======================================
| [   78.258264][ T1045] ==================================================================
| [   78.258759][ T1045] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   78.259283][ T1045] Read of size 1 at addr ffff8880167126ac by task ip/1045
| [   78.259651][ T1045]
[   78.259840][ T1045] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   78.259844][ T1045] Call Trace:
[   78.259847][ T1045]  <TASK>
[   78.259851][ T1045]  dump_stack_lvl (lib/dump_stack.c:123)
[   78.259860][ T1045]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   78.259869][ T1045]  ? kobject_put (lib/kobject.c:733)
[   78.259875][ T1045]  print_report (mm/kasan/report.c:483)
[   78.259880][ T1045]  ? kobject_put (lib/kobject.c:733)
[   78.259885][ T1045]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   78.259891][ T1045]  ? kobject_put (lib/kobject.c:733)
[   78.259896][ T1045]  kasan_report (mm/kasan/report.c:597)
[   78.259903][ T1045]  ? kobject_put (lib/kobject.c:733)
[   78.259913][ T1045]  kobject_put (lib/kobject.c:733)
[   78.259919][ T1045]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   78.259926][ T1045]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   78.259932][ T1045]  ? generic_xdp_install (net/core/dev.c:11630)
[   78.259939][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.259951][ T1045]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   78.259960][ T1045]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   78.259999][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.260007][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.260018][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.260024][ T1045]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   78.260029][ T1045]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   78.260037][ T1045]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   78.260043][ T1045]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   78.260050][ T1045]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   78.260055][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.260068][ T1045]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   78.260075][ T1045]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   78.260082][ T1045]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   78.260095][ T1045]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   78.260100][ T1045]  ? 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)
[   78.260107][ T1045]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   78.260115][ T1045]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   78.260123][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.260133][ T1045]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   78.260141][ T1045]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   78.260148][ T1045]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   78.260158][ T1045]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   78.260165][ T1045]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   78.260174][ T1045]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   78.260179][ T1045]  ? __copy_msghdr (net/socket.c:2556)
[   78.260194][ T1045]  ___sys_sendmsg (net/socket.c:2686)
[   78.260199][ T1045]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   78.260204][ T1045]  ? __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)
[   78.260213][ T1045]  ? copy_msghdr_from_user (net/socket.c:2673)
[   78.260222][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.260230][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.260241][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.260247][ T1045]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   78.260254][ T1045]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   78.260266][ T1045]  __sys_sendmsg (net/socket.c:2716)
[   78.260271][ T1045]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   78.260277][ T1045]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   78.260292][ T1045]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   78.260299][ T1045]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   78.260307][ T1045]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   78.260314][ T1045] RIP: 0033:0x7feabac5b1d7
[   78.260321][ T1045] 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)
[   78.260326][ T1045] RSP: 002b:00007ffec427adf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   78.260332][ T1045] RAX: ffffffffffffffda RBX: 00007ffec427b520 RCX: 00007feabac5b1d7
[   78.260336][ T1045] RDX: 0000000000000000 RSI: 00007ffec427ae60 RDI: 0000000000000005
[   78.260339][ T1045] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   78.260342][ T1045] R10: 00007feabab57f60 R11: 0000000000000246 R12: 0000000000000002
[   78.260345][ T1045] R13: 00000000690de52d R14: 0000000000499600 R15: 0000000000000000
| [   78.319381][ T1045] refcount_t: underflow; use-after-free.
| [   78.319752][ T1045] WARNING: CPU: 2 PID: 1045 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   78.320289][ T1045] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel dummy act_gact cls_flower sch_ingress bridge stp llc 8021q vrf veth
| [   78.322115][ T1045] Tainted: [B]=BAD_PAGE
[   78.322366][ T1045] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   78.322794][ T1045] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   78.323206][ T1045] 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 85 9d 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 85 9d 	mov    $0xffffffff9d858d60,%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
[   78.324310][ T1045] RSP: 0018:ffffc900015471f0 EFLAGS: 00010286
[   78.324742][ T1045] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   78.325203][ T1045] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   78.325867][ T1045] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3c3e134
[   78.326374][ T1045] R10: 0000000000000003 R11: ffffc90001546d80 R12: 0000000000000001
[   78.327091][ T1045] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   78.327623][ T1045] FS:  00007feabaa8d800(0000) GS:ffff888096cf2000(0000) knlGS:0000000000000000
[   78.328157][ T1045] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   78.328756][ T1045] CR2: 00000000004e5d20 CR3: 00000000166a6002 CR4: 0000000000772ef0
[   78.329222][ T1045] PKRU: 55555554
[   78.329473][ T1045] Call Trace:
[   78.329733][ T1045]  <TASK>
[   78.329901][ T1045]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   78.330418][ T1045]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   78.330757][ T1045]  ? generic_xdp_install (net/core/dev.c:11630)
[   78.331085][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.331414][ T1045]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   78.331948][ T1045]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   78.332364][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.332690][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.333180][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.333510][ T1045]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   78.333820][ T1045]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   78.334133][ T1045]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   78.334517][ T1045]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   78.334830][ T1045]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   78.335138][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.335470][ T1045]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   78.335795][ T1045]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   78.336111][ T1045]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   78.336447][ T1045]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   78.336767][ T1045]  ? 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)
[   78.337263][ T1045]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   78.337588][ T1045]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   78.337877][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.338220][ T1045]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   78.338740][ T1045]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   78.339064][ T1045]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   78.339378][ T1045]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   78.339686][ T1045]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   78.340179][ T1045]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   78.340609][ T1045]  ? __copy_msghdr (net/socket.c:2556)
[   78.340929][ T1045]  ___sys_sendmsg (net/socket.c:2686)
[   78.341244][ T1045]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   78.341760][ T1045]  ? __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)
[   78.342140][ T1045]  ? copy_msghdr_from_user (net/socket.c:2673)
[   78.342443][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.342912][ T1045]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.343205][ T1045]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.343545][ T1045]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   78.343844][ T1045]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   78.344136][ T1045]  __sys_sendmsg (net/socket.c:2716)
[   78.344618][ T1045]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   78.345002][ T1045]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   78.345319][ T1045]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   78.345818][ T1045]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   78.346130][ T1045]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   78.346504][ T1045] RIP: 0033:0x7feabac5b1d7
[   78.346838][ T1045] 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)
[   78.348047][ T1045] RSP: 002b:00007ffec427adf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   78.348677][ T1045] RAX: ffffffffffffffda RBX: 00007ffec427b520 RCX: 00007feabac5b1d7
[   78.349077][ T1045] RDX: 0000000000000000 RSI: 00007ffec427ae60 RDI: 0000000000000005
[   78.349561][ T1045] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   78.350179][ T1045] R10: 00007feabab57f60 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