======================================
| [   85.678354][  T708] netdevsim netdevsim10 eni10npf0vf3: renamed from eth7
| [   85.688540][  T707] netdevsim netdevsim10 eni10npf0vf2: renamed from eth6
| [   94.694155][  T228] general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [   94.694508][  T228] KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]
[   94.694930][  T228] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 94.695234][ T228] RIP: 0010:skb_queue_purge_reason (./include/linux/skbuff.h:1846 net/core/skbuff.c:3821) 
[ 94.695420][ T228] Code: f1 f1 f1 f1 c7 40 0c 00 00 00 f3 c7 40 10 f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 d8 00 00 00 48 89 f8 48 c1 e8 03 <80> 3c 10 00 0f 85 bb 02 00 00 48 8b 03 48 39 c3 0f 84 ed 01 00 00
All code
========
   0:	f1                   	int1
   1:	f1                   	int1
   2:	f1                   	int1
   3:	f1                   	int1
   4:	c7 40 0c 00 00 00 f3 	movl   $0xf3000000,0xc(%rax)
   b:	c7 40 10 f3 f3 f3 f3 	movl   $0xf3f3f3f3,0x10(%rax)
  12:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  19:	00 00 
  1b:	48 89 84 24 d8 00 00 	mov    %rax,0xd8(%rsp)
  22:	00 
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
  2a:*	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1)		<-- trapping instruction
  2e:	0f 85 bb 02 00 00    	jne    0x2ef
  34:	48 8b 03             	mov    (%rbx),%rax
  37:	48 39 c3             	cmp    %rax,%rbx
  3a:	0f 84 ed 01 00 00    	je     0x22d

Code starting with the faulting instruction
===========================================
   0:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1)
   4:	0f 85 bb 02 00 00    	jne    0x2c5
   a:	48 8b 03             	mov    (%rbx),%rax
   d:	48 39 c3             	cmp    %rax,%rbx
  10:	0f 84 ed 01 00 00    	je     0x203
[   94.695912][  T228] RSP: 0018:ffffc90000b5f8e0 EFLAGS: 00010202
[   94.696096][  T228] RAX: 0000000000000032 RBX: 0000000000000190 RCX: 0000000000000001
[   94.696299][  T228] RDX: dffffc0000000000 RSI: 0000000000000055 RDI: 0000000000000190
[   94.696504][  T228] RBP: ffffc90000b5f9f0 R08: 0000000000000001 R09: fffffbfff4e068b4
[   94.696710][  T228] R10: 0000000000000003 R11: ffffffffa3600130 R12: ffffed100120f584
[   94.696915][  T228] R13: 0000000000000001 R14: 0000000000000055 R15: 1ffff9200016bf20
[   94.697119][  T228] FS:  00007f00a30ca740(0000) GS:ffff88802f900000(0000) knlGS:0000000000000000
[   94.697368][  T228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   94.697565][  T228] CR2: 000055c7c0028ff0 CR3: 0000000005564004 CR4: 0000000000770ef0
[   94.697781][  T228] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   94.697988][  T228] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   94.698192][  T228] PKRU: 55555554
[   94.698297][  T228] Call Trace:
[   94.698424][  T228]  <TASK>
[ 94.698498][ T228] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[ 94.698605][ T228] ? exc_general_protection (arch/x86/kernel/traps.c:702 arch/x86/kernel/traps.c:644) 
[ 94.698746][ T228] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[ 94.698886][ T228] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 94.699057][ T228] ? skb_queue_purge_reason (./include/linux/skbuff.h:1846 net/core/skbuff.c:3821) 
[ 94.699199][ T228] ? __pfx_skb_queue_purge_reason (net/core/skbuff.c:3817) 
[ 94.699372][ T228] ? unregister_netdevice_queue (net/core/dev.c:11123) 
[ 94.699546][ T228] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 94.699685][ T228] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11112) 
[ 94.699855][ T228] nsim_destroy (drivers/net/netdevsim/netdev.c:653 drivers/net/netdevsim/netdev.c:784) netdevsim
[ 94.700007][ T228] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1426) netdevsim
[ 94.700184][ T228] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:591 drivers/net/netdevsim/dev.c:1655) netdevsim
[ 94.700373][ T228] nsim_drv_remove (drivers/net/netdevsim/dev.c:1675) netdevsim
[ 94.700517][ T228] device_release_driver_internal (drivers/base/dd.c:1272 drivers/base/dd.c:1293) 
[ 94.700689][ T228] ? klist_put (lib/klist.c:220) 
[ 94.700794][ T228] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:581) 
[ 94.700935][ T228] device_del (drivers/base/core.c:3910) 
[ 94.701039][ T228] ? __pfx_device_del (drivers/base/core.c:3864) 
[ 94.701175][ T228] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 94.701319][ T228] ? kernfs_fop_write_iter (fs/kernfs/file.c:326) 
[ 94.701459][ T228] device_unregister (drivers/base/core.c:3827 drivers/base/core.c:3951) 
[ 94.701597][ T228] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim
[ 94.701783][ T228] ? __pfx_del_device_store (drivers/net/netdevsim/bus.c:197) netdevsim
[ 94.701960][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:129) 
[ 94.702096][ T228] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 94.702232][ T228] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:129) 
[ 94.702381][ T228] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 94.702533][ T228] vfs_write (./include/linux/fs.h:2110 fs/read_write.c:497 fs/read_write.c:590) 
[ 94.702648][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/mm.h:700 arch/x86/mm/fault.c:1364) 
[ 94.702789][ T228] ? __pfx_vfs_write (fs/read_write.c:571) 
[ 94.702924][ T228] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 94.703062][ T228] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 94.703199][ T228] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 94.703345][ T228] ksys_write (fs/read_write.c:643) 
[ 94.703448][ T228] ? __pfx_ksys_write (fs/read_write.c:633) 
[ 94.703587][ T228] ? do_user_addr_fault (./include/linux/rcupdate.h:815 ./include/linux/mm.h:702 arch/x86/mm/fault.c:1364) 
[ 94.703724][ T228] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 94.703862][ T228] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   94.704058][  T228] RIP: 0033:0x7f00a320b957
[ 94.704201][ T228] 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
[   94.704707][  T228] RSP: 002b:00007ffee39d2408 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   94.704912][  T228] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f00a320b957
[   94.705118][  T228] RDX: 0000000000000003 RSI: 000055c7c0028ff0 RDI: 0000000000000001
[   94.705320][  T228] RBP: 000055c7c0028ff0 R08: 0000000000000000 R09: 00007f00a327e4e0
[   94.705525][  T228] R10: 00007f00a327e3e0 R11: 0000000000000246 R12: 0000000000000003


Finger prints:
skb_queue_purge_reason:nsim_destroy:__nsim_dev_port_del:nsim_dev_reload_destroy