======================================
| [    2.168185] netdevsim netdevsim30241 eni30241np1: renamed from eth0
| [    2.186316] ------------[ cut here ]------------
| [    2.186446] kernel BUG at net/core/net-sysfs.c:2246!
| [    2.186522] Oops: invalid opcode: 0000 [#1] SMP
[    2.186667] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.186720] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[    2.186771] Code: fa 0f 1f 44 00 00 80 7f e0 04 75 1d 55 48 8d af d8 fa ff ff 48 8b bf 08 fc ff ff e8 5d 4a a6 ff 48 89 ef 5d e9 14 51 a6 ff 90 <0f> 0b 90 f3 0f 1e fa 0f 1f 44 00 00 55 48 89 f5 48 8d 97 f0 fb ff
All code
========
   0:	fa                   	cli
   1:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   6:	80 7f e0 04          	cmpb   $0x4,-0x20(%rdi)
   a:	75 1d                	jne    0x29
   c:	55                   	push   %rbp
   d:	48 8d af d8 fa ff ff 	lea    -0x528(%rdi),%rbp
  14:	48 8b bf 08 fc ff ff 	mov    -0x3f8(%rdi),%rdi
  1b:	e8 5d 4a a6 ff       	call   0xffffffffffa64a7d
  20:	48 89 ef             	mov    %rbp,%rdi
  23:	5d                   	pop    %rbp
  24:	e9 14 51 a6 ff       	jmp    0xffffffffffa6513d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	f3 0f 1e fa          	endbr64
  31:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  36:	55                   	push   %rbp
  37:	48 89 f5             	mov    %rsi,%rbp
  3a:	48                   	rex.W
  3b:	8d                   	.byte 0x8d
  3c:	97                   	xchg   %eax,%edi
  3d:	f0 fb                	lock sti
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	f3 0f 1e fa          	endbr64
   7:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   c:	55                   	push   %rbp
   d:	48 89 f5             	mov    %rsi,%rbp
  10:	48                   	rex.W
  11:	8d                   	.byte 0x8d
  12:	97                   	xchg   %eax,%edi
  13:	f0 fb                	lock sti
  15:	ff                   	.byte 0xff
[    2.186915] RSP: 0018:ffffa67ec0293948 EFLAGS: 00010297
[    2.186961] RAX: ffffffffb3738130 RBX: 00000000ffffffff RCX: 0000000000000002
[    2.187042] RDX: 0000000000000006 RSI: ffffffffb35561a4 RDI: ffff9637c13bc528
[    2.187110] RBP: ffff9637c13bc528 R08: 00000000000001cc R09: 0000000000000170
[    2.187180] R10: 0000000000000180 R11: 0000000000000170 R12: ffff9637c3934000
[    2.187256] R13: ffffffffb3ab1da0 R14: ffff9637c1ca6dc0 R15: ffff9637c13bc000
[    2.187320] FS:  00007faf3b30b800(0000) GS:ffff96384a0d6000(0000) knlGS:0000000000000000
[    2.187383] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.187434] CR2: 00007faf3b423e60 CR3: 0000000005387005 CR4: 0000000000772ef0
[    2.187501] PKRU: 55555554
[    2.187528] Call Trace:
[    2.187555]  <TASK>
[    2.187579]  device_release (drivers/base/core.c:2569)
[    2.187627]  kobject_put (lib/kobject.c:693 lib/kobject.c:720 ./include/linux/kref.h:65 lib/kobject.c:737)
[    2.187662]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[    2.187705] nsim_destroy (drivers/net/netdevsim/netdevsim.h:396 drivers/net/netdevsim/netdev.c:1186) netdevsim
[    2.187759] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[    2.187811] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1483 drivers/net/netdevsim/dev.c:1707) netdevsim
[    2.187855] nsim_dev_reload_down (drivers/net/netdevsim/dev.c:984) netdevsim
[    2.187899]  devlink_reload (net/devlink/dev.c:462)
[    2.187939]  devlink_nl_reload_doit (net/devlink/dev.c:584)
[    2.187988]  genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115)
[    2.188038]  genl_rcv_msg (net/netlink/genetlink.c:1195 net/netlink/genetlink.c:1210)
[    2.188068]  ? devlink_nl_pre_doit_port (net/devlink/netlink.c:257)
[    2.188121]  ? devlink_reload (net/devlink/dev.c:520)
[    2.188153]  ? devlink_nl_post_doit (net/devlink/netlink.c:288)
[    2.188199]  ? genl_family_rcv_msg_dumpit (net/netlink/genetlink.c:1201)
[    2.188244]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[    2.188284]  genl_rcv (net/netlink/genetlink.c:1220)
[    2.188315]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[    2.188357]  ? __alloc_skb (net/core/skbuff.c:690)
[    2.188394]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[    2.188430]  __sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2244)
[    2.188473]  ? do_sys_openat2 (fs/open.c:1447)
[    2.188515]  __x64_sys_sendto (net/socket.c:2251 net/socket.c:2247 net/socket.c:2247)
[    2.188548]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.188580]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[    2.188626] RIP: 0033:0x7faf3b4d927a
[    2.188663] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[    2.188804] RSP: 002b:00007ffff9e2edd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[    2.188873] RAX: ffffffffffffffda RBX: 0000000033c38b20 RCX: 00007faf3b4d927a
[    2.188936] RDX: 0000000000000040 RSI: 0000000033c38b20 RDI: 0000000000000003
[    2.189001] RBP: 0000000033c38910 R08: 00007faf3b6bd200 R09: 000000000000000c
[    2.189054] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000040f510
[    2.189109] R13: 0000000033c38910 R14: 0000000000000000 R15: 0000000000000001
| [    2.265323] ------------[ cut here ]------------
| [    2.265413] kernel BUG at net/core/net-sysfs.c:2246!
