][ T7985] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.036848][ T7985] 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
[ 4659.037621][ T7985] RSP: 0018:ffffc90000f47528 EFLAGS: 00010246
[ 4659.037914][ T7985] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4659.038268][ T7985] RDX: 0000000000000000 RSI: ffff888013522cd0 RDI: ffff8880152a2e38
[ 4659.038608][ T7985] RBP: ffffffff9c653580 R08: 0000000000000000 R09: fffffbfff3482504
[ 4659.038961][ T7985] R10: ffffffff9a412827 R11: ffff8880152a2300 R12: 0000000000000000
[ 4659.039296][ T7985] R13: ffff888013522130 R14: ffff888013522008 R15: ffff888013522000
[ 4659.039626][ T7985] FS:  00007f6a8351b740(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
[ 4659.040030][ T7985] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4659.040474][ T7985] CR2: 000055bc7bc9e760 CR3: 000000001842c002 CR4: 0000000000772ef0
[ 4659.040818][ T7985] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4659.041170][ T7985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4659.041572][ T7985] PKRU: 55555554
[ 4659.041765][ T7985] Call Trace:
[ 4659.041968][ T7985]  <TASK>
[ 4659.042105][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.042355][ T7985] ? __warn (kernel/panic.c:748) 
[ 4659.042557][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.042809][ T7985] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4659.043061][ T7985] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4659.043252][ T7985] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4659.043487][ T7985] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4659.043737][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.043997][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4659.044252][ T7985] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4659.044556][ T7985] ? _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) 
[ 4659.044808][ T7985] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4659.045074][ T7985] register_netdevice (net/core/dev.c:11003) 
[ 4659.045331][ T7985] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4659.045562][ T7985] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4659.045812][ T7985] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4659.046076][ T7985] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4659.046392][ T7985] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4659.046582][ T7985] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4659.046884][ T7985] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4659.047196][ T7985] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4659.047501][ T7985] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4659.047749][ T7985] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4659.048051][ T7985] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4659.048291][ T7985] ? 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)) 
[ 4659.048469][ T7985] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4659.048713][ T7985] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4659.048966][ T7985] __driver_probe_device (drivers/base/dd.c:800) 
[ 4659.049207][ T7985] driver_probe_device (drivers/base/dd.c:830) 
[ 4659.049440][ T7985] __device_attach_driver (drivers/base/dd.c:959) 
[ 4659.049677][ T7985] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4659.049966][ T7985] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4659.050194][ T7985] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4659.050423][ T7985] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4659.050661][ T7985] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4659.050893][ T7985] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4659.051154][ T7985] __device_attach (drivers/base/dd.c:1030) 
[ 4659.051421][ T7985] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4659.051675][ T7985] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4659.051922][ T7985] ? 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) 
[ 4659.052206][ T7985] bus_probe_device (drivers/base/bus.c:537) 
[ 4659.052460][ T7985] device_add (drivers/base/core.c:3672) 
