======================================
| [   83.455873][  T587] ==================================================================
| [   83.456277][  T587] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   83.456657][  T587] Read of size 1 at addr ffff8880051216ac by task ip/587
| [   83.456921][  T587]
[   83.457059][  T587] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   83.457062][  T587] Call Trace:
[   83.457065][  T587]  <TASK>
[   83.457068][  T587]  dump_stack_lvl (lib/dump_stack.c:123)
[   83.457079][  T587]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   83.457098][  T587]  ? kobject_put (lib/kobject.c:733)
[   83.457105][  T587]  print_report (mm/kasan/report.c:483)
[   83.457110][  T587]  ? kobject_put (lib/kobject.c:733)
[   83.457114][  T587]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   83.457120][  T587]  ? kobject_put (lib/kobject.c:733)
[   83.457124][  T587]  kasan_report (mm/kasan/report.c:597)
[   83.457130][  T587]  ? kobject_put (lib/kobject.c:733)
[   83.457137][  T587]  kobject_put (lib/kobject.c:733)
[   83.457140][  T587]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   83.457145][  T587]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   83.457149][  T587]  ? generic_xdp_install (net/core/dev.c:11630)
[   83.457153][  T587]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   83.457160][  T587]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   83.457165][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.457176][  T587]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   83.457181][  T587]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   83.457200][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.457204][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.457210][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.457215][  T587]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   83.457219][  T587]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   83.457227][  T587]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   83.457234][  T587]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   83.457240][  T587]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   83.457245][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.457257][  T587]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   83.457264][  T587]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   83.457271][  T587]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   83.457283][  T587]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   83.457288][  T587]  ? 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)
[   83.457295][  T587]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   83.457302][  T587]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   83.457307][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.457313][  T587]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   83.457317][  T587]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   83.457321][  T587]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   83.457332][  T587]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   83.457335][  T587]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   83.457343][  T587]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   83.457346][  T587]  ? __copy_msghdr (net/socket.c:2556)
[   83.457354][  T587]  ___sys_sendmsg (net/socket.c:2686)
[   83.457358][  T587]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   83.457361][  T587]  ? __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)
[   83.457371][  T587]  ? copy_msghdr_from_user (net/socket.c:2673)
[   83.457376][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.457380][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.457386][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.457390][  T587]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   83.457396][  T587]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   83.457402][  T587]  __sys_sendmsg (net/socket.c:2716)
[   83.457406][  T587]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   83.457410][  T587]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   83.457417][  T587]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   83.457421][  T587]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   83.457427][  T587]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   83.457431][  T587] RIP: 0033:0x7faa433061d7
[   83.457437][  T587] 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)
[   83.457440][  T587] RSP: 002b:00007ffd32443148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   83.457449][  T587] RAX: ffffffffffffffda RBX: 00007ffd32443870 RCX: 00007faa433061d7
[   83.457452][  T587] RDX: 0000000000000000 RSI: 00007ffd324431b0 RDI: 0000000000000005
[   83.457454][  T587] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   83.457455][  T587] R10: 00007faa43202f60 R11: 0000000000000246 R12: 0000000000000002
[   83.457457][  T587] R13: 00000000690dec08 R14: 0000000000499600 R15: 0000000000000000
| [   83.490423][  T587] refcount_t: underflow; use-after-free.
| [   83.490649][  T587] WARNING: CPU: 2 PID: 587 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   83.490987][  T587] Modules linked in: cls_flower act_mirred dummy bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall sch_ingress ip_gre gre vrf veth
| [   83.491908][  T587] Tainted: [B]=BAD_PAGE
[   83.492063][  T587] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   83.492306][  T587] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   83.492548][  T587] 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 e5 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 e5 bb 	mov    $0xffffffffbbe58d60,%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
[   83.493145][  T587] RSP: 0018:ffffc90000fbf1f0 EFLAGS: 00010286
[   83.493438][  T587] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   83.493752][  T587] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   83.494044][  T587] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff78fe134
[   83.494330][  T587] R10: 0000000000000003 R11: ffffc90000fbed80 R12: 0000000000000001
[   83.494620][  T587] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   83.494902][  T587] FS:  00007faa43138800(0000) GS:ffff888072cf2000(0000) knlGS:0000000000000000
[   83.495214][  T587] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.495465][  T587] CR2: 00007f2196306000 CR3: 000000000bf34002 CR4: 0000000000772ef0
[   83.495836][  T587] PKRU: 55555554
[   83.495982][  T587] Call Trace:
[   83.496129][  T587]  <TASK>
[   83.496236][  T587]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   83.496463][  T587]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   83.496647][    C1] ip6_tunnel: h3-gt6 xmit: Local address not yet configured!
[   83.496651][  T587]  ? generic_xdp_install (net/core/dev.c:11630)
[   83.496658][  T587]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   83.497385][  T587]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   83.497722][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.498004][  T587]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   83.498201][  T587]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   83.498464][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.498654][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.498838][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.499024][  T587]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   83.499212][  T587]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   83.499428][  T587]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   83.499755][  T587]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   83.499946][  T587]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   83.500133][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.500361][  T587]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   83.500653][  T587]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   83.500930][  T587]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   83.501126][  T587]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   83.501439][  T587]  ? 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)
[   83.501624][  T587]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   83.501815][  T587]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   83.502002][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.502312][  T587]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   83.502498][  T587]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   83.502689][  T587]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   83.502877][  T587]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   83.503165][  T587]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   83.503392][  T587]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   83.503617][  T587]  ? __copy_msghdr (net/socket.c:2556)
[   83.503807][  T587]  ___sys_sendmsg (net/socket.c:2686)
[   83.504083][  T587]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   83.504297][  T587]  ? __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)
[   83.504558][  T587]  ? copy_msghdr_from_user (net/socket.c:2673)
[   83.504851][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.505040][  T587]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   83.505236][  T587]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   83.505449][  T587]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   83.505733][  T587]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   83.505928][  T587]  __sys_sendmsg (net/socket.c:2716)
[   83.506122][  T587]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   83.506393][  T587]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   83.506714][  T587]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   83.506902][  T587]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   83.507093][  T587]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   83.507334][  T587] RIP: 0033:0x7faa433061d7
[   83.507639][  T587] 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)
[   83.508366][  T587] RSP: 002b:00007ffd32443148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   83.508643][  T587] RAX: ffffffffffffffda RBX: 00007ffd32443870 RCX: 00007faa433061d7
[   83.508912][  T587] RDX: 0000000000000000 RSI: 00007ffd324431b0 RDI: 0000000000000005
[   83.509180][  T587] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   83.509589][  T587] R10: 00007faa43202f60 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