| [    2.265469] Oops: invalid opcode: 0000 [#2] SMP
| [    2.265604] Tainted: [D]=DIE
[    2.265635] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.265691] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[    2.265748] Code: fa 0f 1f 44 00 00 80 7f e0 04 75 1d 55 48 8d af d8 fa ff ff 48 8b bf 08 fc ff ff e8 5d 4a a6 ff 48 89 ef 5d e9 14 51 a6 ff 90 <0f> 0b 90 f3 0f 1e fa 0f 1f 44 00 00 55 48 89 f5 48 8d 97 f0 fb ff
All code
========
   0:	fa                   	cli
   1:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   6:	80 7f e0 04          	cmpb   $0x4,-0x20(%rdi)
   a:	75 1d                	jne    0x29
   c:	55                   	push   %rbp
   d:	48 8d af d8 fa ff ff 	lea    -0x528(%rdi),%rbp
  14:	48 8b bf 08 fc ff ff 	mov    -0x3f8(%rdi),%rdi
  1b:	e8 5d 4a a6 ff       	call   0xffffffffffa64a7d
  20:	48 89 ef             	mov    %rbp,%rdi
  23:	5d                   	pop    %rbp
  24:	e9 14 51 a6 ff       	jmp    0xffffffffffa6513d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	f3 0f 1e fa          	endbr64
  31:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  36:	55                   	push   %rbp
  37:	48 89 f5             	mov    %rsi,%rbp
  3a:	48                   	rex.W
  3b:	8d                   	.byte 0x8d
  3c:	97                   	xchg   %eax,%edi
  3d:	f0 fb                	lock sti
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	f3 0f 1e fa          	endbr64
   7:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   c:	55                   	push   %rbp
   d:	48 89 f5             	mov    %rsi,%rbp
  10:	48                   	rex.W
  11:	8d                   	.byte 0x8d
  12:	97                   	xchg   %eax,%edi
  13:	f0 fb                	lock sti
  15:	ff                   	.byte 0xff
[    2.265895] RSP: 0018:ffffa67ec058fbf0 EFLAGS: 00010297
[    2.265941] RAX: ffffffffb3738130 RBX: 00000000ffffffff RCX: 0000000000000002
[    2.266003] RDX: 0000000000000006 RSI: ffffffffb35561a4 RDI: ffff9637c13be528
[    2.266068] RBP: ffff9637c13be528 R08: 000000000000011c R09: 00000000000000b8
[    2.266127] R10: 00000000000000d0 R11: 00000000000000c0 R12: ffff9637c1b07600
[    2.266187] R13: ffffffffb3ab1da0 R14: ffff9637c1ca6cd0 R15: ffff9637c13be000
[    2.266248] FS:  00007f1583218740(0000) GS:ffff963849fd6000(0000) knlGS:0000000000000000
[    2.266331] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.266386] CR2: 00007f1575c02170 CR3: 0000000005382004 CR4: 0000000000772ef0
[    2.266446] PKRU: 55555554
[    2.266473] Call Trace:
[    2.266493]  <TASK>
[    2.266519]  device_release (drivers/base/core.c:2569)
[    2.266560]  kobject_put (lib/kobject.c:693 lib/kobject.c:720 ./include/linux/kref.h:65 lib/kobject.c:737)
[    2.266596]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[    2.266640] nsim_destroy (drivers/net/netdevsim/netdevsim.h:396 drivers/net/netdevsim/netdev.c:1186) netdevsim
[    2.266694] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[    2.266744] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1483 drivers/net/netdevsim/dev.c:1707) netdevsim
[    2.266796] nsim_drv_remove (drivers/net/netdevsim/dev.c:1724) netdevsim
[    2.266843]  device_release_driver_internal (drivers/base/dd.c:1276 drivers/base/dd.c:1297)
[    2.266893]  bus_remove_device (./include/linux/kobject.h:193 (discriminator 3) drivers/base/base.h:73 (discriminator 3) drivers/base/bus.c:586 (discriminator 3))
[    2.266929]  device_del (drivers/base/core.c:3879)
[    2.266960]  device_unregister (drivers/base/core.c:3796 drivers/base/core.c:3920)
[    2.266996] del_device_store (drivers/net/netdevsim/bus.c:248) netdevsim
[    2.267042]  kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356)
[    2.267094]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[    2.267130]  ksys_write (fs/read_write.c:738)
[    2.267167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.267212]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[    2.267259] RIP: 0033:0x7f15833f7257
[    2.267295] Code: 0f 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:	0f 00                	(bad)
   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
[    2.267434] RSP: 002b:00007fff7d7dc2b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[    2.267500] RAX: ffffffffffffffda RBX: 00007f15832186e0 RCX: 00007f15833f7257
[    2.267561] RDX: 0000000000000005 RSI: 0000564e34a67a50 RDI: 0000000000000005
[    2.267624] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000002
[    2.267684] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f15750f7700


Finger prints:
netdev_release:device_release:kobject_put:netdev_run_todo:nsim_destroy