======================================
| [  107.945754][ T1117] ==================================================================
| [  107.946162][ T1117] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  107.946504][ T1117] Read of size 1 at addr ffff88800cb5c6c4 by task ip/1117
| [  107.946754][ T1117]
[  107.946871][ T1117] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  107.946875][ T1117] Call Trace:
[  107.946879][ T1117]  <TASK>
[  107.946881][ T1117]  dump_stack_lvl (lib/dump_stack.c:123)
[  107.946888][ T1117]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  107.946906][ T1117]  ? kobject_put (lib/kobject.c:733)
[  107.946912][ T1117]  print_report (mm/kasan/report.c:483)
[  107.946916][ T1117]  ? kobject_put (lib/kobject.c:733)
[  107.946920][ T1117]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  107.946925][ T1117]  ? kobject_put (lib/kobject.c:733)
[  107.946928][ T1117]  kasan_report (mm/kasan/report.c:597)
[  107.946935][ T1117]  ? kobject_put (lib/kobject.c:733)
[  107.946943][ T1117]  kobject_put (lib/kobject.c:733)
[  107.946947][ T1117]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  107.946966][ T1117]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  107.946971][ T1117]  ? generic_xdp_install (net/core/dev.c:11630)
[  107.946974][ T1117]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  107.946978][ T1117]  ? net_generic (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48)
[  107.946993][ T1117]  ? net_generic (./include/net/netns/generic.h:51)
[  107.947000][ T1117]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  107.947012][ T1117]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  107.947039][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.947059][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.947064][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.947069][ T1117]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  107.947076][ T1117]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  107.947082][ T1117]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  107.947088][ T1117]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  107.947095][ T1117]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  107.947099][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.947105][ T1117]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  107.947116][ T1117]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  107.947123][ T1117]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  107.947135][ T1117]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  107.947138][ T1117]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[  107.947141][ T1117]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  107.947146][ T1117]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  107.947149][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.947158][ T1117]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  107.947165][ T1117]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  107.947171][ T1117]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  107.947188][ T1117]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  107.947191][ T1117]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  107.947199][ T1117]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  107.947203][ T1117]  ? __copy_msghdr (net/socket.c:2556)
[  107.947216][ T1117]  ___sys_sendmsg (net/socket.c:2686)
[  107.947220][ T1117]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  107.947226][ T1117]  ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3125)
[  107.947233][ T1117]  ? copy_msghdr_from_user (net/socket.c:2673)
[  107.947237][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.947243][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.947253][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.947259][ T1117]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  107.947278][ T1117]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  107.947285][ T1117]  __sys_sendmsg (net/socket.c:2716)
[  107.947289][ T1117]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  107.947294][ T1117]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  107.947308][ T1117]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  107.947317][ T1117]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  107.947324][ T1117]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  107.947333][ T1117] RIP: 0033:0x7f9d7ad7b1d7
[  107.947342][ T1117] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  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 2e 00 00 00       	mov    $0x2e,%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:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

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:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[  107.947347][ T1117] RSP: 002b:00007ffecaf59258 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  107.947355][ T1117] RAX: ffffffffffffffda RBX: 00007ffecaf59980 RCX: 00007f9d7ad7b1d7
[  107.947359][ T1117] RDX: 0000000000000000 RSI: 00007ffecaf592c0 RDI: 0000000000000005
[  107.947361][ T1117] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[  107.947363][ T1117] R10: 00007f9d7ac77f60 R11: 0000000000000246 R12: 0000000000000001
[  107.947365][ T1117] R13: 00000000690ded99 R14: 0000000000499600 R15: 0000000000000000
| [  107.975976][ T1117] refcount_t: underflow; use-after-free.
