======================================
| [  184.205036][ T1007] ==================================================================
| [  184.205458][ T1007] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  184.205765][ T1007] Read of size 1 at addr ffff888004a996ac by task ip/1007
| [  184.206024][ T1007]
[  184.206122][ T1007] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.206125][ T1007] Call Trace:
[  184.206127][ T1007]  <TASK>
[  184.206129][ T1007]  dump_stack_lvl (lib/dump_stack.c:123)
[  184.206136][ T1007]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  184.206144][ T1007]  ? kobject_put (lib/kobject.c:733)
[  184.206148][ T1007]  print_report (mm/kasan/report.c:483)
[  184.206151][ T1007]  ? kobject_put (lib/kobject.c:733)
[  184.206154][ T1007]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  184.206157][ T1007]  ? kobject_put (lib/kobject.c:733)
[  184.206161][ T1007]  kasan_report (mm/kasan/report.c:597)
[  184.206164][ T1007]  ? kobject_put (lib/kobject.c:733)
[  184.206169][ T1007]  kobject_put (lib/kobject.c:733)
[  184.206173][ T1007]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  184.206178][ T1007]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  184.206182][ T1007]  ? generic_xdp_install (net/core/dev.c:11630)
[  184.206185][ T1007]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  184.206187][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.206200][ T1007]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  184.206205][ T1007]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  184.206224][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.206229][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.206235][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.206239][ T1007]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  184.206242][ T1007]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  184.206246][ T1007]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  184.206250][ T1007]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  184.206254][ T1007]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  184.206256][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.206263][ T1007]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  184.206269][ T1007]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  184.206272][ T1007]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  184.206279][ T1007]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  184.206281][ T1007]  ? 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)
[  184.206285][ T1007]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  184.206289][ T1007]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  184.206294][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.206299][ T1007]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  184.206303][ T1007]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  184.206307][ T1007]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  184.206316][ T1007]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  184.206320][ T1007]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  184.206327][ T1007]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  184.206330][ T1007]  ? __copy_msghdr (net/socket.c:2556)
[  184.206339][ T1007]  ___sys_sendmsg (net/socket.c:2686)
[  184.206342][ T1007]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  184.206345][ T1007]  ? __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)
[  184.206353][ T1007]  ? copy_msghdr_from_user (net/socket.c:2673)
[  184.206358][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.206362][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.206368][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.206372][ T1007]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  184.206379][ T1007]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  184.206385][ T1007]  __sys_sendmsg (net/socket.c:2716)
[  184.206388][ T1007]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  184.206392][ T1007]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  184.206399][ T1007]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  184.206404][ T1007]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.206410][ T1007]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  184.206417][ T1007] RIP: 0033:0x7f823810b1d7
[  184.206423][ T1007] 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)
[  184.206426][ T1007] RSP: 002b:00007ffdf500e6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  184.206431][ T1007] RAX: ffffffffffffffda RBX: 00007ffdf500ede0 RCX: 00007f823810b1d7
[  184.206433][ T1007] RDX: 0000000000000000 RSI: 00007ffdf500e720 RDI: 0000000000000005
[  184.206435][ T1007] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  184.206437][ T1007] R10: 00007f8238007f60 R11: 0000000000000246 R12: 0000000000000002
[  184.206439][ T1007] R13: 00000000690dea14 R14: 0000000000499600 R15: 0000000000000000
| [  184.234234][ T1007] refcount_t: underflow; use-after-free.
| [  184.234468][ T1007] WARNING: CPU: 2 PID: 1007 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  184.234834][ T1007] Modules linked in: act_mirred cls_matchall sch_red dummy bridge stp llc sch_tbf vrf veth
| [  184.235658][ T1007] Tainted: [B]=BAD_PAGE
[  184.235853][ T1007] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.236152][ T1007] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  184.236550][ T1007] 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 65 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 65 bb 	mov    $0xffffffffbb658d60,%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
[  184.237823][ T1007] RSP: 0018:ffffc90000d271f0 EFLAGS: 00010286
[  184.238223][ T1007] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  184.238919][ T1007] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  184.239309][ T1007] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff77fe134
[  184.239707][ T1007] R10: 0000000000000003 R11: ffffc90000d26d80 R12: 0000000000000001
[  184.240109][ T1007] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  184.240406][ T1007] FS:  00007f8237f3d800(0000) GS:ffff888078ef2000(0000) knlGS:0000000000000000
[  184.240731][ T1007] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.240984][ T1007] CR2: 00005638b54c37c8 CR3: 000000000957a001 CR4: 0000000000772ef0
[  184.241280][ T1007] PKRU: 55555554
[  184.241434][ T1007] Call Trace:
[  184.241586][ T1007]  <TASK>
[  184.241718][ T1007]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  184.242023][ T1007]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  184.242230][ T1007]  ? generic_xdp_install (net/core/dev.c:11630)
[  184.242418][ T1007]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  184.242618][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.242949][ T1007]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  184.243142][ T1007]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  184.243402][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.243711][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.243927][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.244138][ T1007]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  184.244339][ T1007]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  184.244637][ T1007]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  184.244882][ T1007]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  184.245115][ T1007]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  184.245312][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.245628][ T1007]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  184.245849][ T1007]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  184.246049][ T1007]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  184.246257][ T1007]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  184.246547][ T1007]  ? 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)
[  184.246779][ T1007]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  184.247016][ T1007]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  184.247208][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.247508][ T1007]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  184.247717][ T1007]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  184.247930][ T1007]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  184.248131][ T1007]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  184.248443][ T1007]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  184.248660][ T1007]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  184.248914][ T1007]  ? __copy_msghdr (net/socket.c:2556)
[  184.249117][ T1007]  ___sys_sendmsg (net/socket.c:2686)
[  184.249414][ T1007]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  184.249629][ T1007]  ? __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)
[  184.249885][ T1007]  ? copy_msghdr_from_user (net/socket.c:2673)
[  184.250095][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.250393][ T1007]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  184.250588][ T1007]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  184.250812][ T1007]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  184.251119][ T1007]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  184.251325][ T1007]  __sys_sendmsg (net/socket.c:2716)
[  184.251525][ T1007]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  184.251808][ T1007]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  184.252116][ T1007]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  184.252326][ T1007]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.252522][ T1007]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  184.252790][ T1007] RIP: 0033:0x7f823810b1d7
[  184.253002][ T1007] 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)
[  184.253670][ T1007] RSP: 002b:00007ffdf500e6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  184.254082][ T1007] RAX: ffffffffffffffda RBX: 00007ffdf500ede0 RCX: 00007f823810b1d7
[  184.254369][ T1007] RDX: 0000000000000000 RSI: 00007ffdf500e720 RDI: 0000000000000005
[  184.254784][ T1007] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  184.255057][ T1007] R10: 00007f8238007f60 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