======================================
| [  164.646057][  T945] ==================================================================
| [  164.646452][  T945] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  164.646789][  T945] Read of size 1 at addr ffff88800e6496ac by task ip/945
| [  164.647066][  T945]
[  164.647186][  T945] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  164.647188][  T945] Call Trace:
[  164.647190][  T945]  <TASK>
[  164.647193][  T945]  dump_stack_lvl (lib/dump_stack.c:123)
[  164.647200][  T945]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  164.647208][  T945]  ? kobject_put (lib/kobject.c:733)
[  164.647212][  T945]  print_report (mm/kasan/report.c:483)
[  164.647215][  T945]  ? kobject_put (lib/kobject.c:733)
[  164.647218][  T945]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  164.647222][  T945]  ? kobject_put (lib/kobject.c:733)
[  164.647225][  T945]  kasan_report (mm/kasan/report.c:597)
[  164.647229][  T945]  ? kobject_put (lib/kobject.c:733)
[  164.647234][  T945]  kobject_put (lib/kobject.c:733)
[  164.647237][  T945]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  164.647243][  T945]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  164.647246][  T945]  ? generic_xdp_install (net/core/dev.c:11630)
[  164.647251][  T945]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  164.647258][  T945]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  164.647263][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.647276][  T945]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  164.647285][  T945]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  164.647306][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.647311][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.647317][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.647320][  T945]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  164.647323][  T945]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  164.647327][  T945]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  164.647330][  T945]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  164.647334][  T945]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  164.647337][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.647343][  T945]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  164.647348][  T945]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  164.647351][  T945]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  164.647358][  T945]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  164.647360][  T945]  ? 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)
[  164.647364][  T945]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  164.647368][  T945]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  164.647372][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.647377][  T945]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  164.647382][  T945]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  164.647386][  T945]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  164.647392][  T945]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  164.647395][  T945]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  164.647405][  T945]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  164.647408][  T945]  ? __copy_msghdr (net/socket.c:2556)
[  164.647417][  T945]  ___sys_sendmsg (net/socket.c:2686)
[  164.647420][  T945]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  164.647422][  T945]  ? __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)
[  164.647431][  T945]  ? copy_msghdr_from_user (net/socket.c:2673)
[  164.647436][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.647440][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.647446][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.647449][  T945]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  164.647455][  T945]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  164.647462][  T945]  __sys_sendmsg (net/socket.c:2716)
[  164.647465][  T945]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  164.647469][  T945]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  164.647476][  T945]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  164.647481][  T945]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  164.647487][  T945]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  164.647491][  T945] RIP: 0033:0x7f41502121d7
[  164.647497][  T945] 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)
[  164.647500][  T945] RSP: 002b:00007ffd5860f798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  164.647506][  T945] RAX: ffffffffffffffda RBX: 00007ffd5860fec0 RCX: 00007f41502121d7
[  164.647508][  T945] RDX: 0000000000000000 RSI: 00007ffd5860f800 RDI: 0000000000000005
[  164.647510][  T945] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  164.647512][  T945] R10: 00007f415010ef60 R11: 0000000000000246 R12: 0000000000000002
[  164.647513][  T945] R13: 00000000690dea71 R14: 0000000000499600 R15: 0000000000000000
| [  164.681390][  T945] refcount_t: underflow; use-after-free.
| [  164.681741][  T945] WARNING: CPU: 2 PID: 945 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  164.682231][  T945] Modules linked in: act_mirred act_gact act_police cls_flower sch_ingress vrf veth
| [  164.683358][  T945] Tainted: [B]=BAD_PAGE
[  164.683595][  T945] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  164.683965][  T945] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  164.684566][  T945] Code: 7d 93 02 80 fb 01 0f 87 bb 99 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 a8 7d 93 02 01 90 48 c7 c7 60 8d 65 ac e8 32 bf 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff
All code
========
   0:	7d 93                	jge    0xffffffffffffff95
   2:	02 80 fb 01 0f 87    	add    -0x78f0fe05(%rax),%al
   8:	bb 99 d9 fe 83       	mov    $0x83fed999,%ebx
   d:	e3 01                	jrcxz  0x10
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 a8 7d 93 02 01 	movb   $0x1,0x2937da8(%rip)        # 0x2937dc4
  1c:	90                   	nop
  1d:	48 c7 c7 60 8d 65 ac 	mov    $0xffffffffac658d60,%rdi
  24:	e8 32 bf 18 ff       	call   0xffffffffff18bf5b
  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 b0 63 a1 ff       	call   0xffffffffffa163eb
  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 b0 63 a1 ff       	call   0xffffffffffa163c1
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[  164.685816][  T945] RSP: 0018:ffffc9000115f1f0 EFLAGS: 00010286
[  164.686378][  T945] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  164.687005][  T945] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  164.687467][  T945] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff59fe134
[  164.687903][  T945] R10: 0000000000000003 R11: ffffc9000115ed80 R12: 0000000000000001
[  164.688375][  T945] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  164.689003][  T945] FS:  00007f4150044800(0000) GS:ffff888087ef2000(0000) knlGS:0000000000000000
[  164.689519][  T945] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  164.689903][  T945] CR2: 000055fe7500c408 CR3: 0000000008d4f004 CR4: 0000000000772ef0
[  164.690388][  T945] PKRU: 55555554
[  164.690629][  T945] Call Trace:
[  164.690868][  T945]  <TASK>
[  164.691046][  T945]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  164.691374][  T945]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  164.691668][  T945]  ? generic_xdp_install (net/core/dev.c:11630)
[  164.691980][  T945]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  164.692488][  T945]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  164.692872][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.693190][  T945]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  164.693696][  T945]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  164.694103][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.694424][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.694732][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.695283][  T945]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  164.695609][  T945]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  164.695919][  T945]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  164.696291][  T945]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  164.696797][  T945]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  164.697104][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.697421][  T945]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  164.697720][  T945]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  164.698206][  T945]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  164.698533][  T945]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  164.698833][  T945]  ? 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)
[  164.699146][  T945]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  164.699472][  T945]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  164.699776][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.700094][  T945]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  164.700411][  T945]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  164.700913][  T945]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  164.701224][  T945]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  164.701538][  T945]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  164.702017][  T945]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  164.702566][  T945]  ? __copy_msghdr (net/socket.c:2556)
[  164.703052][  T945]  ___sys_sendmsg (net/socket.c:2686)
[  164.703366][  T945]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  164.703683][  T945]  ? __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)
[  164.704229][  T945]  ? copy_msghdr_from_user (net/socket.c:2673)
[  164.704558][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.704904][  T945]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  164.705217][  T945]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  164.705742][  T945]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  164.706074][  T945]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  164.706397][  T945]  __sys_sendmsg (net/socket.c:2716)
[  164.706715][  T945]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  164.707283][  T945]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  164.707606][  T945]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  164.707971][  T945]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  164.708468][  T945]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  164.708826][  T945] RIP: 0033:0x7f41502121d7
[  164.709158][  T945] 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)
[  164.710401][  T945] RSP: 002b:00007ffd5860f798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  164.710880][  T945] RAX: ffffffffffffffda RBX: 00007ffd5860fec0 RCX: 00007f41502121d7
[  164.711550][  T945] RDX: 0000000000000000 RSI: 00007ffd5860f800 RDI: 0000000000000005
[  164.712025][  T945] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  164.712690][  T945] R10: 00007f415010ef60 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
print_report:kasan_report:kobject_put:netdev_run_todo:rtnl_dellink
refcount_warn_saturate:netdev_run_todo:rtnl_dellink:rtnetlink_rcv_msg:netlink_rcv_skb