======================================
| [  157.675874][  T944] ==================================================================
| [  157.676206][  T944] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  157.676496][  T944] Read of size 1 at addr ffff888005cec6ac by task ip/944
| [  157.676744][  T944]
[  157.676843][  T944] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  157.676845][  T944] Call Trace:
[  157.676847][  T944]  <TASK>
[  157.676850][  T944]  dump_stack_lvl (lib/dump_stack.c:123)
[  157.676856][  T944]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  157.676863][  T944]  ? kobject_put (lib/kobject.c:733)
[  157.676867][  T944]  print_report (mm/kasan/report.c:483)
[  157.676870][  T944]  ? kobject_put (lib/kobject.c:733)
[  157.676874][  T944]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  157.676877][  T944]  ? kobject_put (lib/kobject.c:733)
[  157.676880][  T944]  kasan_report (mm/kasan/report.c:597)
[  157.676884][  T944]  ? kobject_put (lib/kobject.c:733)
[  157.676889][  T944]  kobject_put (lib/kobject.c:733)
[  157.676893][  T944]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  157.676898][  T944]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  157.676902][  T944]  ? generic_xdp_install (net/core/dev.c:11630)
[  157.676905][  T944]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  157.676912][  T944]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  157.676917][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.676926][  T944]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  157.676932][  T944]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.676952][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.676956][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.676962][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.676966][  T944]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  157.676968][  T944]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.676973][  T944]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.676976][  T944]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  157.676980][  T944]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.676983][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.676989][  T944]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  157.676995][  T944]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.676998][  T944]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  157.677005][  T944]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  157.677008][  T944]  ? 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)
[  157.677011][  T944]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  157.677015][  T944]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  157.677019][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.677025][  T944]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  157.677029][  T944]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.677033][  T944]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  157.677040][  T944]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.677044][  T944]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  157.677051][  T944]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  157.677054][  T944]  ? __copy_msghdr (net/socket.c:2556)
[  157.677062][  T944]  ___sys_sendmsg (net/socket.c:2686)
[  157.677065][  T944]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  157.677068][  T944]  ? __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)
[  157.677076][  T944]  ? copy_msghdr_from_user (net/socket.c:2673)
[  157.677081][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.677085][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.677091][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.677094][  T944]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  157.677102][  T944]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.677109][  T944]  __sys_sendmsg (net/socket.c:2716)
[  157.677112][  T944]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  157.677116][  T944]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  157.677123][  T944]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  157.677127][  T944]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  157.677134][  T944]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  157.677138][  T944] RIP: 0033:0x7f5ff73541d7
[  157.677143][  T944] 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)
[  157.677146][  T944] RSP: 002b:00007ffdad3b5cc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  157.677150][  T944] RAX: ffffffffffffffda RBX: 00007ffdad3b63f0 RCX: 00007f5ff73541d7
[  157.677152][  T944] RDX: 0000000000000000 RSI: 00007ffdad3b5d30 RDI: 0000000000000005
[  157.677154][  T944] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  157.677156][  T944] R10: 00007f5ff7250f60 R11: 0000000000000246 R12: 0000000000000002
[  157.677157][  T944] R13: 00000000690df587 R14: 0000000000499600 R15: 0000000000000000
| [  157.704070][  T944] refcount_t: underflow; use-after-free.
| [  157.704269][  T944] WARNING: CPU: 1 PID: 944 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  157.704585][  T944] Modules linked in: act_mirred act_gact act_police cls_flower sch_ingress vrf veth
| [  157.705631][  T944] Tainted: [B]=BAD_PAGE
[  157.705771][  T944] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  157.705985][  T944] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  157.706215][  T944] 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 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 c5 9d 	mov    $0xffffffff9dc58d60,%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
[  157.706838][  T944] RSP: 0018:ffffc900011bf1f0 EFLAGS: 00010286
[  157.707063][  T944] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  157.707314][  T944] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  157.707597][  T944] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3cbe134
[  157.707861][  T944] R10: 0000000000000003 R11: ffffc900011bed80 R12: 0000000000000001
[  157.708116][  T944] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  157.708367][  T944] FS:  00007f5ff7186800(0000) GS:ffff888096872000(0000) knlGS:0000000000000000
[  157.708680][  T944] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  157.708902][  T944] CR2: 00007f8fa71d8000 CR3: 000000000ab29001 CR4: 0000000000772ef0
[  157.709173][  T944] PKRU: 55555554
[  157.709311][  T944] Call Trace:
[  157.709443][  T944]  <TASK>
[  157.709556][  T944]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  157.709731][  T944]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  157.709915][  T944]  ? generic_xdp_install (net/core/dev.c:11630)
[  157.710087][  T944]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  157.710276][  T944]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  157.710488][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.710693][  T944]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  157.710871][  T944]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.711113][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.711281][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.711446][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.711632][  T944]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  157.711797][  T944]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.711975][  T944]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.712287][  T944]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  157.712462][  T944]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.712650][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.712818][  T944]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  157.712994][  T944]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.713165][  T944]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  157.713330][  T944]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  157.713517][  T944]  ? 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)
[  157.713692][  T944]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  157.713867][  T944]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  157.714040][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.714203][  T944]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  157.714365][  T944]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.714548][  T944]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  157.714718][  T944]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.714920][  T944]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  157.715096][  T944]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  157.715302][  T944]  ? __copy_msghdr (net/socket.c:2556)
[  157.715480][  T944]  ___sys_sendmsg (net/socket.c:2686)
[  157.715659][  T944]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  157.715832][  T944]  ? __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)
[  157.716051][  T944]  ? copy_msghdr_from_user (net/socket.c:2673)
[  157.716229][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.716396][  T944]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.716583][  T944]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.716746][  T944]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  157.716924][  T944]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.717101][  T944]  __sys_sendmsg (net/socket.c:2716)
[  157.717263][  T944]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  157.717479][  T944]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  157.717662][  T944]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  157.717835][  T944]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  157.718012][  T944]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  157.718212][  T944] RIP: 0033:0x7f5ff73541d7
[  157.718395][  T944] 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)
[  157.719035][  T944] RSP: 002b:00007ffdad3b5cc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  157.719286][  T944] RAX: ffffffffffffffda RBX: 00007ffdad3b63f0 RCX: 00007f5ff73541d7
[  157.719562][  T944] RDX: 0000000000000000 RSI: 00007ffdad3b5d30 RDI: 0000000000000005
[  157.719839][  T944] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  157.720113][  T944] R10: 00007f5ff7250f60 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