======================================
| [   57.462347][  T630] ==================================================================
| [   57.462857][  T630] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   57.463347][  T630] Read of size 1 at addr ffff888004dbc6ac by task ip/630
| [   57.463727][  T630]
[   57.463895][  T630] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   57.463900][  T630] Call Trace:
[   57.463908][  T630]  <TASK>
[   57.463911][  T630]  dump_stack_lvl (lib/dump_stack.c:123)
[   57.463923][  T630]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   57.463943][  T630]  ? kobject_put (lib/kobject.c:733)
[   57.463950][  T630]  print_report (mm/kasan/report.c:483)
[   57.463955][  T630]  ? kobject_put (lib/kobject.c:733)
[   57.463960][  T630]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   57.463966][  T630]  ? kobject_put (lib/kobject.c:733)
[   57.463971][  T630]  kasan_report (mm/kasan/report.c:597)
[   57.463978][  T630]  ? kobject_put (lib/kobject.c:733)
[   57.463988][  T630]  kobject_put (lib/kobject.c:733)
[   57.463995][  T630]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   57.464008][  T630]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   57.464011][  T630]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   57.464022][  T630]  ? generic_xdp_install (net/core/dev.c:11630)
[   57.464029][  T630]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   57.464036][  T630]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   57.464046][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   57.464085][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.464101][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.464113][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.464118][  T630]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   57.464123][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   57.464131][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   57.464137][  T630]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   57.464144][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   57.464149][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.464161][  T630]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   57.464171][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   57.464177][  T630]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   57.464189][  T630]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   57.464193][  T630]  ? 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)
[   57.464200][  T630]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   57.464208][  T630]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   57.464215][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.464225][  T630]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   57.464233][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   57.464239][  T630]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   57.464256][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   57.464262][  T630]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   57.464278][  T630]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   57.464283][  T630]  ? __copy_msghdr (net/socket.c:2556)
[   57.464297][  T630]  ___sys_sendmsg (net/socket.c:2686)
[   57.464302][  T630]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   57.464308][  T630]  ? __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)
[   57.464324][  T630]  ? copy_msghdr_from_user (net/socket.c:2673)
[   57.464333][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.464341][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.464351][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.464357][  T630]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   57.464374][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   57.464385][  T630]  __sys_sendmsg (net/socket.c:2716)
[   57.464390][  T630]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   57.464397][  T630]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   57.464411][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   57.464418][  T630]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   57.464428][  T630]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   57.464442][  T630] RIP: 0033:0x7fc8a7bc01d7
[   57.464450][  T630] 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)
[   57.464455][  T630] RSP: 002b:00007ffecadf6278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   57.464467][  T630] RAX: ffffffffffffffda RBX: 00007ffecadf69a0 RCX: 00007fc8a7bc01d7
[   57.464473][  T630] RDX: 0000000000000000 RSI: 00007ffecadf62e0 RDI: 0000000000000005
[   57.464477][  T630] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   57.464480][  T630] R10: 00007fc8a7abcf60 R11: 0000000000000246 R12: 0000000000000002
[   57.464482][  T630] R13: 00000000690df8e7 R14: 0000000000499600 R15: 0000000000000000
| [   57.494513][  T630] refcount_t: underflow; use-after-free.
| [   57.494750][  T630] WARNING: CPU: 0 PID: 630 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   57.495174][  T630] Modules linked in: sch_tbf bridge stp llc act_gact cls_flower sch_ingress 8021q vrf veth
| [   57.495868][  T630] Tainted: [B]=BAD_PAGE
[   57.496008][  T630] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   57.496236][  T630] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   57.496452][  T630] 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 b3 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 b3 	mov    $0xffffffffb3458d60,%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
[   57.497071][  T630] RSP: 0018:ffffc900009e71f0 EFLAGS: 00010286
[   57.497284][  T630] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   57.497556][  T630] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   57.497817][  T630] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff67be134
[   57.498088][  T630] R10: 0000000000000003 R11: ffffc900009e6d80 R12: 0000000000000001
[   57.498341][  T630] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   57.498637][  T630] FS:  00007fc8a79f2800(0000) GS:ffff888080ff2000(0000) knlGS:0000000000000000
[   57.498935][  T630] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   57.499194][  T630] CR2: 0000557dc8025dec CR3: 000000000aa95006 CR4: 0000000000772ef0
[   57.499448][  T630] PKRU: 55555554
[   57.499578][  T630] Call Trace:
[   57.499716][  T630]  <TASK>
[   57.499818][  T630]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   57.499996][  T630]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   57.500179][  T630]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   57.500343][  T630]  ? generic_xdp_install (net/core/dev.c:11630)
[   57.500513][  T630]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   57.500679][  T630]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   57.500852][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   57.501091][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.501264][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.501525][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.501688][  T630]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   57.501858][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   57.502037][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   57.502250][  T630]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   57.502416][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   57.502591][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.502763][  T630]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   57.503040][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   57.503302][  T630]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   57.503472][  T630]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   57.503637][  T630]  ? 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)
[   57.503807][  T630]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   57.504091][  T630]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   57.504264][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.504432][  T630]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   57.504692][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   57.504859][  T630]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   57.505037][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   57.505200][  T630]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   57.505453][  T630]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   57.505662][  T630]  ? __copy_msghdr (net/socket.c:2556)
[   57.505833][  T630]  ___sys_sendmsg (net/socket.c:2686)
[   57.506003][  T630]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   57.506268][  T630]  ? __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)
[   57.506473][  T630]  ? copy_msghdr_from_user (net/socket.c:2673)
[   57.506638][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.506808][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   57.507079][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   57.507251][  T630]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   57.507430][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   57.507598][  T630]  __sys_sendmsg (net/socket.c:2716)
[   57.507859][  T630]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   57.508070][  T630]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   57.508235][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   57.508396][  T630]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   57.508650][  T630]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   57.508858][  T630] RIP: 0033:0x7fc8a7bc01d7
[   57.509041][  T630] 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)
[   57.509741][  T630] RSP: 002b:00007ffecadf6278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   57.510103][  T630] RAX: ffffffffffffffda RBX: 00007ffecadf69a0 RCX: 00007fc8a7bc01d7
[   57.510369][  T630] RDX: 0000000000000000 RSI: 00007ffecadf62e0 RDI: 0000000000000005
[   57.510622][  T630] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   57.510968][  T630] R10: 00007fc8a7abcf60 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