======================================
| [  446.649284][ T1914] ==================================================================
| [  446.649613][ T1914] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  446.649955][ T1914] Read of size 1 at addr ffff888005e046ac by task ip/1914
| [  446.650204][ T1914]
[  446.650298][ T1914] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  446.650301][ T1914] Call Trace:
[  446.650303][ T1914]  <TASK>
[  446.650305][ T1914]  dump_stack_lvl (lib/dump_stack.c:123)
[  446.650312][ T1914]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  446.650318][ T1914]  ? kobject_put (lib/kobject.c:733)
[  446.650322][ T1914]  print_report (mm/kasan/report.c:483)
[  446.650325][ T1914]  ? kobject_put (lib/kobject.c:733)
[  446.650328][ T1914]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  446.650331][ T1914]  ? kobject_put (lib/kobject.c:733)
[  446.650334][ T1914]  kasan_report (mm/kasan/report.c:597)
[  446.650338][ T1914]  ? kobject_put (lib/kobject.c:733)
[  446.650343][ T1914]  kobject_put (lib/kobject.c:733)
[  446.650347][ T1914]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  446.650351][ T1914]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  446.650354][ T1914]  ? generic_xdp_install (net/core/dev.c:11630)
[  446.650359][ T1914]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  446.650365][ T1914]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  446.650370][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.650378][ T1914]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  446.650383][ T1914]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  446.650401][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.650406][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.650415][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.650418][ T1914]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  446.650421][ T1914]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  446.650426][ T1914]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  446.650429][ T1914]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  446.650432][ T1914]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  446.650435][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.650442][ T1914]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  446.650446][ T1914]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  446.650449][ T1914]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  446.650456][ T1914]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  446.650459][ T1914]  ? 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)
[  446.650462][ T1914]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  446.650467][ T1914]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  446.650470][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.650476][ T1914]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  446.650480][ T1914]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  446.650483][ T1914]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  446.650491][ T1914]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  446.650494][ T1914]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  446.650500][ T1914]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  446.650503][ T1914]  ? __copy_msghdr (net/socket.c:2556)
[  446.650511][ T1914]  ___sys_sendmsg (net/socket.c:2686)
[  446.650514][ T1914]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  446.650517][ T1914]  ? __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)
[  446.650524][ T1914]  ? copy_msghdr_from_user (net/socket.c:2673)
[  446.650528][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.650533][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.650538][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.650542][ T1914]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  446.650547][ T1914]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  446.650553][ T1914]  __sys_sendmsg (net/socket.c:2716)
[  446.650556][ T1914]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  446.650560][ T1914]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  446.650568][ T1914]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  446.650571][ T1914]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  446.650579][ T1914]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  446.650585][ T1914] RIP: 0033:0x7f241968c1d7
[  446.650590][ T1914] 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)
[  446.650593][ T1914] RSP: 002b:00007ffca91cedf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  446.650599][ T1914] RAX: ffffffffffffffda RBX: 00007ffca91cf520 RCX: 00007f241968c1d7
[  446.650601][ T1914] RDX: 0000000000000000 RSI: 00007ffca91cee60 RDI: 0000000000000005
[  446.650603][ T1914] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  446.650604][ T1914] R10: 00007f2419588f60 R11: 0000000000000246 R12: 0000000000000002
[  446.650606][ T1914] R13: 00000000690df20a R14: 0000000000499600 R15: 0000000000000000
| [  446.680259][ T1914] refcount_t: underflow; use-after-free.
| [  446.680543][ T1914] WARNING: CPU: 3 PID: 1914 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  446.680878][ T1914] Modules linked in: vrf veth
| [  446.681526][ T1914] Tainted: [B]=BAD_PAGE
[  446.681652][ T1914] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  446.681905][ T1914] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  446.682247][ T1914] 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 45 95 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 45 95 	mov    $0xffffffff95458d60,%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
[  446.683033][ T1914] RSP: 0018:ffffc90002d171f0 EFLAGS: 00010286
[  446.683254][ T1914] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  446.683623][ T1914] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  446.683929][ T1914] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2bbe134
[  446.684213][ T1914] R10: 0000000000000003 R11: ffffc90002d16d80 R12: 0000000000000001
[  446.684478][ T1914] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  446.684779][ T1914] FS:  00007f24194be800(0000) GS:ffff88809f172000(0000) knlGS:0000000000000000
[  446.685108][ T1914] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  446.685321][ T1914] CR2: 00000000004e5ea0 CR3: 0000000005e53002 CR4: 0000000000772ef0
[  446.685599][ T1914] PKRU: 55555554
[  446.685748][ T1914] Call Trace:
[  446.685907][ T1914]  <TASK>
[  446.686013][ T1914]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  446.686202][ T1914]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  446.686381][ T1914]  ? generic_xdp_install (net/core/dev.c:11630)
[  446.686556][ T1914]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[  446.686747][ T1914]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[  446.686987][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.687166][ T1914]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  446.687442][ T1914]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  446.687692][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.688004][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.688286][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.688460][ T1914]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  446.688647][ T1914]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  446.688962][ T1914]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  446.689179][ T1914]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  446.689349][ T1914]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  446.689522][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.689704][ T1914]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  446.689899][ T1914]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  446.690087][ T1914]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  446.690281][ T1914]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  446.690452][ T1914]  ? 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)
[  446.690635][ T1914]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  446.690953][ T1914]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  446.691140][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.691432][ T1914]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  446.691616][ T1914]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  446.691815][ T1914]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  446.692015][ T1914]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  446.692200][ T1914]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  446.692490][ T1914]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  446.692761][ T1914]  ? __copy_msghdr (net/socket.c:2556)
[  446.692959][ T1914]  ___sys_sendmsg (net/socket.c:2686)
[  446.693134][ T1914]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  446.693316][ T1914]  ? __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)
[  446.693550][ T1914]  ? copy_msghdr_from_user (net/socket.c:2673)
[  446.693857][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.694054][ T1914]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  446.694336][ T1914]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  446.694513][ T1914]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  446.694695][ T1914]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  446.694891][ T1914]  __sys_sendmsg (net/socket.c:2716)
[  446.695180][ T1914]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  446.695410][ T1914]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  446.695598][ T1914]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  446.695789][ T1914]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  446.696001][ T1914]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  446.696219][ T1914] RIP: 0033:0x7f241968c1d7
[  446.696412][ T1914] 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)
[  446.697092][ T1914] RSP: 002b:00007ffca91cedf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  446.697377][ T1914] RAX: ffffffffffffffda RBX: 00007ffca91cf520 RCX: 00007f241968c1d7
[  446.697787][ T1914] RDX: 0000000000000000 RSI: 00007ffca91cee60 RDI: 0000000000000005
[  446.698104][ T1914] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  446.698485][ T1914] R10: 00007f2419588f60 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