======================================
| [   42.333164][  T319] ==================================================================
| [   42.333561][  T319] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   42.333827][  T319] Read of size 1 at addr ffff888008fe46ac by task teamd/319
| [   42.334066][  T319]
[   42.334162][  T319] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.334164][  T319] Call Trace:
[   42.334166][  T319]  <TASK>
[   42.334167][  T319]  dump_stack_lvl (lib/dump_stack.c:123)
[   42.334173][  T319]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   42.334180][  T319]  ? kobject_put (lib/kobject.c:733)
[   42.334184][  T319]  print_report (mm/kasan/report.c:483)
[   42.334187][  T319]  ? kobject_put (lib/kobject.c:733)
[   42.334190][  T319]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   42.334193][  T319]  ? kobject_put (lib/kobject.c:733)
[   42.334196][  T319]  kasan_report (mm/kasan/report.c:597)
[   42.334200][  T319]  ? kobject_put (lib/kobject.c:733)
[   42.334205][  T319]  kobject_put (lib/kobject.c:733)
[   42.334209][  T319]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   42.334214][  T319]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   42.334217][  T319]  ? generic_xdp_install (net/core/dev.c:11630)
[   42.334220][  T319]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   42.334223][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.334230][  T319]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   42.334235][  T319]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   42.334254][  T319]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.334261][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.334271][  T319]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.334278][  T319]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   42.334282][  T319]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.334290][  T319]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   42.334296][  T319]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   42.334302][  T319]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.334307][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.334319][  T319]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   42.334326][  T319]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.334332][  T319]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   42.334344][  T319]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   42.334349][  T319]  ? 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)
[   42.334356][  T319]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   42.334364][  T319]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   42.334370][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.334379][  T319]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   42.334387][  T319]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.334392][  T319]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   42.334402][  T319]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.334407][  T319]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   42.334414][  T319]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   42.334418][  T319]  ? __copy_msghdr (net/socket.c:2556)
[   42.334425][  T319]  ___sys_sendmsg (net/socket.c:2686)
[   42.334430][  T319]  ? copy_msghdr_from_user (net/socket.c:2673)
[   42.334434][  T319]  ? do_pte_missing (mm/memory.c:6134)
[   42.334438][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.334444][  T319]  ? __handle_mm_fault (mm/memory.c:6318)
[   42.334448][  T319]  ? __pmd_alloc (mm/memory.c:6229)
[   42.334454][  T319]  ? lock_vma_under_rcu (mm/mmap_lock.c:226)
[   42.334456][  T319]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   42.334460][  T319]  __sys_sendmsg (net/socket.c:2716)
[   42.334464][  T319]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   42.334467][  T319]  ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532)
[   42.334474][  T319]  ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:143 ./include/linux/mmap_lock.h:182 arch/x86/mm/fault.c:1338)
[   42.334480][  T319]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.334485][  T319]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   42.334490][  T319]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   42.334494][  T319] RIP: 0033:0x7f226d08f1d7
[   42.334499][  T319] 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)
[   42.334502][  T319] RSP: 002b:00007ffc61ee6de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   42.334506][  T319] RAX: ffffffffffffffda RBX: 0000000034256320 RCX: 00007f226d08f1d7
[   42.334508][  T319] RDX: 0000000000000000 RSI: 00007ffc61ee6e20 RDI: 0000000000000005
[   42.334510][  T319] RBP: 0000000034256230 R08: 0000000000000003 R09: 0000000000000000
[   42.334511][  T319] R10: 0000000000000200 R11: 0000000000000246 R12: 0000000034256690
[   42.334513][  T319] R13: 00007ffc61ee6e20 R14: 0000000000000000 R15: 00007ffc61ee6f80
| [   42.365449][  T319] refcount_t: underflow; use-after-free.
| [   42.365671][  T319] WARNING: CPU: 3 PID: 319 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   42.366017][  T319] Modules linked in: act_gact act_mirred cls_flower sch_ingress ip_gre gre 8021q vrf veth
| [   42.367722][  T319] Tainted: [B]=BAD_PAGE
[   42.367879][  T319] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.368159][  T319] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   42.368375][  T319] 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 9c 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 9c 	mov    $0xffffffff9c458d60,%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
[   42.369235][  T319] RSP: 0018:ffffc900006c71f0 EFLAGS: 00010286
[   42.369531][  T319] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   42.369777][  T319] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   42.370015][  T319] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff39be134
[   42.370258][  T319] R10: 0000000000000003 R11: ffffc900006c6d80 R12: 0000000000000001
[   42.370675][  T319] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   42.370991][  T319] FS:  00007f226cf4eb80(0000) GS:ffff888098172000(0000) knlGS:0000000000000000
[   42.371273][  T319] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.371704][  T319] CR2: 00007fcf15b9f000 CR3: 00000000142da002 CR4: 0000000000772ef0
[   42.371990][  T319] PKRU: 55555554
[   42.372114][  T319] Call Trace:
[   42.372234][  T319]  <TASK>
[   42.372326][  T319]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   42.372576][  T319]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   42.372738][  T319]  ? generic_xdp_install (net/core/dev.c:11630)
[   42.372898][  T319]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   42.373069][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.373235][  T319]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   42.373406][  T319]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   42.373691][  T319]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.373854][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.374019][  T319]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.374176][  T319]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   42.374334][  T319]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.374591][  T319]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   42.374792][  T319]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   42.374953][  T319]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.375148][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.375419][  T319]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   42.375829][  T319]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.376098][  T319]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   42.376374][  T319]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   42.376672][  T319]  ? 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)
[   42.376850][  T319]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   42.377028][  T319]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   42.377249][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.377548][  T319]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   42.377746][  T319]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.377954][  T319]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   42.378165][  T319]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.378356][  T319]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   42.378656][  T319]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   42.378921][  T319]  ? __copy_msghdr (net/socket.c:2556)
[   42.379103][  T319]  ___sys_sendmsg (net/socket.c:2686)
[   42.379281][  T319]  ? copy_msghdr_from_user (net/socket.c:2673)
[   42.379565][  T319]  ? do_pte_missing (mm/memory.c:6134)
[   42.379747][  T319]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.379936][  T319]  ? __handle_mm_fault (mm/memory.c:6318)
[   42.380111][  T319]  ? __pmd_alloc (mm/memory.c:6229)
[   42.380290][  T319]  ? lock_vma_under_rcu (mm/mmap_lock.c:226)
[   42.380547][  T319]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   42.380724][  T319]  __sys_sendmsg (net/socket.c:2716)
[   42.380903][  T319]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   42.381080][  T319]  ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532)
[   42.381264][  T319]  ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:143 ./include/linux/mmap_lock.h:182 arch/x86/mm/fault.c:1338)
[   42.381522][  T319]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.381704][  T319]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   42.381896][  T319]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   42.382116][  T319] RIP: 0033:0x7f226d08f1d7
[   42.382300][  T319] 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)
[   42.383038][  T319] RSP: 002b:00007ffc61ee6de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   42.383309][  T319] RAX: ffffffffffffffda RBX: 0000000034256320 RCX: 00007f226d08f1d7
[   42.383817][  T319] RDX: 0000000000000000 RSI: 00007ffc61ee6e20 RDI: 0000000000000005
[   42.384088][  T319] RBP: 0000000034256230 R08: 0000000000000003 R09: 0000000000000000
[   42.384374][  T319] R10: 0000000000000200 R11: 0000000000000246 R12: 0000000034256690


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