======================================
| [  139.772364][  T760] ==================================================================
| [  139.772722][  T760] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  139.773014][  T760] Read of size 1 at addr ffff888009ddc6ac by task ip/760
| [  139.773282][  T760]
[  139.773382][  T760] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  139.773385][  T760] Call Trace:
[  139.773389][  T760]  <TASK>
[  139.773391][  T760]  dump_stack_lvl (lib/dump_stack.c:123)
[  139.773398][  T760]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  139.773406][  T760]  ? kobject_put (lib/kobject.c:733)
[  139.773410][  T760]  print_report (mm/kasan/report.c:483)
[  139.773413][  T760]  ? kobject_put (lib/kobject.c:733)
[  139.773416][  T760]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  139.773419][  T760]  ? kobject_put (lib/kobject.c:733)
[  139.773423][  T760]  kasan_report (mm/kasan/report.c:597)
[  139.773426][  T760]  ? kobject_put (lib/kobject.c:733)
[  139.773431][  T760]  kobject_put (lib/kobject.c:733)
[  139.773435][  T760]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  139.773441][  T760]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  139.773444][  T760]  ? generic_xdp_install (net/core/dev.c:11630)
[  139.773450][  T760]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  139.773454][  T760]  ? net_generic (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48)
[  139.773463][  T760]  ? net_generic (./include/net/netns/generic.h:51)
[  139.773470][  T760]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  139.773479][  T760]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  139.773499][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.773508][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.773514][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.773518][  T760]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  139.773520][  T760]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  139.773525][  T760]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  139.773528][  T760]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  139.773532][  T760]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  139.773535][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.773542][  T760]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  139.773547][  T760]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  139.773551][  T760]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  139.773558][  T760]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  139.773560][  T760]  ? 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)
[  139.773564][  T760]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  139.773568][  T760]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  139.773572][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.773577][  T760]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  139.773582][  T760]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  139.773586][  T760]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  139.773593][  T760]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  139.773596][  T760]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  139.773603][  T760]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  139.773606][  T760]  ? __copy_msghdr (net/socket.c:2556)
[  139.773615][  T760]  ___sys_sendmsg (net/socket.c:2686)
[  139.773618][  T760]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  139.773621][  T760]  ? __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)
[  139.773630][  T760]  ? copy_msghdr_from_user (net/socket.c:2673)
[  139.773635][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.773640][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.773645][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.773649][  T760]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  139.773660][  T760]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  139.773666][  T760]  __sys_sendmsg (net/socket.c:2716)
[  139.773669][  T760]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  139.773673][  T760]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  139.773680][  T760]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  139.773685][  T760]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  139.773691][  T760]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  139.773697][  T760] RIP: 0033:0x7fd4e9f801d7
[  139.773702][  T760] 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)
[  139.773705][  T760] RSP: 002b:00007fffda1814b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  139.773709][  T760] RAX: ffffffffffffffda RBX: 00007fffda181be0 RCX: 00007fd4e9f801d7
[  139.773712][  T760] RDX: 0000000000000000 RSI: 00007fffda181520 RDI: 0000000000000005
[  139.773714][  T760] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  139.773715][  T760] R10: 00007fd4e9e7cf60 R11: 0000000000000246 R12: 0000000000000002
[  139.773717][  T760] R13: 00000000690de998 R14: 0000000000499600 R15: 0000000000000000
| [  139.815126][  T760] refcount_t: underflow; use-after-free.
| [  139.815438][  T760] WARNING: CPU: 0 PID: 760 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  139.815983][  T760] Modules linked in: act_mirred cls_flower bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [  139.817526][  T760] Tainted: [B]=BAD_PAGE
[  139.817772][  T760] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  139.818116][  T760] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  139.818420][  T760] 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 c5 bb 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 c5 bb 	mov    $0xffffffffbbc58d60,%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
[  139.819475][  T760] RSP: 0018:ffffc900014871f0 EFLAGS: 00010286
[  139.820043][  T760] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  139.820405][  T760] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  139.820747][  T760] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff78be134
[  139.821488][  T760] R10: 0000000000000003 R11: ffffc90001486d80 R12: 0000000000000001
[  139.821904][  T760] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  139.822382][  T760] FS:  00007fd4e9db2800(0000) GS:ffff888072df2000(0000) knlGS:0000000000000000
[  139.822909][  T760] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  139.823350][  T760] CR2: 000055c5d0972dec CR3: 000000000f087001 CR4: 0000000000772ef0
[  139.823780][  T760] PKRU: 55555554
[  139.823989][  T760] Call Trace:
[  139.824181][  T760]  <TASK>
[  139.824269][  T760]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  139.824533][  T760]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  139.825014][  T760]  ? generic_xdp_install (net/core/dev.c:11630)
[  139.825233][  T760]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  139.825669][  T760]  ? net_generic (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48)
[  139.825986][  T760]  ? net_generic (./include/net/netns/generic.h:51)
[  139.826352][  T760]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  139.826619][  T760]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  139.827013][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.827326][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.827627][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.827898][  T760]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  139.828184][  T760]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  139.828476][  T760]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  139.828759][  T760]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  139.828990][  T760]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  139.829268][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.829716][  T760]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  139.830072][  T760]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  139.830317][  T760]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  139.830614][  T760]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  139.830885][  T760]  ? 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)
[  139.831226][  T760]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  139.831657][  T760]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  139.831971][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.832166][  T760]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  139.832385][  T760]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  139.832878][  T760]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  139.833161][  T760]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  139.833446][  T760]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  139.833887][  T760]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  139.834235][  T760]  ? __copy_msghdr (net/socket.c:2556)
[  139.834502][  T760]  ___sys_sendmsg (net/socket.c:2686)
[  139.834958][  T760]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  139.835453][  T760]  ? __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)
[  139.835799][  T760]  ? copy_msghdr_from_user (net/socket.c:2673)
[  139.836001][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.836265][  T760]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  139.836453][  T760]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  139.836624][  T760]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  139.836802][  T760]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  139.837046][  T760]  __sys_sendmsg (net/socket.c:2716)
[  139.837236][  T760]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  139.837466][  T760]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  139.837641][  T760]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  139.837853][  T760]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  139.838036][  T760]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  139.838276][  T760] RIP: 0033:0x7fd4e9f801d7
[  139.838477][  T760] 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)
[  139.839365][  T760] RSP: 002b:00007fffda1814b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  139.839732][  T760] RAX: ffffffffffffffda RBX: 00007fffda181be0 RCX: 00007fd4e9f801d7
[  139.840035][  T760] RDX: 0000000000000000 RSI: 00007fffda181520 RDI: 0000000000000005
[  139.840314][  T760] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  139.840698][  T760] R10: 00007fd4e9e7cf60 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