======================================
| [   16.692398][  T249] ==================================================================
| [   16.692746][  T249] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   16.693016][  T249] Read of size 1 at addr ffff8880095e169c by task ip/249
| [   16.693272][  T249]
[   16.693365][  T249] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.693368][  T249] Call Trace:
[   16.693370][  T249]  <TASK>
[   16.693372][  T249]  dump_stack_lvl (lib/dump_stack.c:123)
[   16.693379][  T249]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   16.693387][  T249]  ? kobject_put (lib/kobject.c:733)
[   16.693391][  T249]  print_report (mm/kasan/report.c:483)
[   16.693394][  T249]  ? kobject_put (lib/kobject.c:733)
[   16.693396][  T249]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   16.693399][  T249]  ? kobject_put (lib/kobject.c:733)
[   16.693401][  T249]  kasan_report (mm/kasan/report.c:597)
[   16.693405][  T249]  ? kobject_put (lib/kobject.c:733)
[   16.693409][  T249]  kobject_put (lib/kobject.c:733)
[   16.693412][  T249]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   16.693419][  T249]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   16.693423][  T249]  ? generic_xdp_install (net/core/dev.c:11630)
[   16.693426][  T249]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   16.693429][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.693439][  T249]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   16.693445][  T249]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   16.693464][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.693468][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.693474][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.693477][  T249]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   16.693480][  T249]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   16.693484][  T249]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   16.693488][  T249]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   16.693491][  T249]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   16.693494][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.693501][  T249]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   16.693506][  T249]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   16.693510][  T249]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   16.693516][  T249]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   16.693522][  T249]  ? 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)
[   16.693527][  T249]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   16.693531][  T249]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   16.693535][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.693540][  T249]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   16.693544][  T249]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   16.693547][  T249]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   16.693554][  T249]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   16.693557][  T249]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   16.693563][  T249]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   16.693566][  T249]  ? __copy_msghdr (net/socket.c:2556)
[   16.693572][  T249]  ___sys_sendmsg (net/socket.c:2686)
[   16.693575][  T249]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   16.693578][  T249]  ? __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)
[   16.693585][  T249]  ? copy_msghdr_from_user (net/socket.c:2673)
[   16.693589][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.693593][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.693598][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.693601][  T249]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   16.693608][  T249]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   16.693618][  T249]  __sys_sendmsg (net/socket.c:2716)
[   16.693621][  T249]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   16.693627][  T249]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   16.693638][  T249]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   16.693644][  T249]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   16.693650][  T249]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   16.693655][  T249] RIP: 0033:0x7fc4188e31d7
[   16.693660][  T249] 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)
[   16.693663][  T249] RSP: 002b:00007ffcc33524a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   16.693667][  T249] RAX: ffffffffffffffda RBX: 00007ffcc3352bd0 RCX: 00007fc4188e31d7
[   16.693669][  T249] RDX: 0000000000000000 RSI: 00007ffcc3352510 RDI: 0000000000000005
[   16.693671][  T249] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   16.693673][  T249] R10: 00007fc4187dff60 R11: 0000000000000246 R12: 0000000000000001
[   16.693674][  T249] R13: 00000000690df005 R14: 0000000000499600 R15: 0000000000000000
| [   16.723975][  T249] refcount_t: underflow; use-after-free.
