======================================
| [   19.049911][  T300] netdevsim netdevsim2025 nsim2025p2: renamed from eth0
| [   19.665605][  T255] ------------[ cut here ]------------
| [   19.666229][  T255] kernel BUG at net/core/net-sysfs.c:2246!
| [   19.666746][  T255] Oops: invalid opcode: 0000 [#1] SMP KASAN
[   19.667545][  T255] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.667840][  T255] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[   19.668097][  T255] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 20 48 8b bb b0 fa ff ff e8 9c 81 d1 fe 48 89 ef 5b 5d e9 62 8e d1 fe 90 <0f> 0b e8 0a 65 d8 fe eb bc e8 63 65 d8 fe eb d9 90 f3 0f 1e fa 0f
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 fc                	add    %bh,%ah
   4:	ff                   	lcall  (bad)
   5:	df 48 89             	fisttps -0x77(%rax)
   8:	fa                   	cli
   9:	48 c1 ea 03          	shr    $0x3,%rdx
   d:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  11:	75 20                	jne    0x33
  13:	48 8b bb b0 fa ff ff 	mov    -0x550(%rbx),%rdi
  1a:	e8 9c 81 d1 fe       	call   0xfffffffffed181bb
  1f:	48 89 ef             	mov    %rbp,%rdi
  22:	5b                   	pop    %rbx
  23:	5d                   	pop    %rbp
  24:	e9 62 8e d1 fe       	jmp    0xfffffffffed18e8b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	e8 0a 65 d8 fe       	call   0xfffffffffed8653b
  31:	eb bc                	jmp    0xffffffffffffffef
  33:	e8 63 65 d8 fe       	call   0xfffffffffed8659b
  38:	eb d9                	jmp    0x13
  3a:	90                   	nop
  3b:	f3 0f 1e fa          	endbr64
  3f:	0f                   	.byte 0xf

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	e8 0a 65 d8 fe       	call   0xfffffffffed86511
   7:	eb bc                	jmp    0xffffffffffffffc5
   9:	e8 63 65 d8 fe       	call   0xfffffffffed86571
   e:	eb d9                	jmp    0xffffffffffffffe9
  10:	90                   	nop
  11:	f3 0f 1e fa          	endbr64
  15:	0f                   	.byte 0xf
[   19.668938][  T255] RSP: 0018:ffffc90000b578a8 EFLAGS: 00010297
[   19.669245][  T255] RAX: 0000000000000000 RBX: ffff88800b82a688 RCX: ffffffff8417ab51
[   19.669658][  T255] RDX: 1ffff110017054cc RSI: ffffffff846602c0 RDI: ffff88800b82a660
[   19.670011][  T255] RBP: ffff88800b82a000 R08: 0000000000000001 R09: ffffed10017054d8
[   19.670394][  T255] R10: ffff88800b82a6c3 R11: ffffc90000b575c8 R12: ffff888009460e00
[   19.670768][  T255] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[   19.671111][  T255] FS:  00007f0531a80000(0000) GS:ffff8880e0288000(0000) knlGS:0000000000000000
[   19.671512][  T255] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.671845][  T255] CR2: 000055d46c78e518 CR3: 000000000bfea002 CR4: 0000000000772ef0
[   19.672214][  T255] PKRU: 55555554
[   19.672397][  T255] Call Trace:
[   19.672576][  T255]  <TASK>
[   19.672705][  T255]  device_release (drivers/base/core.c:2570)
[   19.672916][  T255]  kobject_cleanup (lib/kobject.c:693)
[   19.673140][  T255]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   19.673360][  T255]  ? kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 1))
[   19.673592][  T255]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   19.673805][  T255]  ? generic_xdp_install (net/core/dev.c:11630)
[   19.674019][  T255]  ? kfree (mm/slub.c:6630 mm/slub.c:6837)
[   19.674187][  T255] nsim_destroy (drivers/net/netdevsim/netdev.c:1186) netdevsim
[   19.674426][  T255] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[   19.674721][  T255] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1483 drivers/net/netdevsim/dev.c:1707) netdevsim
[   19.674991][  T255] nsim_drv_remove (drivers/net/netdevsim/dev.c:1724) netdevsim
[   19.675213][  T255]  device_release_driver_internal (drivers/base/dd.c:1276 drivers/base/dd.c:1297)
[   19.675476][  T255]  ? klist_put (lib/klist.c:220)
[   19.675666][  T255]  bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586)
[   19.675886][  T255]  device_del (drivers/base/core.c:3879)
[   19.676055][  T255]  ? __device_link_del (drivers/base/core.c:3833)
[   19.676289][  T255]  device_unregister (drivers/base/core.c:3796 drivers/base/core.c:3920)
[   19.676511][  T255] del_device_store (drivers/net/netdevsim/bus.c:248) netdevsim
[   19.676794][  T255]  ? nsim_bus_dev_numvfs_show (drivers/net/netdevsim/bus.c:215) netdevsim
[   19.677062][  T255]  ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/linux/rcupdate.h:1195 fs/sysfs/file.c:24)
[   19.677281][  T255]  ? sysfs_file_kobj (fs/sysfs/file.c:26)
[   19.677484][  T255]  ? sysfs_file_ops (fs/sysfs/file.c:135)
[   19.677710][  T255]  kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356)
[   19.677914][  T255]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[   19.678091][  T255]  ? kernel_write (fs/read_write.c:667)
[   19.678301][  T255]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   19.678514][  T255]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.678741][  T255]  ksys_write (fs/read_write.c:738)
[   19.678891][  T255]  ? __ia32_sys_read (fs/read_write.c:728)
[   19.679106][  T255]  ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:143 ./include/linux/mmap_lock.h:182 arch/x86/mm/fault.c:1338)
[   19.679323][  T255]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   19.679550][  T255]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   19.679903][  T255] RIP: 0033:0x7f0531b80257
[   19.680138][  T255] 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
[   19.680858][  T255] RSP: 002b:00007ffc63f0fbd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   19.681182][  T255] RAX: ffffffffffffffda RBX: 00007f0531c7c780 RCX: 00007f0531b80257
[   19.681477][  T255] RDX: 0000000000000005 RSI: 000055d46c78d510 RDI: 0000000000000001
[   19.681846][  T255] RBP: 0000000000000005 R08: 0000000000000003 R09: 0000000000000000
[   19.682143][  T255] R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000005


Finger prints:
netdev_release:device_release:kobject_cleanup:netdev_run_todo:nsim_destroy