======================================
| [   34.121510][  T403] ==================================================================
| [   34.121856][  T403] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   34.122136][  T403] Read of size 1 at addr ffff888004ec96c4 by task ip/403
| [   34.122400][  T403]
[   34.122502][  T403] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   34.122504][  T403] Call Trace:
[   34.122506][  T403]  <TASK>
[   34.122508][  T403]  dump_stack_lvl (lib/dump_stack.c:123)
[   34.122515][  T403]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   34.122521][  T403]  ? kobject_put (lib/kobject.c:733)
[   34.122525][  T403]  print_report (mm/kasan/report.c:483)
[   34.122529][  T403]  ? kobject_put (lib/kobject.c:733)
[   34.122532][  T403]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   34.122535][  T403]  ? kobject_put (lib/kobject.c:733)
[   34.122538][  T403]  kasan_report (mm/kasan/report.c:597)
[   34.122544][  T403]  ? kobject_put (lib/kobject.c:733)
[   34.122553][  T403]  kobject_put (lib/kobject.c:733)
[   34.122558][  T403]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   34.122566][  T403]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   34.122570][  T403]  ? generic_xdp_install (net/core/dev.c:11630)
[   34.122574][  T403]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   34.122578][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.122584][  T403]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   34.122589][  T403]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   34.122609][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.122615][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.122620][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.122623][  T403]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   34.122626][  T403]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   34.122630][  T403]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   34.122634][  T403]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   34.122638][  T403]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   34.122641][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.122647][  T403]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   34.122654][  T403]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   34.122658][  T403]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   34.122665][  T403]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   34.122667][  T403]  ? 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)
[   34.122671][  T403]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   34.122675][  T403]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   34.122678][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.122683][  T403]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   34.122687][  T403]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   34.122690][  T403]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   34.122696][  T403]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   34.122699][  T403]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   34.122704][  T403]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   34.122706][  T403]  ? __copy_msghdr (net/socket.c:2556)
[   34.122713][  T403]  ___sys_sendmsg (net/socket.c:2686)
[   34.122716][  T403]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   34.122719][  T403]  ? __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)
[   34.122723][  T403]  ? copy_msghdr_from_user (net/socket.c:2673)
[   34.122727][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.122732][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.122737][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.122741][  T403]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   34.122750][  T403]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   34.122756][  T403]  __sys_sendmsg (net/socket.c:2716)
[   34.122758][  T403]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   34.122761][  T403]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   34.122768][  T403]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   34.122774][  T403]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   34.122780][  T403]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   34.122783][  T403] RIP: 0033:0x7f37bd3c51d7
[   34.122790][  T403] 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)
[   34.122795][  T403] RSP: 002b:00007fff8041e928 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.122803][  T403] RAX: ffffffffffffffda RBX: 00007fff8041f060 RCX: 00007f37bd3c51d7
[   34.122806][  T403] RDX: 0000000000000000 RSI: 00007fff8041e990 RDI: 0000000000000005
[   34.122809][  T403] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   34.122811][  T403] R10: 00007f37bd2c1510 R11: 0000000000000246 R12: 0000000000000001
[   34.122814][  T403] R13: 00000000690df444 R14: 0000000000499600 R15: 0000000000000000
| [   34.151292][  T403] refcount_t: underflow; use-after-free.
| [   34.151525][  T403] WARNING: CPU: 0 PID: 403 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   34.151840][  T403] Modules linked in: xfrm_interface xfrm_user
| [   34.152453][  T403] Tainted: [B]=BAD_PAGE
[   34.152581][  T403] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   34.152810][  T403] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   34.153074][  T403] 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 e5 b9 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 e5 b9 	mov    $0xffffffffb9e5ba40,%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
[   34.153694][  T403] RSP: 0018:ffffc900006b71f0 EFLAGS: 00010286
[   34.153905][  T403] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   34.154174][  T403] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   34.154452][  T403] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff75c0934
[   34.154707][  T403] R10: 0000000000000003 R11: ffffc900006b6d80 R12: 0000000000000001
[   34.154961][  T403] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   34.155254][  T403] FS:  00007f37bd1f7800(0000) GS:ffff8880b0d08000(0000) knlGS:0000000000000000
[   34.155556][  T403] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   34.155777][  T403] CR2: 00007f37bd5c5050 CR3: 000000000d971004 CR4: 0000000000772ef0
[   34.156050][  T403] PKRU: 55555554
[   34.156183][  T403] Call Trace:
[   34.156327][  T403]  <TASK>
[   34.156413][  T403]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   34.156586][  T403]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   34.156780][  T403]  ? generic_xdp_install (net/core/dev.c:11630)
[   34.156953][  T403]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   34.157136][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.157330][  T403]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   34.157495][  T403]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   34.157724][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.157897][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.158094][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.158276][  T403]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   34.158538][  T403]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   34.158710][  T403]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   34.158911][  T403]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   34.159202][  T403]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   34.159387][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.159557][  T403]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   34.159733][  T403]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   34.159898][  T403]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   34.160179][  T403]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   34.160360][  T403]  ? 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)
[   34.160524][  T403]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   34.160697][  T403]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   34.160958][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.161148][  T403]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   34.161331][  T403]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   34.161492][  T403]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   34.161760][  T403]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   34.161926][  T403]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   34.162116][  T403]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   34.162423][  T403]  ? __copy_msghdr (net/socket.c:2556)
[   34.162588][  T403]  ___sys_sendmsg (net/socket.c:2686)
[   34.162767][  T403]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   34.162942][  T403]  ? __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)
[   34.163309][  T403]  ? copy_msghdr_from_user (net/socket.c:2673)
[   34.163475][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.163655][  T403]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   34.163818][  T403]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   34.164113][  T403]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   34.164305][  T403]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   34.164471][  T403]  __sys_sendmsg (net/socket.c:2716)
[   34.164642][  T403]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   34.164948][  T403]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   34.165131][  T403]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   34.165309][  T403]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   34.165474][  T403]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   34.165785][  T403] RIP: 0033:0x7f37bd3c51d7
[   34.165969][  T403] 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)
[   34.166688][  T403] RSP: 002b:00007fff8041e928 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.166952][  T403] RAX: ffffffffffffffda RBX: 00007fff8041f060 RCX: 00007f37bd3c51d7
[   34.167350][  T403] RDX: 0000000000000000 RSI: 00007fff8041e990 RDI: 0000000000000005
[   34.167600][  T403] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   34.167856][  T403] R10: 00007f37bd2c1510 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