| [  107.976352][ T1117] WARNING: CPU: 0 PID: 1117 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  107.976881][ T1117] Modules linked in: ip_gre gre cls_u32 sch_htb
| [  107.977820][ T1117] Tainted: [B]=BAD_PAGE
[  107.978032][ T1117] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  107.978458][ T1117] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  107.978829][ T1117] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba c5 9b e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
All code
========
   0:	cc                   	int3
   1:	38 03                	cmp    %al,(%rbx)
   3:	80 fb 01             	cmp    $0x1,%bl
   6:	0f 87 29 33 d7 fe    	ja     0xfffffffffed73335
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 17 cc 38 03 01 	movb   $0x1,0x338cc17(%rip)        # 0x338cc33
  1c:	90                   	nop
  1d:	48 c7 c7 40 ba c5 9b 	mov    $0xffffffff9bc5ba40,%rdi
  24:	e8 62 d6 16 ff       	call   0xffffffffff16d68b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 33 ff ff ff       	jmp    0xffffffffffffff66
  33:	48 89 df             	mov    %rbx,%rdi
  36:	e8 c0 9d a0 ff       	call   0xffffffffffa09dfb
  3b:	e9 ba fe ff ff       	jmp    0xfffffffffffffefa

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 33 ff ff ff       	jmp    0xffffffffffffff3c
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 c0 9d a0 ff       	call   0xffffffffffa09dd1
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[  107.979810][ T1117] RSP: 0018:ffffc900029a71f0 EFLAGS: 00010286
[  107.980157][ T1117] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  107.980571][ T1117] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  107.980976][ T1117] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3980934
[  107.981364][ T1117] R10: 0000000000000003 R11: ffffc900029a6d80 R12: 0000000000000001
[  107.981825][ T1117] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  107.982239][ T1117] FS:  00007f9d7abad800(0000) GS:ffff8880cef08000(0000) knlGS:0000000000000000
[  107.982712][ T1117] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  107.983062][ T1117] CR2: 000055593daee148 CR3: 000000000e9fd006 CR4: 0000000000772ef0
[  107.983421][ T1117] PKRU: 55555554
[  107.983616][ T1117] Call Trace:
[  107.983858][ T1117]  <TASK>
[  107.984007][ T1117]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  107.984289][ T1117]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  107.984566][ T1117]  ? generic_xdp_install (net/core/dev.c:11630)
[  107.984847][ T1117]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  107.985111][ T1117]  ? net_generic (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48)
[  107.985374][ T1117]  ? net_generic (./include/net/netns/generic.h:51)
[  107.985625][ T1117]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  107.986054][ T1117]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  107.986413][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.986733][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.987022][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.987474][ T1117]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  107.987816][ T1117]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  107.988088][ T1117]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  107.988436][ T1117]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  107.988957][ T1117]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  107.989227][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.989559][ T1117]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  107.989886][ T1117]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  107.990356][ T1117]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  107.990703][ T1117]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  107.990997][ T1117]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[  107.991267][ T1117]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  107.991708][ T1117]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  107.992032][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.992327][ T1117]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  107.992618][ T1117]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  107.992921][ T1117]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  107.993218][ T1117]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  107.993505][ T1117]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  107.993803][ T1117]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  107.994376][ T1117]  ? __copy_msghdr (net/socket.c:2556)
[  107.994652][ T1117]  ___sys_sendmsg (net/socket.c:2686)
[  107.994934][ T1117]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  107.995212][ T1117]  ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3125)
[  107.995743][ T1117]  ? copy_msghdr_from_user (net/socket.c:2673)
[  107.995992][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.996216][ T1117]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  107.996585][ T1117]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  107.996837][ T1117]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  107.997084][ T1117]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  107.997328][ T1117]  __sys_sendmsg (net/socket.c:2716)
[  107.997691][ T1117]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  107.998035][ T1117]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  107.998338][ T1117]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  107.998620][ T1117]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  107.999067][ T1117]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  107.999398][ T1117] RIP: 0033:0x7f9d7ad7b1d7
[  107.999684][ T1117] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  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 2e 00 00 00       	mov    $0x2e,%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:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

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:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[  108.000885][ T1117] RSP: 002b:00007ffecaf59258 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  108.001310][ T1117] RAX: ffffffffffffffda RBX: 00007ffecaf59980 RCX: 00007f9d7ad7b1d7
[  108.001933][ T1117] RDX: 0000000000000000 RSI: 00007ffecaf592c0 RDI: 0000000000000005
[  108.002332][ T1117] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[  108.002805][ T1117] R10: 00007f9d7ac77f60 R11: 0000000000000246 R12: 0000000000000001
[  108.003256][ T1117] R13: 00000000690ded99 R14: 0000000000499600 R15: 0000000000000000
| [  229.074240][  T255] ------------[ cut here ]------------
| [  229.074546][  T255] kernel BUG at net/core/net-sysfs.c:2246!