[ 4659.052722][ T7985] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4659.052967][ T7985] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4659.053212][ T7985] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4659.053515][ T7985] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4659.053812][ T7985] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4659.054056][ T7985] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4659.054300][ T7985] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4659.054531][ T7985] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4659.054781][ T7985] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4659.054979][ T7985] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4659.055222][ T7985] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 4659.055456][ T7985] ? 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) 
[ 4659.055714][ T7985] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4659.055967][ T7985] ksys_write (fs/read_write.c:731) 
[ 4659.056154][ T7985] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4659.056386][ T7985] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[ 4659.056627][ T7985] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4659.056880][ T7985] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4659.057191][ T7985] RIP: 0033:0x7f6a8365cb77
[ 4659.057440][ T7985] 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
[ 4659.058267][ T7985] RSP: 002b:00007ffcf520b338 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4659.058616][ T7985] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f6a8365cb77
[ 4659.058963][ T7985] RDX: 0000000000000005 RSI: 000055bc7bc9e760 RDI: 0000000000000001
[ 4659.059303][ T7985] RBP: 000055bc7bc9e760 R08: 0000000000000000 R09: 00007f6a836cf4e0
[ 4659.059641][ T7985] R10: 00007f6a836cf3e0 R11: 0000000000000246 R12: 0000000000000005
[ 4659.059994][ T7985] R13: 00007f6a83718760 R14: 0000000000000005 R15: 00007f6a837139c0
| [ 4659.089423][ T7985] ------------[ cut here ]------------
| [ 4659.089833][ T7985] WARNING: CPU: 0 PID: 7985 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) 
| [ 4659.090384][ T7985] Modules linked in: netdevsim psample xfrm_user macsec ip_gre cls_u32 sch_htb bonding sch_fq ip6_gre gre xt_conntrack cls_bpf act_gact cls_flower sch_ingress sctp_diag sctp nft_chain_nat xt_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 unix_diag poly1305_generic libpoly1305 chacha_generic libchacha chacha20poly1305 tls xt_HL amt ip6t_rpfilter nft_compat nf_tables vxlan mpls_gso mpls_iptunnel mpls_router [last unloaded: netdevsim]
| [ 4659.092643][ T7985] Tainted: [W]=WARN
[ 4659.092808][ T7985] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4659.093085][ T7985] RIP: 0010:__netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.093362][ T7985] 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
[ 4659.094113][ T7985] RSP: 0018:ffffc90000f47528 EFLAGS: 00010246
[ 4659.094383][ T7985] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 4659.094701][ T7985] RDX: 0000000000000000 RSI: ffff888004ce2cd0 RDI: ffff8880152a2e38
[ 4659.095034][ T7985] RBP: ffffffff9c653580 R08: 0000000000000000 R09: fffffbfff3482504
[ 4659.095353][ T7985] R10: ffffffff9a412827 R11: ffff8880152a2300 R12: 0000000000000000
[ 4659.095671][ T7985] R13: ffff888004ce2130 R14: ffff888004ce2008 R15: ffff888004ce2000
[ 4659.096000][ T7985] FS:  00007f6a8351b740(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
[ 4659.096542][ T7985] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4659.096809][ T7985] CR2: 00007f6a836bcc8c CR3: 000000001842c004 CR4: 0000000000772ef0
[ 4659.097139][ T7985] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4659.097456][ T7985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4659.097776][ T7985] PKRU: 55555554
[ 4659.097949][ T7985] Call Trace:
[ 4659.098114][ T7985]  <TASK>
[ 4659.098225][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.098439][ T7985] ? __warn (kernel/panic.c:748) 
[ 4659.098607][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.098824][ T7985] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 4659.099065][ T7985] ? handle_bug (arch/x86/kernel/traps.c:285) 
[ 4659.099234][ T7985] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) 
[ 4659.099456][ T7985] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) 
[ 4659.099693][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 ./include/net/netdev_lock.h:49 net/core/dev.c:10566) 
[ 4659.099911][ T7985] ? __netdev_update_features (./include/net/netdev_lock.h:52 net/core/dev.c:10566) 
[ 4659.100146][ T7985] ? __pfx___netdev_update_features (net/core/dev.c:10559) 
