======================================
| [   26.812575][  T650] ==================================================================
| [   26.812873][  T650] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   26.813131][  T650] Read of size 1 at addr ffff8880051596c4 by task ip/650
| [   26.813335][  T650]
[   26.813436][  T650] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.813439][  T650] Call Trace:
[   26.813441][  T650]  <TASK>
[   26.813443][  T650]  dump_stack_lvl (lib/dump_stack.c:123)
[   26.813448][  T650]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   26.813455][  T650]  ? kobject_put (lib/kobject.c:733)
[   26.813458][  T650]  print_report (mm/kasan/report.c:483)
[   26.813462][  T650]  ? kobject_put (lib/kobject.c:733)
[   26.813465][  T650]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   26.813468][  T650]  ? kobject_put (lib/kobject.c:733)
[   26.813471][  T650]  kasan_report (mm/kasan/report.c:597)
[   26.813475][  T650]  ? kobject_put (lib/kobject.c:733)
[   26.813480][  T650]  kobject_put (lib/kobject.c:733)
[   26.813484][  T650]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   26.813490][  T650]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   26.813493][  T650]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   26.813497][  T650]  ? generic_xdp_install (net/core/dev.c:11630)
[   26.813502][  T650]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   26.813506][  T650]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   26.813511][  T650]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   26.813531][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.813538][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.813543][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.813547][  T650]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   26.813550][  T650]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   26.813554][  T650]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   26.813557][  T650]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   26.813561][  T650]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   26.813565][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.813571][  T650]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   26.813575][  T650]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   26.813579][  T650]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   26.813586][  T650]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   26.813588][  T650]  ? 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)
[   26.813592][  T650]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   26.813595][  T650]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   26.813599][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.813603][  T650]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   26.813607][  T650]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   26.813611][  T650]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   26.813616][  T650]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   26.813619][  T650]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   26.813622][  T650]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   26.813625][  T650]  ? __copy_msghdr (net/socket.c:2556)
[   26.813632][  T650]  ___sys_sendmsg (net/socket.c:2686)
[   26.813635][  T650]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   26.813639][  T650]  ? __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)
[   26.813642][  T650]  ? copy_msghdr_from_user (net/socket.c:2673)
[   26.813647][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.813651][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.813656][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.813660][  T650]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   26.813665][  T650]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   26.813670][  T650]  __sys_sendmsg (net/socket.c:2716)
[   26.813673][  T650]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   26.813675][  T650]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   26.813682][  T650]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   26.813687][  T650]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   26.813692][  T650]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   26.813696][  T650] RIP: 0033:0x7fc1d25a21d7
[   26.813701][  T650] 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)
[   26.813703][  T650] RSP: 002b:00007fffb6850338 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   26.813707][  T650] RAX: ffffffffffffffda RBX: 00007fffb6850a60 RCX: 00007fc1d25a21d7
[   26.813709][  T650] RDX: 0000000000000000 RSI: 00007fffb68503a0 RDI: 0000000000000005
[   26.813711][  T650] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   26.813713][  T650] R10: 00007fc1d249ef60 R11: 0000000000000246 R12: 0000000000000002
[   26.813715][  T650] R13: 00000000690e05e3 R14: 0000000000499600 R15: 0000000000000000
| [   26.840246][  T650] refcount_t: underflow; use-after-free.
| [   26.840461][  T650] WARNING: CPU: 3 PID: 650 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   26.840748][  T650] Modules linked in:
| [   26.841200][  T650] Tainted: [B]=BAD_PAGE
[   26.841326][  T650] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.841550][  T650] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   26.841860][  T650] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba e5 84 e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
All code
========
   0:	cc                   	int3
   1:	38 03                	cmp    %al,(%rbx)
   3:	80 fb 01             	cmp    $0x1,%bl
   6:	0f 87 29 33 d7 fe    	ja     0xfffffffffed73335
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 17 cc 38 03 01 	movb   $0x1,0x338cc17(%rip)        # 0x338cc33
  1c:	90                   	nop
  1d:	48 c7 c7 40 ba e5 84 	mov    $0xffffffff84e5ba40,%rdi
  24:	e8 62 d6 16 ff       	call   0xffffffffff16d68b
  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 c0 9d a0 ff       	call   0xffffffffffa09dfb
  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 c0 9d a0 ff       	call   0xffffffffffa09dd1
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[   26.842572][  T650] RSP: 0018:ffffc900015371f0 EFLAGS: 00010286
[   26.842887][  T650] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   26.843154][  T650] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   26.843537][  T650] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0bc0934
[   26.843802][  T650] R10: 0000000000000003 R11: ffffc90001536d80 R12: 0000000000000001
[   26.844163][  T650] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   26.844449][  T650] FS:  00007fc1d23d4800(0000) GS:ffff8880df888000(0000) knlGS:0000000000000000
[   26.844762][  T650] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.845083][  T650] CR2: 0000559ba6ed2dec CR3: 0000000008bfd005 CR4: 0000000000772ef0
[   26.845350][  T650] PKRU: 55555554
[   26.845502][  T650] Call Trace:
[   26.845638][  T650]  <TASK>
[   26.845826][  T650]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   26.846008][  T650]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   26.846186][  T650]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   26.846363][  T650]  ? generic_xdp_install (net/core/dev.c:11630)
[   26.846651][  T650]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[   26.846832][  T650]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   26.847011][  T650]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   26.847244][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.847536][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.847717][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.847892][  T650]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   26.848071][  T650]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   26.848340][  T650]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   26.848577][  T650]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   26.848757][  T650]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   26.848935][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.849115][  T650]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   26.849294][  T650]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   26.849482][  T650]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   26.849672][  T650]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   26.849941][  T650]  ? 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)
[   26.850121][  T650]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   26.850301][  T650]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   26.850605][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.850787][  T650]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   26.850963][  T650]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   26.851135][  T650]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   26.851315][  T650]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   26.851606][  T650]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   26.851783][  T650]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   26.852005][  T650]  ? __copy_msghdr (net/socket.c:2556)
[   26.852274][  T650]  ___sys_sendmsg (net/socket.c:2686)
[   26.852470][  T650]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   26.852664][  T650]  ? __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)
[   26.852885][  T650]  ? copy_msghdr_from_user (net/socket.c:2673)
[   26.853157][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.853334][  T650]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   26.853519][  T650]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.853710][  T650]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   26.853981][  T650]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   26.854161][  T650]  __sys_sendmsg (net/socket.c:2716)
[   26.854337][  T650]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   26.854562][  T650]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   26.854937][  T650]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   26.855118][  T650]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   26.855299][  T650]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   26.855631][  T650] RIP: 0033:0x7fc1d25a21d7
[   26.855821][  T650] 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)
[   26.856551][  T650] RSP: 002b:00007fffb6850338 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   26.856837][  T650] RAX: ffffffffffffffda RBX: 00007fffb6850a60 RCX: 00007fc1d25a21d7
[   26.857103][  T650] RDX: 0000000000000000 RSI: 00007fffb68503a0 RDI: 0000000000000005
[   26.857375][  T650] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   26.857658][  T650] R10: 00007fc1d249ef60 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