======================================
| [   52.947334][  T446] ==================================================================
| [   52.947903][  T446] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   52.948332][  T446] Read of size 1 at addr ffff88800fb5c6ac by task ip/446
| [   52.948708][  T446]
[   52.948858][  T446] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   52.948861][  T446] Call Trace:
[   52.948864][  T446]  <TASK>
[   52.948867][  T446]  dump_stack_lvl (lib/dump_stack.c:123)
[   52.948876][  T446]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   52.948886][  T446]  ? kobject_put (lib/kobject.c:733)
[   52.948892][  T446]  print_report (mm/kasan/report.c:483)
[   52.948897][  T446]  ? kobject_put (lib/kobject.c:733)
[   52.948901][  T446]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   52.948905][  T446]  ? kobject_put (lib/kobject.c:733)
[   52.948909][  T446]  kasan_report (mm/kasan/report.c:597)
[   52.948914][  T446]  ? kobject_put (lib/kobject.c:733)
[   52.948923][  T446]  kobject_put (lib/kobject.c:733)
[   52.948929][  T446]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   52.948936][  T446]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   52.948941][  T446]  ? generic_xdp_install (net/core/dev.c:11630)
[   52.948949][  T446]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   52.948959][  T446]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   52.948967][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.948979][  T446]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   52.948987][  T446]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   52.949023][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.949031][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.949042][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.949048][  T446]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   52.949052][  T446]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.949061][  T446]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   52.949067][  T446]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   52.949074][  T446]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.949079][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.949092][  T446]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   52.949099][  T446]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.949105][  T446]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   52.949117][  T446]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   52.949122][  T446]  ? 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)
[   52.949128][  T446]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   52.949134][  T446]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   52.949140][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.949147][  T446]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   52.949154][  T446]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.949160][  T446]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   52.949169][  T446]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.949175][  T446]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   52.949183][  T446]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   52.949188][  T446]  ? __copy_msghdr (net/socket.c:2556)
[   52.949201][  T446]  ___sys_sendmsg (net/socket.c:2686)
[   52.949206][  T446]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   52.949211][  T446]  ? __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)
[   52.949219][  T446]  ? copy_msghdr_from_user (net/socket.c:2673)
[   52.949227][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.949234][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.949244][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.949250][  T446]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   52.949256][  T446]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.949267][  T446]  __sys_sendmsg (net/socket.c:2716)
[   52.949272][  T446]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   52.949279][  T446]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   52.949292][  T446]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.949298][  T446]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   52.949306][  T446]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   52.949312][  T446] RIP: 0033:0x7efe097de1d7
[   52.949319][  T446] 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)
[   52.949324][  T446] RSP: 002b:00007ffe685bfc88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   52.949331][  T446] RAX: ffffffffffffffda RBX: 00007ffe685c03b0 RCX: 00007efe097de1d7
[   52.949334][  T446] RDX: 0000000000000000 RSI: 00007ffe685bfcf0 RDI: 0000000000000005
[   52.949337][  T446] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   52.949340][  T446] R10: 00007efe096daf60 R11: 0000000000000246 R12: 0000000000000002
[   52.949343][  T446] R13: 00000000690dee3a R14: 0000000000499600 R15: 0000000000000000
| [   52.982862][  T446] refcount_t: underflow; use-after-free.
| [   52.983248][  T446] WARNING: CPU: 0 PID: 446 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   52.983580][  T446] Modules linked in: xfrm_user vrf veth
| [   52.984167][  T446] Tainted: [B]=BAD_PAGE
[   52.984304][  T446] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   52.984534][  T446] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   52.984774][  T446] 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 25 a9 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 25 a9 	mov    $0xffffffffa9258d60,%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
[   52.985425][  T446] RSP: 0018:ffffc900005f71f0 EFLAGS: 00010286
[   52.985771][  T446] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   52.986050][  T446] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   52.986319][  T446] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff537e134
[   52.986695][  T446] R10: 0000000000000003 R11: ffffc900005f6d80 R12: 0000000000000001
[   52.986972][  T446] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   52.987334][  T446] FS:  00007efe09610800(0000) GS:ffff88808b1f2000(0000) knlGS:0000000000000000
[   52.987651][  T446] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.987877][  T446] CR2: 00000000004a00a4 CR3: 000000000fb65005 CR4: 0000000000772ef0
[   52.988314][  T446] PKRU: 55555554
[   52.988458][  T446] Call Trace:
[   52.988599][  T446]  <TASK>
[   52.988693][  T446]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   52.988878][  T446]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   52.989162][  T446]  ? generic_xdp_install (net/core/dev.c:11630)
[   52.989341][  T446]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   52.989521][  T446]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   52.989845][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.990036][  T446]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   52.990216][  T446]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   52.990450][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.990724][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.990906][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.991122][  T446]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   52.991303][  T446]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.991577][  T446]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   52.991815][  T446]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   52.992009][  T446]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.992193][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.992471][  T446]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   52.992670][  T446]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.992854][  T446]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   52.993045][  T446]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   52.993315][  T446]  ? 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)
[   52.993501][  T446]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   52.993694][  T446]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   52.993987][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.994174][  T446]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   52.994358][  T446]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.994549][  T446]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   52.994778][  T446]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.994972][  T446]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   52.995155][  T446]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   52.995381][  T446]  ? __copy_msghdr (net/socket.c:2556)
[   52.995680][  T446]  ___sys_sendmsg (net/socket.c:2686)
[   52.995965][  T446]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   52.996157][  T446]  ? __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)
[   52.996389][  T446]  ? copy_msghdr_from_user (net/socket.c:2673)
[   52.996575][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.996755][  T446]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.996948][  T446]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.997127][  T446]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   52.997434][  T446]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.997628][  T446]  __sys_sendmsg (net/socket.c:2716)
[   52.997823][  T446]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   52.998058][  T446]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   52.998245][  T446]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.998429][  T446]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   52.998623][  T446]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   52.998962][  T446] RIP: 0033:0x7efe097de1d7
[   52.999158][  T446] 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)
[   53.000044][  T446] RSP: 002b:00007ffe685bfc88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   53.000324][  T446] RAX: ffffffffffffffda RBX: 00007ffe685c03b0 RCX: 00007efe097de1d7
[   53.000607][  T446] RDX: 0000000000000000 RSI: 00007ffe685bfcf0 RDI: 0000000000000005
[   53.001094][  T446] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   53.001379][  T446] R10: 00007efe096daf60 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