======================================
| xx__-> [  948.095027][ T9139] netdevsim netdevsim464 eni464np1: renamed from eth0
| [  948.099086][ T9138] netdevsim netdevsim703 eni703np1: renamed from eth1
| [  952.823874][ T9132] BUG: using smp_processor_id() in preemptible [00000000] code: busy_poll_test./9132
| [ 952.824857][ T9132] 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 
[  952.825327][ T9132] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  952.825329][ T9132] Call Trace:
[  952.825332][ T9132]  <TASK>
[ 952.825335][ T9132] dump_stack_lvl (lib/dump_stack.c:123) 
[ 952.825348][ T9132] check_preemption_disabled (lib/smp_processor_id.c:52) 
[ 952.825356][ T9132] 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 
[ 952.825373][ T9132] ? nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 952.825390][ T9132] nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 952.825409][ T9132] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1429) netdevsim 
[ 952.825425][ T9132] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1438 drivers/net/netdevsim/dev.c:1661) netdevsim 
[ 952.825443][ T9132] nsim_drv_remove (drivers/net/netdevsim/dev.c:1678) netdevsim 
[ 952.825458][ T9132] device_release_driver_internal (drivers/base/dd.c:1274 drivers/base/dd.c:1295) 
[ 952.825467][ T9132] ? klist_put (lib/klist.c:220) 
[ 952.825474][ T9132] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586) 
[ 952.825484][ T9132] device_del (drivers/base/core.c:3882) 
[ 952.825492][ T9132] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 952.825507][ T9132] device_unregister (drivers/base/core.c:3799 drivers/base/core.c:3923) 
[ 952.825511][ T9132] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim 
[ 952.825528][ T9132] ? __pfx_del_device_store (drivers/net/netdevsim/bus.c:197) netdevsim 
[ 952.825541][ T9132] ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/linux/rcupdate.h:1155 fs/sysfs/file.c:24) 
[ 952.825549][ T9132] ? sysfs_file_kobj (fs/sysfs/file.c:26) 
[ 952.825557][ T9132] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:138) 
[ 952.825560][ T9132] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 952.825569][ T9132] vfs_write (fs/read_write.c:594 fs/read_write.c:686) 
[ 952.825581][ T9132] ? __pfx_vfs_write (fs/read_write.c:667) 
[ 952.825592][ T9132] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 952.825612][ T9132] ksys_write (fs/read_write.c:738) 
[ 952.825618][ T9132] ? __pfx_ksys_write (fs/read_write.c:728) 
[ 952.825632][ T9132] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 952.825639][ T9132] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  952.825644][ T9132] RIP: 0033:0x7fd742e31b77
[ 952.825649][ T9132] 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
[  952.825652][ T9132] RSP: 002b:00007ffc3f51ef58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  952.825656][ T9132] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fd742e31b77
[  952.825659][ T9132] RDX: 0000000000000004 RSI: 000055fd1e361a30 RDI: 0000000000000001
[  952.825660][ T9132] RBP: 000055fd1e361a30 R08: 0000000000000000 R09: 00007fd742ea44e0
[  952.825662][ T9132] R10: 00007fd742ea43e0 R11: 0000000000000246 R12: 0000000000000004
[  952.825664][ T9132] R13: 00007fd742eed760 R14: 0000000000000004 R15: 00007fd742ee89c0
| [  952.825664][ T9132] R13: 00007fd742eed760 R14: 0000000000000004 R15: 00007fd742ee89c0
| [  952.825682][ T9132]  </TASK>
| [  953.283808][ T9199] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/9199
| [ 953.284576][ T9199] 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 
[  953.285351][ T9199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  953.285354][ T9199] Call Trace:
[  953.285356][ T9199]  <TASK>
[ 953.285359][ T9199] dump_stack_lvl (lib/dump_stack.c:123) 
[ 953.285372][ T9199] check_preemption_disabled (lib/smp_processor_id.c:52) 
[ 953.285381][ T9199] 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 
[ 953.285400][ T9199] ? nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 953.285416][ T9199] nsim_destroy (drivers/net/netdevsim/netdev.c:1062) netdevsim 
[ 953.285433][ T9199] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1429) netdevsim 
[ 953.285448][ T9199] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1438 drivers/net/netdevsim/dev.c:1661) netdevsim 
[ 953.285466][ T9199] nsim_drv_remove (drivers/net/netdevsim/dev.c:1678) netdevsim 
[ 953.285482][ T9199] device_release_driver_internal (drivers/base/dd.c:1274 drivers/base/dd.c:1295) 
[ 953.285489][ T9199] ? klist_put (lib/klist.c:220) 
[ 953.285497][ T9199] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586) 
[ 953.285505][ T9199] device_del (drivers/base/core.c:3882) 
[ 953.285513][ T9199] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 953.285526][ T9199] device_unregister (drivers/base/core.c:3799 drivers/base/core.c:3923) 
[ 953.285530][ T9199] nsim_bus_exit (drivers/net/netdevsim/bus.c:501) netdevsim 
[ 953.285550][ T9199] nsim_module_exit (drivers/net/netdevsim/netdev.c:109) netdevsim 
[ 953.285564][ T9199] __do_sys_delete_module (kernel/module/main.c:805) 
[ 953.285572][ T9199] ? __pfx___do_sys_delete_module (kernel/module/main.c:750) 
[ 953.285584][ T9199] ? __pfx_fput_close_sync (fs/file_table.c:568) 
[ 953.285595][ T9199] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 953.285604][ T9199] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 953.285611][ T9199] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  953.285616][ T9199] RIP: 0033:0x7f7299a665db
[ 953.285621][ T9199] Code: 73 01 c3 48 8b 0d 25 98 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d f5 97 1b 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 25 98 1b 00 	mov    0x1b9825(%rip),%rcx        # 0x1b982f
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 b0 00 00 00       	mov    $0xb0,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d f5 97 1b 00 	mov    0x1b97f5(%rip),%rcx        # 0x1b982f
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d f5 97 1b 00 	mov    0x1b97f5(%rip),%rcx        # 0x1b9805
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  953.285624][ T9199] RSP: 002b:00007ffed9292af8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[  953.285628][ T9199] RAX: ffffffffffffffda RBX: 000055939ab11a90 RCX: 00007f7299a665db
[  953.285630][ T9199] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055939ab11af8
[  953.285632][ T9199] RBP: 000055939ab11a90 R08: 0000000000000000 R09: 0000000000000000
[  953.285634][ T9199] R10: 00007f7299bc5ac0 R11: 0000000000000206 R12: 000055939ab11af8


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