======================================
| [   37.960080][  T433] ==================================================================
| [   37.960429][  T433] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   37.960756][  T433] Read of size 1 at addr ffff888008d8c6ac by task ip/433
| [   37.960974][  T433]
[   37.961074][  T433] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   37.961077][  T433] Call Trace:
[   37.961079][  T433]  <TASK>
[   37.961081][  T433]  dump_stack_lvl (lib/dump_stack.c:123)
[   37.961088][  T433]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   37.961097][  T433]  ? kobject_put (lib/kobject.c:733)
[   37.961101][  T433]  print_report (mm/kasan/report.c:483)
[   37.961104][  T433]  ? kobject_put (lib/kobject.c:733)
[   37.961107][  T433]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   37.961110][  T433]  ? kobject_put (lib/kobject.c:733)
[   37.961113][  T433]  kasan_report (mm/kasan/report.c:597)
[   37.961117][  T433]  ? kobject_put (lib/kobject.c:733)
[   37.961122][  T433]  kobject_put (lib/kobject.c:733)
[   37.961126][  T433]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   37.961130][  T433]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   37.961133][  T433]  ? generic_xdp_install (net/core/dev.c:11630)
[   37.961138][  T433]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   37.961145][  T433]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   37.961150][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.961157][  T433]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   37.961165][  T433]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   37.961184][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   37.961188][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.961194][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   37.961198][  T433]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   37.961200][  T433]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   37.961205][  T433]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   37.961208][  T433]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   37.961212][  T433]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   37.961215][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.961222][  T433]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   37.961226][  T433]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   37.961230][  T433]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   37.961236][  T433]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   37.961239][  T433]  ? 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)
[   37.961242][  T433]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   37.961246][  T433]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   37.961250][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.961256][  T433]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   37.961260][  T433]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   37.961264][  T433]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   37.961272][  T433]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   37.961275][  T433]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   37.961280][  T433]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   37.961284][  T433]  ? __copy_msghdr (net/socket.c:2556)
[   37.961291][  T433]  ___sys_sendmsg (net/socket.c:2686)
[   37.961294][  T433]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   37.961297][  T433]  ? __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)
[   37.961307][  T433]  ? copy_msghdr_from_user (net/socket.c:2673)
[   37.961312][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   37.961316][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.961322][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   37.961325][  T433]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   37.961331][  T433]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   37.961340][  T433]  __sys_sendmsg (net/socket.c:2716)
[   37.961344][  T433]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   37.961350][  T433]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   37.961362][  T433]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   37.961369][  T433]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   37.961376][  T433]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   37.961381][  T433] RIP: 0033:0x7fc451c561d7
[   37.961386][  T433] 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)
[   37.961391][  T433] RSP: 002b:00007ffc2d711608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   37.961397][  T433] RAX: ffffffffffffffda RBX: 00007ffc2d711d30 RCX: 00007fc451c561d7
[   37.961400][  T433] RDX: 0000000000000000 RSI: 00007ffc2d711670 RDI: 0000000000000005
[   37.961401][  T433] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   37.961403][  T433] R10: 00007fc451b52f60 R11: 0000000000000246 R12: 0000000000000002
[   37.961405][  T433] R13: 00000000690def70 R14: 0000000000499600 R15: 0000000000000000
| [   37.987664][  T433] refcount_t: underflow; use-after-free.
| [   37.987902][  T433] WARNING: CPU: 3 PID: 433 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   37.988203][  T433] Modules linked in: act_tunnel_key cls_matchall act_gact cls_flower sch_ingress vxlan ip6_udp_tunnel udp_tunnel vrf veth
| [   37.988932][  T433] Tainted: [B]=BAD_PAGE
[   37.989056][  T433] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   37.989263][  T433] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   37.989487][  T433] 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 25 ba 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 25 ba 	mov    $0xffffffffba258d60,%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
[   37.990071][  T433] RSP: 0018:ffffc9000094f1f0 EFLAGS: 00010286
[   37.990280][  T433] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   37.990535][  T433] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   37.990780][  T433] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff757e134
[   37.991043][  T433] R10: 0000000000000003 R11: ffffc9000094ed80 R12: 0000000000000001
[   37.991291][  T433] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   37.991574][  T433] FS:  00007fc451a88800(0000) GS:ffff88807a372000(0000) knlGS:0000000000000000
[   37.991881][  T433] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.992096][  T433] CR2: 00005622b861b000 CR3: 000000000e37f006 CR4: 0000000000772ef0
[   37.992373][  T433] PKRU: 55555554
[   37.992527][  T433] Call Trace:
[   37.992685][  T433]  <TASK>
[   37.992772][  T433]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   37.992944][  T433]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   37.993143][  T433]  ? generic_xdp_install (net/core/dev.c:11630)
[   37.993307][  T433]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   37.993495][  T433]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   37.993713][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.993881][  T433]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   37.994046][  T433]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   37.994273][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   37.994454][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.994629][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   37.994796][  T433]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   37.994972][  T433]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   37.995144][  T433]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   37.995444][  T433]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   37.995619][  T433]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   37.995787][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.995953][  T433]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   37.996231][  T433]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   37.996541][  T433]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   37.996725][  T433]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   37.996887][  T433]  ? 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)
[   37.997049][  T433]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   37.997241][  T433]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   37.997404][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   37.997574][  T433]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   37.997843][  T433]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   37.998008][  T433]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   37.998277][  T433]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   37.998444][  T433]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   37.998624][  T433]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   37.998925][  T433]  ? __copy_msghdr (net/socket.c:2556)
[   37.999099][  T433]  ___sys_sendmsg (net/socket.c:2686)
[   37.999262][  T433]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   37.999428][  T433]  ? __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)
[   37.999745][  T433]  ? copy_msghdr_from_user (net/socket.c:2673)
[   37.999909][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   38.000079][  T433]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   38.000253][  T433]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   38.000512][  T433]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   38.000684][  T433]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   38.000848][  T433]  __sys_sendmsg (net/socket.c:2716)
[   38.001013][  T433]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   38.001314][  T433]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   38.001489][  T433]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   38.001663][  T433]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   38.001827][  T433]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   38.002131][  T433] RIP: 0033:0x7fc451c561d7
[   38.002316][  T433] 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)
[   38.003032][  T433] RSP: 002b:00007ffc2d711608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   38.003296][  T433] RAX: ffffffffffffffda RBX: 00007ffc2d711d30 RCX: 00007fc451c561d7
[   38.003552][  T433] RDX: 0000000000000000 RSI: 00007ffc2d711670 RDI: 0000000000000005
[   38.003811][  T433] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   38.004058][  T433] R10: 00007fc451b52f60 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