[ 4659.100424][ T7985] ? _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) 
[ 4659.100648][ T7985] ? netdev_register_kobject (net/core/net-sysfs.c:2344) 
[ 4659.100872][ T7985] register_netdevice (net/core/dev.c:11003) 
[ 4659.101112][ T7985] ? __pfx_register_netdevice (net/core/dev.c:10881) 
[ 4659.101349][ T7985] ? __debugfs_create_file (fs/debugfs/inode.c:466) 
[ 4659.101576][ T7985] nsim_create (drivers/net/netdevsim/netdev.c:958 drivers/net/netdevsim/netdev.c:1018) netdevsim 
[ 4659.101812][ T7985] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1393) netdevsim 
[ 4659.102099][ T7985] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4659.102270][ T7985] ? __pfx___nsim_dev_port_add (drivers/net/netdevsim/dev.c:1357) netdevsim 
[ 4659.102553][ T7985] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[ 4659.102827][ T7985] nsim_dev_port_add_all (drivers/net/netdevsim/dev.c:1449) netdevsim 
[ 4659.103114][ T7985] nsim_drv_probe (drivers/net/netdevsim/dev.c:1607) netdevsim 
[ 4659.103337][ T7985] ? __pfx_nsim_drv_probe (drivers/net/netdevsim/dev.c:1528) netdevsim 
[ 4659.103613][ T7985] ? kernfs_create_link (fs/kernfs/symlink.c:48) 
[ 4659.103834][ T7985] ? 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)) 
[ 4659.104013][ T7985] ? sysfs_do_create_link_sd (fs/sysfs/symlink.c:48) 
[ 4659.104242][ T7985] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) 
[ 4659.104468][ T7985] __driver_probe_device (drivers/base/dd.c:800) 
[ 4659.104686][ T7985] driver_probe_device (drivers/base/dd.c:830) 
[ 4659.104904][ T7985] __device_attach_driver (drivers/base/dd.c:959) 
[ 4659.105138][ T7985] ? __pfx___device_attach_driver (drivers/base/dd.c:922) 
[ 4659.105406][ T7985] bus_for_each_drv (drivers/base/bus.c:462) 
[ 4659.105629][ T7985] ? __pfx_bus_for_each_drv (drivers/base/bus.c:450) 
[ 4659.105838][ T7985] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4659.106061][ T7985] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4659.106278][ T7985] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 4659.106499][ T7985] __device_attach (drivers/base/dd.c:1030) 
[ 4659.106710][ T7985] ? __pfx___device_attach (drivers/base/dd.c:1001) 
[ 4659.106921][ T7985] ? bus_to_subsys (drivers/base/bus.c:85) 
[ 4659.107149][ T7985] ? 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) 
[ 4659.107368][ T7985] bus_probe_device (drivers/base/bus.c:537) 
[ 4659.107777][ T7985] device_add (drivers/base/core.c:3672) 
[ 4659.108011][ T7985] ? __pfx_device_add (drivers/base/core.c:3548) 
[ 4659.108226][ T7985] ? __init_waitqueue_head (./include/linux/list.h:37 kernel/sched/wait.c:12) 
[ 4659.108453][ T7985] new_device_store (drivers/net/netdevsim/bus.c:443 drivers/net/netdevsim/bus.c:173) netdevsim 
[ 4659.108734][ T7985] ? __pfx_new_device_store (drivers/net/netdevsim/bus.c:142) netdevsim 
[ 4659.109160][ T7985] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4659.109379][ T7985] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4659.109599][ T7985] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4659.109811][ T7985] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4659.110179][ T7985] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4659.110357][ T7985] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4659.110579][ T7985] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 4659.110807][ T7985] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 4659.111037][ T7985] ksys_write (fs/read_write.c:731) 
[ 4659.111363][ T7985] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4659.111586][ T7985] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4659.111799][ T7985] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4659.112070][ T7985] RIP: 0033:0x7f6a8365cb77
[ 4659.112426][ T7985] Code: Unable to access opcode bytes at 0x7f6a8365cb4d.

Code starting with the faulting instruction
===========================================
[ 4659.112724][ T7985] RSP: 002b:00007ffcf520b598 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4659.113049][ T7985] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f6a8365cb77
[ 4659.113358][ T7985] RDX: 0000000000000005 RSI: 000055bc7bc9e760 RDI: 0000000000000001
[ 4659.113665][ T7985] RBP: 000055bc7bc9e760 R08: 0000000000000000 R09: 00007f6a836cf4e0
[ 4659.114117][ T7985] R10: 00007f6a836cf3e0 R11: 0000000000000246 R12: 0000000000000005


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