======================================
| [   27.713923][  T351] ==================================================================
| [   27.714246][  T351] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   27.714508][  T351] Read of size 1 at addr ffff88800b7996c4 by task ip/351
| [   27.714712][  T351]
[   27.714805][  T351] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.714809][  T351] Call Trace:
[   27.714812][  T351]  <TASK>
[   27.714813][  T351]  dump_stack_lvl (lib/dump_stack.c:123)
[   27.714819][  T351]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   27.714825][  T351]  ? kobject_put (lib/kobject.c:733)
[   27.714829][  T351]  print_report (mm/kasan/report.c:483)
[   27.714835][  T351]  ? kobject_put (lib/kobject.c:733)
[   27.714838][  T351]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   27.714841][  T351]  ? kobject_put (lib/kobject.c:733)
[   27.714844][  T351]  kasan_report (mm/kasan/report.c:597)
[   27.714848][  T351]  ? kobject_put (lib/kobject.c:733)
[   27.714854][  T351]  kobject_put (lib/kobject.c:733)
[   27.714857][  T351]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   27.714863][  T351]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   27.714867][  T351]  ? generic_xdp_install (net/core/dev.c:11630)
[   27.714870][  T351]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   27.714874][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.714880][  T351]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   27.714885][  T351]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.714904][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.714910][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.714915][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.714919][  T351]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   27.714922][  T351]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.714925][  T351]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.714929][  T351]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   27.714933][  T351]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.714936][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.714942][  T351]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   27.714947][  T351]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.714951][  T351]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   27.714959][  T351]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   27.714962][  T351]  ? 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)
[   27.714965][  T351]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   27.714969][  T351]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   27.714973][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.714977][  T351]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   27.714982][  T351]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.714985][  T351]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   27.714990][  T351]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.714993][  T351]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   27.714997][  T351]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   27.714999][  T351]  ? __copy_msghdr (net/socket.c:2556)
[   27.715006][  T351]  ___sys_sendmsg (net/socket.c:2686)
[   27.715009][  T351]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   27.715012][  T351]  ? __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)
[   27.715016][  T351]  ? copy_msghdr_from_user (net/socket.c:2673)
[   27.715020][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.715025][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.715029][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.715033][  T351]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   27.715042][  T351]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.715047][  T351]  __sys_sendmsg (net/socket.c:2716)
[   27.715050][  T351]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   27.715053][  T351]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   27.715059][  T351]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   27.715065][  T351]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   27.715070][  T351]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   27.715077][  T351] RIP: 0033:0x7f2e4d3da1d7
[   27.715084][  T351] 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)
[   27.715087][  T351] RSP: 002b:00007ffc3f0912d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.715092][  T351] RAX: ffffffffffffffda RBX: 00007ffc3f091a10 RCX: 00007f2e4d3da1d7
[   27.715095][  T351] RDX: 0000000000000000 RSI: 00007ffc3f091340 RDI: 0000000000000005
[   27.715096][  T351] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   27.715098][  T351] R10: 00007f2e4d2d6510 R11: 0000000000000246 R12: 0000000000000001
[   27.715100][  T351] R13: 00000000690df4f9 R14: 0000000000499600 R15: 0000000000000000
| [   27.741263][  T351] refcount_t: underflow; use-after-free.
| [   27.741618][  T351] WARNING: CPU: 0 PID: 351 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   27.742133][  T351] Modules linked in: act_mirred act_tunnel_key cls_flower bareudp mpls_gso mpls_iptunnel mpls_router sch_ingress
| [   27.743400][  T351] Tainted: [B]=BAD_PAGE
[   27.743648][  T351] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.744016][  T351] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   27.744389][  T351] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba 65 8f e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
All code
========
   0:	cc                   	int3
   1:	38 03                	cmp    %al,(%rbx)
   3:	80 fb 01             	cmp    $0x1,%bl
   6:	0f 87 29 33 d7 fe    	ja     0xfffffffffed73335
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 17 cc 38 03 01 	movb   $0x1,0x338cc17(%rip)        # 0x338cc33
  1c:	90                   	nop
  1d:	48 c7 c7 40 ba 65 8f 	mov    $0xffffffff8f65ba40,%rdi
  24:	e8 62 d6 16 ff       	call   0xffffffffff16d68b
  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 c0 9d a0 ff       	call   0xffffffffffa09dfb
  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 c0 9d a0 ff       	call   0xffffffffffa09dd1
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[   27.745404][  T351] RSP: 0018:ffffc900005471f0 EFLAGS: 00010286
[   27.745753][  T351] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   27.746172][  T351] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   27.746581][  T351] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff20c0934
[   27.747002][  T351] R10: 0000000000000003 R11: ffffc90000546d80 R12: 0000000000000001
[   27.747424][  T351] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   27.747851][  T351] FS:  00007f2e4d20c800(0000) GS:ffff8880db508000(0000) knlGS:0000000000000000
[   27.748353][  T351] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.748702][  T351] CR2: 00005647f2a37dec CR3: 0000000011207001 CR4: 0000000000772ef0
[   27.749143][  T351] PKRU: 55555554
[   27.749347][  T351] Call Trace:
[   27.749550][  T351]  <TASK>
[   27.749689][  T351]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   27.750145][  T351]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   27.750421][  T351]  ? generic_xdp_install (net/core/dev.c:11630)
[   27.750696][  T351]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   27.750975][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.751418][  T351]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   27.751692][  T351]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.752062][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.752335][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.752761][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.753036][  T351]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   27.753303][  T351]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.753576][  T351]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.754117][  T351]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   27.754392][  T351]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.754665][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.755141][  T351]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   27.755431][  T351]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.755710][  T351]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   27.756009][  T351]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   27.756292][  T351]  ? 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)
[   27.756736][  T351]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   27.757024][  T351]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   27.757293][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.757536][  T351]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   27.757988][  T351]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.758293][  T351]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   27.758582][  T351]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.759043][  T351]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   27.759365][  T351]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   27.759689][  T351]  ? __copy_msghdr (net/socket.c:2556)
[   27.759954][  T351]  ___sys_sendmsg (net/socket.c:2686)
[   27.760352][  T351]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   27.760585][  T351]  ? __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)
[   27.760898][  T351]  ? copy_msghdr_from_user (net/socket.c:2673)
[   27.761172][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.761615][  T351]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.761897][  T351]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.762170][  T351]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   27.762437][  T351]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.762891][  T351]  __sys_sendmsg (net/socket.c:2716)
[   27.763158][  T351]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   27.763491][  T351]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   27.763759][  T351]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   27.764207][  T351]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   27.764474][  T351]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   27.764853][  T351] RIP: 0033:0x7f2e4d3da1d7
[   27.765148][  T351] 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)
[   27.766343][  T351] RSP: 002b:00007ffc3f0912d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.766973][  T351] RAX: ffffffffffffffda RBX: 00007ffc3f091a10 RCX: 00007f2e4d3da1d7
[   27.767375][  T351] RDX: 0000000000000000 RSI: 00007ffc3f091340 RDI: 0000000000000005
[   27.767773][  T351] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   27.768221][  T351] R10: 00007f2e4d2d6510 R11: 0000000000000246 R12: 0000000000000001


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