======================================
| [   24.966042][  T305] ==================================================================
| [   24.966434][  T305] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   24.966733][  T305] Read of size 1 at addr ffff888008c2c6ac by task ip/305
| [   24.966961][  T305]
[   24.967065][  T305] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.967070][  T305] Call Trace:
[   24.967075][  T305]  <TASK>
[   24.967077][  T305]  dump_stack_lvl (lib/dump_stack.c:123)
[   24.967083][  T305]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   24.967096][  T305]  ? kobject_put (lib/kobject.c:733)
[   24.967101][  T305]  print_report (mm/kasan/report.c:483)
[   24.967106][  T305]  ? kobject_put (lib/kobject.c:733)
[   24.967109][  T305]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   24.967113][  T305]  ? kobject_put (lib/kobject.c:733)
[   24.967116][  T305]  kasan_report (mm/kasan/report.c:597)
[   24.967119][  T305]  ? kobject_put (lib/kobject.c:733)
[   24.967125][  T305]  kobject_put (lib/kobject.c:733)
[   24.967129][  T305]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   24.967134][  T305]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   24.967138][  T305]  ? generic_xdp_install (net/core/dev.c:11630)
[   24.967141][  T305]  ? __netdev_upper_dev_unlink (net/core/dev.c:8973)
[   24.967149][  T305]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   24.967155][  T305]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   24.967173][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   24.967181][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   24.967189][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   24.967192][  T305]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   24.967194][  T305]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   24.967199][  T305]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   24.967202][  T305]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   24.967206][  T305]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   24.967209][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   24.967216][  T305]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   24.967221][  T305]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   24.967225][  T305]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   24.967231][  T305]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   24.967234][  T305]  ? 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)
[   24.967238][  T305]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   24.967242][  T305]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   24.967246][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   24.967252][  T305]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   24.967256][  T305]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   24.967259][  T305]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   24.967266][  T305]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   24.967270][  T305]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   24.967277][  T305]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   24.967280][  T305]  ? __copy_msghdr (net/socket.c:2556)
[   24.967288][  T305]  ___sys_sendmsg (net/socket.c:2686)
[   24.967291][  T305]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   24.967294][  T305]  ? __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)
[   24.967302][  T305]  ? copy_msghdr_from_user (net/socket.c:2673)
[   24.967307][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   24.967311][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   24.967317][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   24.967320][  T305]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   24.967327][  T305]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   24.967333][  T305]  __sys_sendmsg (net/socket.c:2716)
[   24.967336][  T305]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   24.967340][  T305]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   24.967347][  T305]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   24.967351][  T305]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   24.967358][  T305]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   24.967362][  T305] RIP: 0033:0x7fec98bd91d7
[   24.967367][  T305] 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)
[   24.967369][  T305] RSP: 002b:00007fff0cf4b998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   24.967374][  T305] RAX: ffffffffffffffda RBX: 00007fff0cf4c0c0 RCX: 00007fec98bd91d7
[   24.967376][  T305] RDX: 0000000000000000 RSI: 00007fff0cf4ba00 RDI: 0000000000000005
[   24.967378][  T305] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   24.967379][  T305] R10: 00007fec98ad5f60 R11: 0000000000000246 R12: 0000000000000001
[   24.967381][  T305] R13: 00000000690df028 R14: 0000000000499600 R15: 0000000000000000
| [   24.995580][  T305] refcount_t: underflow; use-after-free.
| [   24.995761][  T305] WARNING: CPU: 1 PID: 305 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   24.996049][  T305] Modules linked in: macvlan veth
| [   24.996742][  T305] Tainted: [B]=BAD_PAGE
[   24.996873][  T305] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.997108][  T305] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   24.997324][  T305] 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 ba 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 ba 	mov    $0xffffffffba258d60,%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
[   24.998030][  T305] RSP: 0018:ffffc900005a71f0 EFLAGS: 00010286
[   24.998257][  T305] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   24.998506][  T305] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   24.998852][  T305] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff757e134
[   24.999138][  T305] R10: 0000000000000003 R11: ffffc900005a6d80 R12: 0000000000000001
[   24.999382][  T305] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   24.999740][  T305] FS:  00007fec98a0b800(0000) GS:ffff88807a272000(0000) knlGS:0000000000000000
[   25.000033][  T305] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.000358][  T305] CR2: 00000000004e53a8 CR3: 000000000de22001 CR4: 0000000000772ef0
[   25.000622][  T305] PKRU: 55555554
[   25.000743][  T305] Call Trace:
[   25.000871][  T305]  <TASK>
[   25.000953][  T305]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   25.001230][  T305]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   25.001410][  T305]  ? generic_xdp_install (net/core/dev.c:11630)
[   25.001589][  T305]  ? __netdev_upper_dev_unlink (net/core/dev.c:8973)
[   25.001793][  T305]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   25.002046][  T305]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   25.002277][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.002438][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.002613][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.002869][  T305]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   25.003030][  T305]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   25.003207][  T305]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   25.003502][  T305]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   25.003668][  T305]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   25.003832][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.003994][  T305]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   25.004263][  T305]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   25.004429][  T305]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   25.004602][  T305]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   25.004761][  T305]  ? 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)
[   25.005013][  T305]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   25.005191][  T305]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   25.005352][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.005519][  T305]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   25.005781][  T305]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   25.005943][  T305]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   25.006119][  T305]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   25.006284][  T305]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   25.006548][  T305]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   25.006748][  T305]  ? __copy_msghdr (net/socket.c:2556)
[   25.006928][  T305]  ___sys_sendmsg (net/socket.c:2686)
[   25.007106][  T305]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   25.007370][  T305]  ? __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)
[   25.007580][  T305]  ? copy_msghdr_from_user (net/socket.c:2673)
[   25.007740][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.007903][  T305]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   25.008179][  T305]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   25.008343][  T305]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   25.008513][  T305]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   25.008683][  T305]  __sys_sendmsg (net/socket.c:2716)
[   25.008939][  T305]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   25.009159][  T305]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   25.009328][  T305]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   25.009494][  T305]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   25.009770][  T305]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   25.009975][  T305] RIP: 0033:0x7fec98bd91d7
[   25.010161][  T305] 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)
[   25.010855][  T305] RSP: 002b:00007fff0cf4b998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.011124][  T305] RAX: ffffffffffffffda RBX: 00007fff0cf4c0c0 RCX: 00007fec98bd91d7
[   25.011419][  T305] RDX: 0000000000000000 RSI: 00007fff0cf4ba00 RDI: 0000000000000005
[   25.011679][  T305] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   25.012025][  T305] R10: 00007fec98ad5f60 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