| [  229.074858][  T255] Oops: invalid opcode: 0000 [#1] SMP KASAN
| [  229.075760][  T255] Tainted: [B]=BAD_PAGE, [W]=WARN
[  229.076016][  T255] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.076304][  T255] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[  229.076552][  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
[  229.077369][  T255] RSP: 0018:ffffc90000b878a8 EFLAGS: 00010297
[  229.077670][  T255] RAX: 0000000000000000 RBX: ffff888009952688 RCX: ffffffff9b77ab51
[  229.077999][  T255] RDX: 1ffff1100132a4cc RSI: ffffffff9bc602c0 RDI: ffff888009952660
[  229.078333][  T255] RBP: ffff888009952000 R08: 0000000000000001 R09: ffffed100132a4d8
[  229.078679][  T255] R10: ffff8880099526c3 R11: ffffffff98e000b0 R12: ffff8880093de800
[  229.079032][  T255] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[  229.079381][  T255] FS:  00007fd70bf49000(0000) GS:ffff8880cf088000(0000) knlGS:0000000000000000
[  229.079866][  T255] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.080164][  T255] CR2: 000055aaaac51530 CR3: 0000000002671002 CR4: 0000000000772ef0
[  229.080556][  T255] PKRU: 55555554
[  229.080750][  T255] Call Trace:
[  229.080907][  T255]  <TASK>
[  229.081024][  T255]  device_release (drivers/base/core.c:2570)
[  229.081259][  T255]  kobject_cleanup (lib/kobject.c:693)
[  229.081495][  T255]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  229.081758][  T255]  ? generic_xdp_install (net/core/dev.c:11630)
[  229.081994][  T255]  ? kfree (mm/slub.c:6630 mm/slub.c:6837)
[  229.082159][  T255] nsim_destroy (drivers/net/netdevsim/netdev.c:1186) netdevsim
[  229.082434][  T255] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[  229.082746][  T255] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1483 drivers/net/netdevsim/dev.c:1707) netdevsim
[  229.083041][  T255] nsim_drv_remove (drivers/net/netdevsim/dev.c:1724) netdevsim
[  229.083277][  T255]  device_release_driver_internal (drivers/base/dd.c:1276 drivers/base/dd.c:1297)
[  229.083584][  T255]  ? klist_put (lib/klist.c:220)
[  229.083778][  T255]  bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586)
[  229.084003][  T255]  device_del (drivers/base/core.c:3879)
[  229.084163][  T255]  ? __device_link_del (drivers/base/core.c:3833)
[  229.084399][  T255]  ? kernfs_fop_write_iter (fs/kernfs/file.c:77 fs/kernfs/file.c:344)
[  229.084640][  T255]  device_unregister (drivers/base/core.c:3796 drivers/base/core.c:3920)
[  229.084865][  T255] del_device_store (drivers/net/netdevsim/bus.c:248) netdevsim
[  229.085168][  T255]  ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/linux/rcupdate.h:1195 fs/sysfs/file.c:24)
[  229.085455][  T255]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  229.085702][  T255]  ? nsim_bus_dev_numvfs_show (drivers/net/netdevsim/bus.c:215) netdevsim
[  229.085994][  T255]  ? sysfs_file_kobj (fs/sysfs/file.c:26)
[  229.086247][  T255]  ? sysfs_file_ops (fs/sysfs/file.c:135)
[  229.086509][  T255]  kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356)
[  229.086758][  T255]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[  229.086945][  T255]  ? kernel_write (fs/read_write.c:667)
[  229.087205][  T255]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[  229.087492][  T255]  ? __handle_mm_fault (mm/memory.c:6454)
[  229.087780][  T255]  ksys_write (fs/read_write.c:738)
[  229.087936][  T255]  ? __ia32_sys_read (fs/read_write.c:728)
[  229.088267][  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)
[  229.088489][  T255]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  229.088708][  T255]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  229.088989][  T255] RIP: 0033:0x7fd70c049257
[  229.089197][  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
[  229.090081][  T255] RSP: 002b:00007fff87f335c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  229.090473][  T255] RAX: ffffffffffffffda RBX: 00007fd70c145780 RCX: 00007fd70c049257
[  229.090840][  T255] RDX: 0000000000000002 RSI: 000055aaaac51530 RDI: 0000000000000001
[  229.091314][  T255] RBP: 0000000000000002 R08: 0000000000000000 R09: 00007fd70c0fbd20
[  229.091648][  T255] R10: 00007fd70c0fbc20 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
print_report:kasan_report:kobject_put:netdev_run_todo:rtnl_dellink
netdev_release:device_release:kobject_cleanup:netdev_run_todo:nsim_destroy
refcount_warn_saturate:netdev_run_todo:rtnl_dellink:rtnetlink_rcv_msg:netlink_rcv_skb