| [   16.724218][  T249] WARNING: CPU: 3 PID: 249 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   16.724538][  T249] Modules linked in: netdevsim
| [   16.725105][  T249] Tainted: [B]=BAD_PAGE
[   16.725899][  T249] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.726160][  T249] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   16.726477][  T249] Code: a2 b5 02 80 fb 01 0f 87 db 6e d8 fe 83 e3 01 0f 85 51 ff ff ff c6 05 c2 a2 b5 02 01 90 48 c7 c7 60 a8 05 af e8 72 c3 17 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 20 69 a0 ff e9 ba fe ff ff
All code
========
   0:	a2 b5 02 80 fb 01 0f 	movabs %al,0xdb870f01fb8002b5
   7:	87 db 
   9:	6e                   	outsb  %ds:(%rsi),(%dx)
   a:	d8 fe                	fdivr  %st(6),%st
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 c2 a2 b5 02 01 	movb   $0x1,0x2b5a2c2(%rip)        # 0x2b5a2de
  1c:	90                   	nop
  1d:	48 c7 c7 60 a8 05 af 	mov    $0xffffffffaf05a860,%rdi
  24:	e8 72 c3 17 ff       	call   0xffffffffff17c39b
  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 20 69 a0 ff       	call   0xffffffffffa0695b
  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 20 69 a0 ff       	call   0xffffffffffa06931
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[   16.727153][  T249] RSP: 0018:ffffc900007671f0 EFLAGS: 00010286
[   16.727464][  T249] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   16.727746][  T249] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   16.728024][  T249] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff5f3e134
[   16.728389][  T249] R10: 0000000000000003 R11: ffffc90000766d80 R12: 0000000000000001
[   16.728665][  T249] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   16.728951][  T249] FS:  00007fc418715800(0000) GS:ffff888085501000(0000) knlGS:0000000000000000
[   16.729344][  T249] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   16.729568][  T249] CR2: 00000000004e73b0 CR3: 00000000094d6003 CR4: 0000000000772ef0
[   16.729834][  T249] PKRU: 55555554
[   16.729987][  T249] Call Trace:
[   16.730136][  T249]  <TASK>
[   16.730310][  T249]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   16.730505][  T249]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   16.730693][  T249]  ? generic_xdp_install (net/core/dev.c:11630)
[   16.730869][  T249]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   16.731061][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.731317][  T249]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   16.731506][  T249]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   16.731755][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.731934][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.732141][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.732330][  T249]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   16.732516][  T249]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   16.732701][  T249]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   16.732921][  T249]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   16.733142][  T249]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   16.733336][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.733524][  T249]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   16.733708][  T249]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   16.733899][  T249]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   16.734099][  T249]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   16.734300][  T249]  ? 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)
[   16.734483][  T249]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   16.734676][  T249]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   16.734850][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.735027][  T249]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   16.735235][  T249]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   16.735426][  T249]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   16.735612][  T249]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   16.735787][  T249]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   16.735964][  T249]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   16.736216][  T249]  ? __copy_msghdr (net/socket.c:2556)
[   16.736401][  T249]  ___sys_sendmsg (net/socket.c:2686)
[   16.736583][  T249]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   16.736764][  T249]  ? __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)
[   16.736983][  T249]  ? copy_msghdr_from_user (net/socket.c:2673)
[   16.737179][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.737366][  T249]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.737552][  T249]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.737733][  T249]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   16.737911][  T249]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   16.738098][  T249]  __sys_sendmsg (net/socket.c:2716)
[   16.738298][  T249]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   16.738524][  T249]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   16.738715][  T249]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   16.738992][  T249]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   16.739188][  T249]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   16.739445][  T249] RIP: 0033:0x7fc4188e31d7
[   16.739735][  T249] 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)
[   16.740399][  T249] RSP: 002b:00007ffcc33524a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   16.740780][  T249] RAX: ffffffffffffffda RBX: 00007ffcc3352bd0 RCX: 00007fc4188e31d7
[   16.741053][  T249] RDX: 0000000000000000 RSI: 00007ffcc3352510 RDI: 0000000000000005
[   16.741443][  T249] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   16.741719][  T249] R10: 00007fc4187dff60 R11: 0000000000000246 R12: 0000000000000001
[   16.741987][  T249] R13: 00000000690df005 R14: 0000000000499600 R15: 0000000000000000
| [   18.944826][  T223] ------------[ cut here ]------------
| [   18.945222][  T223] kernel BUG at net/core/net-sysfs.c:2246!
