======================================
| xx__-> [   31.700150][  T379] ==================================================================
| [   31.700510][  T379] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   31.700811][  T379] Read of size 1 at addr ffff8880084096ac by task ip/379
| [   31.701040][  T379]
[   31.701152][  T379] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   31.701154][  T379] Call Trace:
[   31.701156][  T379]  <TASK>
[   31.701158][  T379]  dump_stack_lvl (lib/dump_stack.c:123)
[   31.701167][  T379]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   31.701177][  T379]  ? kobject_put (lib/kobject.c:733)
[   31.701181][  T379]  print_report (mm/kasan/report.c:483)
[   31.701184][  T379]  ? kobject_put (lib/kobject.c:733)
[   31.701188][  T379]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   31.701191][  T379]  ? kobject_put (lib/kobject.c:733)
[   31.701194][  T379]  kasan_report (mm/kasan/report.c:597)
[   31.701198][  T379]  ? kobject_put (lib/kobject.c:733)
[   31.701203][  T379]  kobject_put (lib/kobject.c:733)
[   31.701207][  T379]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   31.701214][  T379]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   31.701217][  T379]  ? generic_xdp_install (net/core/dev.c:11630)
[   31.701222][  T379]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   31.701229][  T379]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   31.701234][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.701251][  T379]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   31.701256][  T379]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   31.701275][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.701280][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.701285][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.701289][  T379]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   31.701292][  T379]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   31.701297][  T379]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   31.701300][  T379]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   31.701304][  T379]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   31.701307][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.701314][  T379]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   31.701318][  T379]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   31.701322][  T379]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   31.701328][  T379]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   31.701332][  T379]  ? 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)
[   31.701336][  T379]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   31.701340][  T379]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   31.701343][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.701349][  T379]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   31.701353][  T379]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   31.701357][  T379]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   31.701369][  T379]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   31.701373][  T379]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   31.701382][  T379]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   31.701385][  T379]  ? __copy_msghdr (net/socket.c:2556)
[   31.701392][  T379]  ___sys_sendmsg (net/socket.c:2686)
[   31.701395][  T379]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   31.701398][  T379]  ? __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)
[   31.701406][  T379]  ? copy_msghdr_from_user (net/socket.c:2673)
[   31.701411][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.701415][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.701421][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.701424][  T379]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   31.701436][  T379]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   31.701442][  T379]  __sys_sendmsg (net/socket.c:2716)
[   31.701445][  T379]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   31.701449][  T379]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   31.701457][  T379]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   31.701460][  T379]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   31.701467][  T379]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   31.701477][  T379] RIP: 0033:0x7f58a20c81d7
[   31.701482][  T379] 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)
[   31.701485][  T379] RSP: 002b:00007fff8126bf58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   31.701491][  T379] RAX: ffffffffffffffda RBX: 00007fff8126c680 RCX: 00007f58a20c81d7
[   31.701493][  T379] RDX: 0000000000000000 RSI: 00007fff8126bfc0 RDI: 0000000000000005
[   31.701495][  T379] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   31.701497][  T379] R10: 00007f58a1fc4f60 R11: 0000000000000246 R12: 0000000000000002
[   31.701499][  T379] R13: 00000000690dfb2d R14: 0000000000499600 R15: 0000000000000000
| [   31.732487][  T379] refcount_t: underflow; use-after-free.
| [   31.732700][  T379] WARNING: CPU: 3 PID: 379 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   31.733025][  T379] Modules linked in: sch_ingress vrf veth
| [   31.733575][  T379] Tainted: [B]=BAD_PAGE
[   31.733712][  T379] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   31.733939][  T379] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   31.734162][  T379] 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 65 a8 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 65 a8 	mov    $0xffffffffa8658d60,%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
[   31.734879][  T379] RSP: 0018:ffffc900009171f0 EFLAGS: 00010286
[   31.735192][  T379] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   31.735454][  T379] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   31.735712][  T379] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff51fe134
[   31.736104][  T379] R10: 0000000000000003 R11: ffffc90000916d80 R12: 0000000000000001
[   31.736392][  T379] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   31.736763][  T379] FS:  00007f58a1efa800(0000) GS:ffff88808bf72000(0000) knlGS:0000000000000000
[   31.737097][  T379] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.737339][  T379] CR2: 00000000004e73d8 CR3: 000000000ca9d004 CR4: 0000000000772ef0
[   31.737721][  T379] PKRU: 55555554
[   31.737873][  T379] Call Trace:
[   31.738009][  T379]  <TASK>
[   31.738099][  T379]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   31.738283][  T379]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   31.738550][  T379]  ? generic_xdp_install (net/core/dev.c:11630)
[   31.738725][  T379]  ? vrf_dellink (drivers/net/vrf.c:1667) vrf
[   31.738903][  T379]  ? vrf_map_unregister_dev (drivers/net/vrf.c:1667) vrf
[   31.739121][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.739396][  T379]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   31.739564][  T379]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   31.739799][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.740084][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.740271][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.740458][  T379]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   31.740649][  T379]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   31.740831][  T379]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   31.741076][  T379]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   31.741266][  T379]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   31.741444][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.741727][  T379]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   31.741916][  T379]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   31.742100][  T379]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   31.742287][  T379]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   31.742560][  T379]  ? 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)
[   31.742740][  T379]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   31.742927][  T379]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   31.743123][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.743315][  T379]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   31.743508][  T379]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   31.743689][  T379]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   31.743881][  T379]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   31.744159][  T379]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   31.744350][  T379]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   31.744577][  T379]  ? __copy_msghdr (net/socket.c:2556)
[   31.744760][  T379]  ___sys_sendmsg (net/socket.c:2686)
[   31.745051][  T379]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   31.745253][  T379]  ? __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)
[   31.745484][  T379]  ? copy_msghdr_from_user (net/socket.c:2673)
[   31.745672][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.745967][  T379]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   31.746153][  T379]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   31.746343][  T379]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   31.746531][  T379]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   31.746825][  T379]  __sys_sendmsg (net/socket.c:2716)
[   31.747011][  T379]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   31.747247][  T379]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   31.747534][  T379]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   31.747718][  T379]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   31.747917][  T379]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   31.748143][  T379] RIP: 0033:0x7f58a20c81d7
[   31.748443][  T379] 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)
[   31.749098][  T379] RSP: 002b:00007fff8126bf58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   31.749482][  T379] RAX: ffffffffffffffda RBX: 00007fff8126c680 RCX: 00007f58a20c81d7
[   31.749772][  T379] RDX: 0000000000000000 RSI: 00007fff8126bfc0 RDI: 0000000000000005
[   31.750053][  T379] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   31.750334][  T379] R10: 00007f58a1fc4f60 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