======================================
| [   25.806214][  T288] ==================================================================
| [   25.806663][  T288] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   25.807022][  T288] Read of size 1 at addr ffff88800590a69c by task ip/288
| [   25.807337][  T288]
[   25.807478][  T288] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   25.807482][  T288] Call Trace:
[   25.807485][  T288]  <TASK>
[   25.807488][  T288]  dump_stack_lvl (lib/dump_stack.c:123)
[   25.807496][  T288]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   25.807505][  T288]  ? kobject_put (lib/kobject.c:733)
[   25.807509][  T288]  print_report (mm/kasan/report.c:483)
[   25.807512][  T288]  ? kobject_put (lib/kobject.c:733)
[   25.807515][  T288]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   25.807518][  T288]  ? kobject_put (lib/kobject.c:733)
[   25.807521][  T288]  kasan_report (mm/kasan/report.c:597)
[   25.807524][  T288]  ? kobject_put (lib/kobject.c:733)
[   25.807529][  T288]  kobject_put (lib/kobject.c:733)
[   25.807532][  T288]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   25.807545][  T288]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   25.807550][  T288]  ? generic_xdp_install (net/core/dev.c:11630)
[   25.807554][  T288]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   25.807559][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.807568][  T288]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   25.807574][  T288]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   25.807594][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.807599][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.807604][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.807608][  T288]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   25.807611][  T288]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   25.807615][  T288]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   25.807619][  T288]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   25.807623][  T288]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   25.807626][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.807632][  T288]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   25.807639][  T288]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   25.807642][  T288]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   25.807648][  T288]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   25.807655][  T288]  ? 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)
[   25.807659][  T288]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   25.807663][  T288]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   25.807666][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.807672][  T288]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   25.807676][  T288]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   25.807679][  T288]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   25.807687][  T288]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   25.807690][  T288]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   25.807699][  T288]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   25.807702][  T288]  ? __copy_msghdr (net/socket.c:2556)
[   25.807709][  T288]  ___sys_sendmsg (net/socket.c:2686)
[   25.807711][  T288]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   25.807714][  T288]  ? __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)
[   25.807723][  T288]  ? copy_msghdr_from_user (net/socket.c:2673)
[   25.807727][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.807731][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.807737][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.807740][  T288]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   25.807750][  T288]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   25.807756][  T288]  __sys_sendmsg (net/socket.c:2716)
[   25.807758][  T288]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   25.807762][  T288]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   25.807769][  T288]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   25.807773][  T288]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   25.807779][  T288]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   25.807783][  T288] RIP: 0033:0x7fda657ca1d7
[   25.807789][  T288] 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)
[   25.807793][  T288] RSP: 002b:00007ffdd43c9178 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.807797][  T288] RAX: ffffffffffffffda RBX: 00007ffdd43c98b0 RCX: 00007fda657ca1d7
[   25.807800][  T288] RDX: 0000000000000000 RSI: 00007ffdd43c91e0 RDI: 0000000000000005
[   25.807802][  T288] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   25.807804][  T288] R10: 00007fda656c6510 R11: 0000000000000246 R12: 0000000000000001
[   25.807806][  T288] R13: 00000000690de5b8 R14: 0000000000499600 R15: 0000000000000000
| [   25.847072][  T288] refcount_t: underflow; use-after-free.
| [   25.847308][  T288] WARNING: CPU: 0 PID: 288 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   25.848417][  T288] Modules linked in:
| [   25.849299][  T288] Tainted: [B]=BAD_PAGE
[   25.849513][  T288] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   25.849759][  T288] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   25.850016][  T288] Code: a2 b5 02 80 fb 01 0f 87 db 6e d8 fe 83 e3 01 0f 85 51 ff ff ff c6 05 c2 a2 b5 02 01 90 48 c7 c7 60 a8 45 a6 e8 72 c3 17 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 20 69 a0 ff e9 ba fe ff ff
All code
========
   0:	a2 b5 02 80 fb 01 0f 	movabs %al,0xdb870f01fb8002b5
   7:	87 db 
   9:	6e                   	outsb  %ds:(%rsi),(%dx)
   a:	d8 fe                	fdivr  %st(6),%st
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 c2 a2 b5 02 01 	movb   $0x1,0x2b5a2c2(%rip)        # 0x2b5a2de
  1c:	90                   	nop
  1d:	48 c7 c7 60 a8 45 a6 	mov    $0xffffffffa645a860,%rdi
  24:	e8 72 c3 17 ff       	call   0xffffffffff17c39b
  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 20 69 a0 ff       	call   0xffffffffffa0695b
  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 20 69 a0 ff       	call   0xffffffffffa06931
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[   25.850742][  T288] RSP: 0018:ffffc90000a871f0 EFLAGS: 00010286
[   25.850978][  T288] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   25.851291][  T288] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   25.851631][  T288] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4dbe134
[   25.851981][  T288] R10: 0000000000000003 R11: ffffc90000a86d80 R12: 0000000000000001
[   25.852276][  T288] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   25.852575][  T288] FS:  00007fda655fc800(0000) GS:ffff88808df81000(0000) knlGS:0000000000000000
[   25.852977][  T288] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.853240][  T288] CR2: 00005598169e3dec CR3: 000000000c0b9004 CR4: 0000000000772ef0
[   25.853534][  T288] PKRU: 55555554
[   25.853679][  T288] Call Trace:
[   25.853824][  T288]  <TASK>
[   25.853928][  T288]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   25.854119][  T288]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   25.854334][  T288]  ? generic_xdp_install (net/core/dev.c:11630)
[   25.854538][  T288]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   25.854720][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.855005][  T288]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   25.855199][  T288]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   25.855451][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.855656][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.855945][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.856152][  T288]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   25.856339][  T288]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   25.856587][  T288]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   25.856905][  T288]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   25.857087][  T288]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   25.857300][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.857512][  T288]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   25.857813][  T288]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   25.857997][  T288]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   25.858192][  T288]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   25.858390][  T288]  ? 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)
[   25.858607][  T288]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   25.858784][  T288]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   25.858967][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.859169][  T288]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   25.859488][  T288]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   25.859686][  T288]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   25.859866][  T288]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   25.860057][  T288]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   25.860349][  T288]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   25.860634][  T288]  ? __copy_msghdr (net/socket.c:2556)
[   25.860810][  T288]  ___sys_sendmsg (net/socket.c:2686)
[   25.860995][  T288]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   25.861295][  T288]  ? __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)
[   25.861559][  T288]  ? copy_msghdr_from_user (net/socket.c:2673)
[   25.861735][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.862014][  T288]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.862206][  T288]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.862378][  T288]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   25.862588][  T288]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   25.862870][  T288]  __sys_sendmsg (net/socket.c:2716)
[   25.863051][  T288]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   25.863283][  T288]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   25.863467][  T288]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   25.863751][  T288]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   25.863940][  T288]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   25.864168][  T288] RIP: 0033:0x7fda657ca1d7
[   25.864383][  T288] 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)
[   25.865034][  T288] RSP: 002b:00007ffdd43c9178 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.865414][  T288] RAX: ffffffffffffffda RBX: 00007ffdd43c98b0 RCX: 00007fda657ca1d7
[   25.865716][  T288] RDX: 0000000000000000 RSI: 00007ffdd43c91e0 RDI: 0000000000000005
[   25.865989][  T288] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   25.866364][  T288] R10: 00007fda656c6510 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
refcount_warn_saturate:netdev_run_todo:rtnl_dellink:rtnetlink_rcv_msg:netlink_rcv_skb
print_report:kasan_report:kobject_put:netdev_run_todo:rtnl_dellink