| [   18.945640][  T223] Oops: invalid opcode: 0000 [#1] SMP KASAN
| [   18.946902][  T223] Tainted: [B]=BAD_PAGE, [W]=WARN
[   18.947227][  T223] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.947657][  T223] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[   18.948019][  T223] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 20 48 8b bb d0 fa ff ff e8 9c be cd fe 48 89 ef 5b 5d e9 62 cb cd fe 90 <0f> 0b e8 0a a2 d4 fe eb bc e8 63 a2 d4 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 d0 fa ff ff 	mov    -0x530(%rbx),%rdi
  1a:	e8 9c be cd fe       	call   0xfffffffffecdbebb
  1f:	48 89 ef             	mov    %rbp,%rdi
  22:	5b                   	pop    %rbx
  23:	5d                   	pop    %rbp
  24:	e9 62 cb cd fe       	jmp    0xfffffffffecdcb8b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	e8 0a a2 d4 fe       	call   0xfffffffffed4a23b
  31:	eb bc                	jmp    0xffffffffffffffef
  33:	e8 63 a2 d4 fe       	call   0xfffffffffed4a29b
  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 a2 d4 fe       	call   0xfffffffffed4a211
   7:	eb bc                	jmp    0xffffffffffffffc5
   9:	e8 63 a2 d4 fe       	call   0xfffffffffed4a271
   e:	eb d9                	jmp    0xffffffffffffffe9
  10:	90                   	nop
  11:	f3 0f 1e fa          	endbr64
  15:	0f                   	.byte 0xf
[   18.949254][  T223] RSP: 0018:ffffc90000a878a8 EFLAGS: 00010297
[   18.949690][  T223] RAX: 0000000000000000 RBX: ffff888004e02660 RCX: ffffffffaec4cb51
[   18.950199][  T223] RDX: 1ffff110009c04c8 RSI: ffffffffaf05f0c0 RDI: ffff888004e02640
[   18.950690][  T223] RBP: ffff888004e02000 R08: 0000000000000001 R09: ffffed10009c04d3
[   18.951196][  T223] R10: ffff888004e0269b R11: ffffffffac4000b0 R12: ffff88800a836800
[   18.951705][  T223] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[   18.952207][  T223] FS:  00007f1713d3a000(0000) GS:ffff888085501000(0000) knlGS:0000000000000000
[   18.952810][  T223] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.953230][  T223] CR2: 00007f4daffa15f0 CR3: 000000000c073001 CR4: 0000000000772ef0
[   18.953736][  T223] PKRU: 55555554
[   18.954001][  T223] Call Trace:
[   18.954270][  T223]  <TASK>
[   18.954447][  T223]  device_release (drivers/base/core.c:2570)
[   18.954783][  T223]  kobject_cleanup (lib/kobject.c:693)
[   18.955088][  T223]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   18.955402][  T223]  ? generic_xdp_install (net/core/dev.c:11630)
[   18.955719][  T223]  ? kfree (mm/slub.c:6630 mm/slub.c:6837)
[   18.955970][  T223] nsim_destroy (drivers/net/netdevsim/netdev.c:1186) netdevsim
[   18.956333][  T223] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[   18.956766][  T223] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1483 drivers/net/netdevsim/dev.c:1707) netdevsim
[   18.957192][  T223] nsim_drv_remove (drivers/net/netdevsim/dev.c:1724) netdevsim
[   18.957526][  T223]  device_release_driver_internal (drivers/base/dd.c:1276 drivers/base/dd.c:1297)
[   18.957945][  T223]  ? klist_put (lib/klist.c:220)
[   18.958206][  T223]  bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586)
[   18.958544][  T223]  device_del (drivers/base/core.c:3879)
[   18.958801][  T223]  ? __device_link_del (drivers/base/core.c:3833)
[   18.959129][  T223]  ? kernfs_fop_write_iter (fs/kernfs/file.c:77 fs/kernfs/file.c:344)
[   18.959474][  T223]  device_unregister (drivers/base/core.c:3796 drivers/base/core.c:3920)
[   18.959801][  T223] del_device_store (drivers/net/netdevsim/bus.c:248) netdevsim
[   18.960228][  T223]  ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/linux/rcupdate.h:1195 fs/sysfs/file.c:24)
[   18.960558][  T223]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   18.960900][  T223]  ? nsim_bus_dev_numvfs_show (drivers/net/netdevsim/bus.c:215) netdevsim
[   18.961337][  T223]  ? sysfs_file_kobj (fs/sysfs/file.c:26)
[   18.961676][  T223]  ? sysfs_file_ops (fs/sysfs/file.c:135)
[   18.962013][  T223]  kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356)
[   18.962354][  T223]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[   18.962614][  T223]  ? kernel_write (fs/read_write.c:667)
[   18.962956][  T223]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   18.963299][  T223]  ? __handle_mm_fault (mm/memory.c:6454)
[   18.963637][  T223]  ksys_write (fs/read_write.c:738)
[   18.963906][  T223]  ? __ia32_sys_read (fs/read_write.c:728)
[   18.964234][  T223]  ? 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)
[   18.964575][  T223]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   18.964909][  T223]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   18.965326][  T223] RIP: 0033:0x7f1713e3a257
[   18.965655][  T223] 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
[   18.966805][  T223] RSP: 002b:00007ffd2ca7c1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   18.967319][  T223] RAX: ffffffffffffffda RBX: 00007f1713f36780 RCX: 00007f1713e3a257
[   18.967826][  T223] RDX: 0000000000000004 RSI: 0000558fa68bad60 RDI: 0000000000000001
[   18.968332][  T223] RBP: 0000000000000004 R08: 0000000000000000 R09: 00007f1713eecd20
[   18.968842][  T223] R10: 00007f1713eecc20 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
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
print_report:kasan_report:kobject_put:netdev_run_todo:rtnl_dellink