======================================
| [   14.791088][  T229] Cannot link a netdevsim to itself
| [   14.792144][  T229] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).
| [   16.022020][  T229] BUG: using smp_processor_id() in preemptible [00000000] code: peer.sh/229
| [ 16.023032][ T229] caller is nsim_queue_uninit (./include/linux/netdevice.h:3023 (discriminator 3) drivers/net/netdevsim/netdev.c:638 (discriminator 3) drivers/net/netdevsim/netdev.c:917 (discriminator 3)) netdevsim 
[   16.023475][  T229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.023477][  T229] Call Trace:
[   16.023479][  T229]  <TASK>
[ 16.023482][ T229] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.023491][ T229] check_preemption_disabled (lib/smp_processor_id.c:52) 
[ 16.023499][ T229] nsim_queue_uninit (./include/linux/netdevice.h:3023 (discriminator 3) drivers/net/netdevsim/netdev.c:638 (discriminator 3) drivers/net/netdevsim/netdev.c:917 (discriminator 3)) netdevsim 
[ 16.023518][ T229] ? nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 16.023536][ T229] nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 16.023555][ T229] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1429) netdevsim 
[ 16.023571][ T229] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1438 drivers/net/netdevsim/dev.c:1661) netdevsim 
[ 16.023590][ T229] nsim_drv_remove (drivers/net/netdevsim/dev.c:1678) netdevsim 
[ 16.023606][ T229] device_release_driver_internal (drivers/base/dd.c:1274 drivers/base/dd.c:1295) 
[ 16.023613][ T229] ? klist_put (lib/klist.c:220) 
[ 16.023621][ T229] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586) 
[ 16.023631][ T229] device_del (drivers/base/core.c:3882) 
[ 16.023638][ T229] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 16.023652][ T229] device_unregister (drivers/base/core.c:3799 drivers/base/core.c:3923) 
[ 16.023655][ T229] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim 
[ 16.023674][ T229] ? __pfx_del_device_store (drivers/net/netdevsim/bus.c:197) netdevsim 
[ 16.023687][ T229] ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/linux/rcupdate.h:1155 fs/sysfs/file.c:24) 
[ 16.023694][ T229] ? sysfs_file_kobj (fs/sysfs/file.c:26) 
[ 16.023702][ T229] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:138) 
[ 16.023704][ T229] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 16.023714][ T229] vfs_write (fs/read_write.c:593 fs/read_write.c:686) 
[ 16.023725][ T229] ? __pfx_vfs_write (fs/read_write.c:667) 
[ 16.023735][ T229] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.023753][ T229] ksys_write (fs/read_write.c:738) 
[ 16.023758][ T229] ? __pfx_ksys_write (fs/read_write.c:728) 
[ 16.023772][ T229] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.023779][ T229] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.023783][  T229] RIP: 0033:0x7f1e2cfabb77
[ 16.023787][ T229] 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
[   16.023790][  T229] RSP: 002b:00007fffd2619e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   16.023793][  T229] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1e2cfabb77
[   16.023795][  T229] RDX: 0000000000000004 RSI: 0000558c4efc58c0 RDI: 0000000000000001
[   16.023797][  T229] RBP: 0000558c4efc58c0 R08: 0000000000000000 R09: 00007f1e2d01e4e0
[   16.023799][  T229] R10: 00007f1e2d01e3e0 R11: 0000000000000246 R12: 0000000000000004
[   16.023800][  T229] R13: 00007f1e2d067760 R14: 0000000000000004 R15: 00007f1e2d0629c0
| [   16.023800][  T229] R13: 00007f1e2d067760 R14: 0000000000000004 R15: 00007f1e2d0629c0
| [   16.023817][  T229]  </TASK>
| [   16.131912][  T229] BUG: using smp_processor_id() in preemptible [00000000] code: peer.sh/229
| [ 16.132565][ T229] caller is nsim_queue_uninit (./include/linux/netdevice.h:3023 (discriminator 3) drivers/net/netdevsim/netdev.c:638 (discriminator 3) drivers/net/netdevsim/netdev.c:917 (discriminator 3)) netdevsim 
[   16.133014][  T229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.133016][  T229] Call Trace:
[   16.133018][  T229]  <TASK>
[ 16.133020][ T229] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.133028][ T229] check_preemption_disabled (lib/smp_processor_id.c:52) 
[ 16.133037][ T229] nsim_queue_uninit (./include/linux/netdevice.h:3023 (discriminator 3) drivers/net/netdevsim/netdev.c:638 (discriminator 3) drivers/net/netdevsim/netdev.c:917 (discriminator 3)) netdevsim 
[ 16.133056][ T229] ? nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 16.133074][ T229] nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 16.133094][ T229] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1429) netdevsim 
[ 16.133111][ T229] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1438 drivers/net/netdevsim/dev.c:1661) netdevsim 
[ 16.133130][ T229] nsim_drv_remove (drivers/net/netdevsim/dev.c:1678) netdevsim 
[ 16.133146][ T229] device_release_driver_internal (drivers/base/dd.c:1274 drivers/base/dd.c:1295) 
[ 16.133152][ T229] ? klist_put (lib/klist.c:220) 
[ 16.133160][ T229] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586) 
[ 16.133170][ T229] device_del (drivers/base/core.c:3882) 
[ 16.133177][ T229] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 16.133191][ T229] device_unregister (drivers/base/core.c:3799 drivers/base/core.c:3923) 
[ 16.133194][ T229] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim 
[ 16.133212][ T229] ? __pfx_del_device_store (drivers/net/netdevsim/bus.c:197) netdevsim 
[ 16.133225][ T229] ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/linux/rcupdate.h:1155 fs/sysfs/file.c:24) 
[ 16.133231][ T229] ? sysfs_file_kobj (fs/sysfs/file.c:26) 
[ 16.133240][ T229] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:138) 
[ 16.133242][ T229] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 16.133252][ T229] vfs_write (fs/read_write.c:593 fs/read_write.c:686) 
[ 16.133263][ T229] ? __pfx_vfs_write (fs/read_write.c:667) 
[ 16.133273][ T229] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.133294][ T229] ksys_write (fs/read_write.c:738) 
[ 16.133299][ T229] ? __pfx_ksys_write (fs/read_write.c:728) 
[ 16.133313][ T229] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.133321][ T229] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.133324][  T229] RIP: 0033:0x7f1e2cfabb77
[ 16.133328][ T229] 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
[   16.133331][  T229] RSP: 002b:00007fffd2619e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   16.133334][  T229] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1e2cfabb77
[   16.133336][  T229] RDX: 0000000000000004 RSI: 0000558c4efc58c0 RDI: 0000000000000001
[   16.133338][  T229] RBP: 0000558c4efc58c0 R08: 0000000000000000 R09: 00007f1e2d01e4e0
[   16.133340][  T229] R10: 00007f1e2d01e3e0 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
check_preemption_disabled:nsim_queue_uninit:nsim_destroy:__nsim_dev_port_del:nsim_dev_reload_destroy