======================================
| [   75.130864][  T589] ==================================================================
| [   75.131191][  T589] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   75.131509][  T589] Read of size 1 at addr ffff8880056516ac by task ip/589
| [   75.131730][  T589]
[   75.131840][  T589] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   75.131843][  T589] Call Trace:
[   75.131845][  T589]  <TASK>
[   75.131847][  T589]  dump_stack_lvl (lib/dump_stack.c:123)
[   75.131856][  T589]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   75.131870][  T589]  ? kobject_put (lib/kobject.c:733)
[   75.131874][  T589]  print_report (mm/kasan/report.c:483)
[   75.131877][  T589]  ? kobject_put (lib/kobject.c:733)
[   75.131880][  T589]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   75.131884][  T589]  ? kobject_put (lib/kobject.c:733)
[   75.131887][  T589]  kasan_report (mm/kasan/report.c:597)
[   75.131891][  T589]  ? kobject_put (lib/kobject.c:733)
[   75.131896][  T589]  kobject_put (lib/kobject.c:733)
[   75.131900][  T589]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   75.131905][  T589]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   75.131909][  T589]  ? generic_xdp_install (net/core/dev.c:11630)
[   75.131913][  T589]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   75.131920][  T589]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   75.131926][  T589]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   75.131945][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.131952][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.131959][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.131963][  T589]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   75.131965][  T589]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   75.131970][  T589]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   75.131973][  T589]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   75.131977][  T589]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   75.131980][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.131987][  T589]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   75.131994][  T589]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   75.131997][  T589]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   75.132004][  T589]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   75.132007][  T589]  ? 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)
[   75.132011][  T589]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   75.132015][  T589]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   75.132018][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.132024][  T589]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   75.132028][  T589]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   75.132034][  T589]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   75.132045][  T589]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   75.132049][  T589]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   75.132059][  T589]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   75.132062][  T589]  ? __copy_msghdr (net/socket.c:2556)
[   75.132070][  T589]  ___sys_sendmsg (net/socket.c:2686)
[   75.132074][  T589]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   75.132077][  T589]  ? __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)
[   75.132085][  T589]  ? copy_msghdr_from_user (net/socket.c:2673)
[   75.132090][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.132095][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.132100][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.132104][  T589]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   75.132117][  T589]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   75.132123][  T589]  __sys_sendmsg (net/socket.c:2716)
[   75.132127][  T589]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   75.132131][  T589]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   75.132138][  T589]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   75.132142][  T589]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   75.132149][  T589]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   75.132153][  T589] RIP: 0033:0x7f48d03c41d7
[   75.132162][  T589] 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)
[   75.132165][  T589] RSP: 002b:00007ffe71171438 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   75.132169][  T589] RAX: ffffffffffffffda RBX: 00007ffe71171b60 RCX: 00007f48d03c41d7
[   75.132171][  T589] RDX: 0000000000000000 RSI: 00007ffe711714a0 RDI: 0000000000000005
[   75.132173][  T589] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   75.132175][  T589] R10: 00007f48d02c0f60 R11: 0000000000000246 R12: 0000000000000002
[   75.132177][  T589] R13: 00000000690df74e R14: 0000000000499600 R15: 0000000000000000
| [   75.160352][  T589] refcount_t: underflow; use-after-free.
| [   75.160582][  T589] WARNING: CPU: 1 PID: 589 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   75.160921][  T589] Modules linked in: cls_flower act_mirred 8021q bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [   75.161825][  T589] Tainted: [B]=BAD_PAGE
[   75.161958][  T589] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   75.162189][  T589] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   75.162440][  T589] 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 85 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 85 95 	mov    $0xffffffff95858d60,%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
[   75.163068][  T589] RSP: 0018:ffffc90000dd71f0 EFLAGS: 00010286
[   75.163303][  T589] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   75.163582][  T589] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   75.163867][  T589] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2c3e134
[   75.164128][  T589] R10: 0000000000000003 R11: ffffc90000dd6d80 R12: 0000000000000001
[   75.164415][  T589] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   75.164683][  T589] FS:  00007f48d01f6800(0000) GS:ffff88809ec72000(0000) knlGS:0000000000000000
[   75.165001][  T589] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.165220][  T589] CR2: 000055dcef478bb8 CR3: 000000000d138006 CR4: 0000000000772ef0
[   75.165602][  T589] PKRU: 55555554
[   75.165745][  T589] Call Trace:
[   75.165883][  T589]  <TASK>
[   75.165980][  T589]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   75.166259][  T589]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   75.166441][  T589]  ? generic_xdp_install (net/core/dev.c:11630)
[   75.166624][  T589]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   75.166804][  T589]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   75.167078][  T589]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   75.167328][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.167518][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.167699][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.167976][  T589]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   75.168149][  T589]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   75.168338][  T589]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   75.168563][  T589]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   75.168842][  T589]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   75.169018][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.169192][  T589]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   75.169386][  T589]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   75.169663][  T589]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   75.169852][  T589]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   75.170024][  T589]  ? 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)
[   75.170197][  T589]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   75.170496][  T589]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   75.170670][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.170852][  T589]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   75.171025][  T589]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   75.171305][  T589]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   75.171486][  T589]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   75.171658][  T589]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   75.171949][  T589]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   75.172169][  T589]  ? __copy_msghdr (net/socket.c:2556)
[   75.172359][  T589]  ___sys_sendmsg (net/socket.c:2686)
[   75.172543][  T589]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   75.172821][  T589]  ? __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)
[   75.173043][  T589]  ? copy_msghdr_from_user (net/socket.c:2673)
[   75.173215][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.173399][  T589]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   75.173699][  T589]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   75.173879][  T589]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   75.174056][  T589]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   75.174232][  T589]  __sys_sendmsg (net/socket.c:2716)
[   75.174525][  T589]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   75.174741][  T589]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   75.174924][  T589]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   75.175104][  T589]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   75.175387][  T589]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   75.175612][  T589] RIP: 0033:0x7f48d03c41d7
[   75.175793][  T589] 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)
[   75.176533][  T589] RSP: 002b:00007ffe71171438 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   75.176802][  T589] RAX: ffffffffffffffda RBX: 00007ffe71171b60 RCX: 00007f48d03c41d7
[   75.177184][  T589] RDX: 0000000000000000 RSI: 00007ffe711714a0 RDI: 0000000000000005
[   75.177471][  T589] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   75.177842][  T589] R10: 00007f48d02c0f60 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