======================================
| [  219.860291][  T573] ==================================================================
| [  219.860767][  T573] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  219.861240][  T573] Read of size 1 at addr ffff88800b65c6ac by task ip/573
| [  219.861575][  T573]
[  219.861738][  T573] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  219.861743][  T573] Call Trace:
[  219.861751][  T573]  <TASK>
[  219.861755][  T573]  dump_stack_lvl (lib/dump_stack.c:123)
[  219.861769][  T573]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  219.861794][  T573]  ? kobject_put (lib/kobject.c:733)
[  219.861801][  T573]  print_report (mm/kasan/report.c:483)
[  219.861806][  T573]  ? kobject_put (lib/kobject.c:733)
[  219.861810][  T573]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  219.861816][  T573]  ? kobject_put (lib/kobject.c:733)
[  219.861821][  T573]  kasan_report (mm/kasan/report.c:597)
[  219.861827][  T573]  ? kobject_put (lib/kobject.c:733)
[  219.861841][  T573]  kobject_put (lib/kobject.c:733)
[  219.861846][  T573]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  219.861858][  T573]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  219.861864][  T573]  ? generic_xdp_install (net/core/dev.c:11630)
[  219.861871][  T573]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  219.861885][  T573]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  219.861894][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.861914][  T573]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  219.861922][  T573]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  219.861959][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.861968][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.861978][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.861984][  T573]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  219.861988][  T573]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  219.861996][  T573]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  219.862002][  T573]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  219.862009][  T573]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  219.862014][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.862026][  T573]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  219.862035][  T573]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  219.862041][  T573]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  219.862053][  T573]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  219.862061][  T573]  ? 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)
[  219.862068][  T573]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  219.862076][  T573]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  219.862083][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.862093][  T573]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  219.862100][  T573]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  219.862106][  T573]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  219.862130][  T573]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  219.862135][  T573]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  219.862152][  T573]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  219.862157][  T573]  ? __copy_msghdr (net/socket.c:2556)
[  219.862173][  T573]  ___sys_sendmsg (net/socket.c:2686)
[  219.862178][  T573]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  219.862182][  T573]  ? __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)
[  219.862203][  T573]  ? copy_msghdr_from_user (net/socket.c:2673)
[  219.862212][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.862220][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.862230][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.862236][  T573]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  219.862256][  T573]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  219.862267][  T573]  __sys_sendmsg (net/socket.c:2716)
[  219.862272][  T573]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  219.862278][  T573]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  219.862293][  T573]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  219.862300][  T573]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  219.862310][  T573]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  219.862324][  T573] RIP: 0033:0x7ff8693551d7
[  219.862333][  T573] 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)
[  219.862338][  T573] RSP: 002b:00007ffed277d0e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  219.862349][  T573] RAX: ffffffffffffffda RBX: 00007ffed277d810 RCX: 00007ff8693551d7
[  219.862353][  T573] RDX: 0000000000000000 RSI: 00007ffed277d150 RDI: 0000000000000005
[  219.862356][  T573] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  219.862359][  T573] R10: 00007ff869251f60 R11: 0000000000000246 R12: 0000000000000002
[  219.862362][  T573] R13: 00000000690df334 R14: 0000000000499600 R15: 0000000000000000
| [  219.888574][  T573] refcount_t: underflow; use-after-free.
| [  219.888849][  T573] WARNING: CPU: 2 PID: 573 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  219.889344][  T573] Modules linked in: act_gact cls_flower sch_ingress 8021q ip6_gre ip6_tunnel tunnel6 gre vrf veth
| [  219.890186][  T573] Tainted: [B]=BAD_PAGE
[  219.890335][  T573] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  219.890565][  T573] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  219.890801][  T573] 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 8f 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 8f 	mov    $0xffffffff8f258d60,%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
[  219.891439][  T573] RSP: 0000:ffffc90000eef1f0 EFLAGS: 00010286
[  219.891679][  T573] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  219.891947][  T573] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  219.892236][  T573] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1f7e134
[  219.892507][  T573] R10: 0000000000000003 R11: ffffc90000eeed80 R12: 0000000000000001
[  219.892768][  T573] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  219.893034][  T573] FS:  00007ff869187800(0000) GS:ffff8880a52f2000(0000) knlGS:0000000000000000
[  219.893363][  T573] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  219.893595][  T573] CR2: 00007ff869459038 CR3: 0000000012534002 CR4: 0000000000772ef0
[  219.893869][  T573] PKRU: 55555554
[  219.894017][  T573] Call Trace:
[  219.894187][  T573]  <TASK>
[  219.894337][  T573]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  219.894625][  T573]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  219.894827][  T573]  ? generic_xdp_install (net/core/dev.c:11630)
[  219.895033][  T573]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  219.895343][  T573]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  219.895576][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.895779][  T573]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  219.895973][  T573]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  219.896219][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.896520][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.896831][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.897043][  T573]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  219.897259][  T573]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  219.897463][  T573]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  219.897808][  T573]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  219.898010][  T573]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  219.898344][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.898563][  T573]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  219.898869][  T573]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  219.899060][  T573]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  219.899271][  T573]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  219.899574][  T573]  ? 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)
[  219.899766][  T573]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  219.899971][  T573]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  219.900268][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.900460][  T573]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  219.900644][  T573]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  219.900829][  T573]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  219.901028][  T573]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  219.901226][  T573]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  219.901410][  T573]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  219.901731][  T573]  ? __copy_msghdr (net/socket.c:2556)
[  219.901934][  T573]  ___sys_sendmsg (net/socket.c:2686)
[  219.902144][  T573]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  219.902442][  T573]  ? __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)
[  219.902783][  T573]  ? copy_msghdr_from_user (net/socket.c:2673)
[  219.903002][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.903212][  T573]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  219.903413][  T573]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  219.903778][  T573]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  219.903995][  T573]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  219.904206][  T573]  __sys_sendmsg (net/socket.c:2716)
[  219.904407][  T573]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  219.904759][  T573]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  219.904959][  T573]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  219.905178][  T573]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  219.905468][  T573]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  219.905702][  T573] RIP: 0033:0x7ff8693551d7
[  219.905894][  T573] 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)
[  219.906616][  T573] RSP: 002b:00007ffed277d0e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  219.906936][  T573] RAX: ffffffffffffffda RBX: 00007ffed277d810 RCX: 00007ff8693551d7
[  219.907346][  T573] RDX: 0000000000000000 RSI: 00007ffed277d150 RDI: 0000000000000005
[  219.907652][  T573] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  219.907955][  T573] R10: 00007ff869251f60 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