======================================
| [  112.915987][  T848] ==================================================================
| [  112.916297][  T848] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  112.916579][  T848] Read of size 1 at addr ffff8880051116ac by task ip/848
| [  112.916812][  T848]
[  112.916915][  T848] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  112.916918][  T848] Call Trace:
[  112.916920][  T848]  <TASK>
[  112.916922][  T848]  dump_stack_lvl (lib/dump_stack.c:123)
[  112.916930][  T848]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  112.916937][  T848]  ? kobject_put (lib/kobject.c:733)
[  112.916941][  T848]  print_report (mm/kasan/report.c:483)
[  112.916944][  T848]  ? kobject_put (lib/kobject.c:733)
[  112.916948][  T848]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  112.916951][  T848]  ? kobject_put (lib/kobject.c:733)
[  112.916954][  T848]  kasan_report (mm/kasan/report.c:597)
[  112.916958][  T848]  ? kobject_put (lib/kobject.c:733)
[  112.916963][  T848]  kobject_put (lib/kobject.c:733)
[  112.916967][  T848]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  112.916973][  T848]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  112.916975][  T848]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  112.916981][  T848]  ? generic_xdp_install (net/core/dev.c:11630)
[  112.916985][  T848]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  112.916989][  T848]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  112.916995][  T848]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  112.917013][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.917021][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.917028][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.917032][  T848]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  112.917035][  T848]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  112.917039][  T848]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  112.917042][  T848]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  112.917046][  T848]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  112.917049][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.917056][  T848]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  112.917062][  T848]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  112.917065][  T848]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  112.917072][  T848]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  112.917074][  T848]  ? 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)
[  112.917078][  T848]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  112.917082][  T848]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  112.917086][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.917092][  T848]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  112.917096][  T848]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  112.917099][  T848]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  112.917107][  T848]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  112.917110][  T848]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  112.917117][  T848]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  112.917120][  T848]  ? __copy_msghdr (net/socket.c:2556)
[  112.917128][  T848]  ___sys_sendmsg (net/socket.c:2686)
[  112.917131][  T848]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  112.917134][  T848]  ? __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)
[  112.917140][  T848]  ? copy_msghdr_from_user (net/socket.c:2673)
[  112.917145][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.917149][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.917155][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.917159][  T848]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  112.917165][  T848]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  112.917171][  T848]  __sys_sendmsg (net/socket.c:2716)
[  112.917174][  T848]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  112.917178][  T848]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  112.917185][  T848]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  112.917189][  T848]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  112.917195][  T848]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  112.917200][  T848] RIP: 0033:0x7fe327ed01d7
[  112.917205][  T848] 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)
[  112.917208][  T848] RSP: 002b:00007ffeaaec1308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  112.917213][  T848] RAX: ffffffffffffffda RBX: 00007ffeaaec1a30 RCX: 00007fe327ed01d7
[  112.917215][  T848] RDX: 0000000000000000 RSI: 00007ffeaaec1370 RDI: 0000000000000005
[  112.917216][  T848] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  112.917218][  T848] R10: 00007fe327dccf60 R11: 0000000000000246 R12: 0000000000000002
[  112.917220][  T848] R13: 00000000690df59e R14: 0000000000499600 R15: 0000000000000000
| [  112.943558][  T848] refcount_t: underflow; use-after-free.
| [  112.943758][  T848] WARNING: CPU: 3 PID: 848 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  112.944070][  T848] Modules linked in: sch_tbf sch_prio bridge stp llc act_gact cls_flower sch_ingress 8021q vrf veth
| [  112.944789][  T848] Tainted: [B]=BAD_PAGE
[  112.944927][  T848] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  112.945140][  T848] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  112.945361][  T848] 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 c5 9b 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 c5 9b 	mov    $0xffffffff9bc58d60,%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
[  112.945985][  T848] RSP: 0018:ffffc90000f9f1f0 EFLAGS: 00010286
[  112.946196][  T848] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  112.946467][  T848] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  112.946726][  T848] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff38be134
[  112.947002][  T848] R10: 0000000000000003 R11: ffffc90000f9ed80 R12: 0000000000000001
[  112.947255][  T848] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  112.947518][  T848] FS:  00007fe327d02800(0000) GS:ffff888098972000(0000) knlGS:0000000000000000
[  112.947839][  T848] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  112.948047][  T848] CR2: 00005628074b3ba8 CR3: 000000000f012004 CR4: 0000000000772ef0
[  112.948297][  T848] PKRU: 55555554
[  112.948425][  T848] Call Trace:
[  112.948562][  T848]  <TASK>
[  112.948649][  T848]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  112.948844][  T848]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  112.949018][  T848]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  112.949189][  T848]  ? generic_xdp_install (net/core/dev.c:11630)
[  112.949352][  T848]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  112.949533][  T848]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  112.949711][  T848]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  112.949957][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.950127][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.950303][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.950469][  T848]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  112.950662][  T848]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  112.950849][  T848]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  112.951055][  T848]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  112.951223][  T848]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  112.951400][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.951591][  T848]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  112.951758][  T848]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  112.951942][  T848]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  112.952117][  T848]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  112.952280][  T848]  ? 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)
[  112.952467][  T848]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  112.952770][  T848]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  112.953060][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.953241][  T848]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  112.953412][  T848]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  112.953696][  T848]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  112.953885][  T848]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  112.954051][  T848]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  112.954218][  T848]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  112.954427][  T848]  ? __copy_msghdr (net/socket.c:2556)
[  112.954712][  T848]  ___sys_sendmsg (net/socket.c:2686)
[  112.955018][  T848]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  112.955186][  T848]  ? __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)
[  112.955396][  T848]  ? copy_msghdr_from_user (net/socket.c:2673)
[  112.955668][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.955847][  T848]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  112.956019][  T848]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  112.956186][  T848]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  112.956364][  T848]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  112.956633][  T848]  __sys_sendmsg (net/socket.c:2716)
[  112.956941][  T848]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  112.957149][  T848]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  112.957317][  T848]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  112.957481][  T848]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  112.957651][  T848]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  112.957899][  T848] RIP: 0033:0x7fe327ed01d7
[  112.958083][  T848] 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)
[  112.959025][  T848] RSP: 002b:00007ffeaaec1308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  112.959285][  T848] RAX: ffffffffffffffda RBX: 00007ffeaaec1a30 RCX: 00007fe327ed01d7
[  112.959540][  T848] RDX: 0000000000000000 RSI: 00007ffeaaec1370 RDI: 0000000000000005
[  112.959825][  T848] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  112.960072][  T848] R10: 00007fe327dccf60 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