======================================
| [  168.279990][ T1012] ==================================================================
| [  168.280295][ T1012] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  168.280612][ T1012] Read of size 1 at addr ffff88800bbe16ac by task ip/1012
| [  168.280817][ T1012]
[  168.280944][ T1012] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  168.280949][ T1012] Call Trace:
[  168.280951][ T1012]  <TASK>
[  168.280953][ T1012]  dump_stack_lvl (lib/dump_stack.c:123)
[  168.280960][ T1012]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  168.280967][ T1012]  ? kobject_put (lib/kobject.c:733)
[  168.280971][ T1012]  print_report (mm/kasan/report.c:483)
[  168.280974][ T1012]  ? kobject_put (lib/kobject.c:733)
[  168.280978][ T1012]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  168.280981][ T1012]  ? kobject_put (lib/kobject.c:733)
[  168.280984][ T1012]  kasan_report (mm/kasan/report.c:597)
[  168.280987][ T1012]  ? kobject_put (lib/kobject.c:733)
[  168.280993][ T1012]  kobject_put (lib/kobject.c:733)
[  168.280997][ T1012]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  168.281005][ T1012]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  168.281007][ T1012]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  168.281012][ T1012]  ? generic_xdp_install (net/core/dev.c:11630)
[  168.281017][ T1012]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  168.281021][ T1012]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  168.281027][ T1012]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  168.281046][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.281054][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.281061][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.281065][ T1012]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  168.281067][ T1012]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  168.281072][ T1012]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  168.281075][ T1012]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  168.281079][ T1012]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  168.281081][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.281089][ T1012]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  168.281098][ T1012]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  168.281101][ T1012]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  168.281108][ T1012]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  168.281110][ T1012]  ? 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)
[  168.281114][ T1012]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  168.281118][ T1012]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  168.281122][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.281128][ T1012]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  168.281132][ T1012]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  168.281135][ T1012]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  168.281143][ T1012]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  168.281146][ T1012]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  168.281157][ T1012]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  168.281160][ T1012]  ? __copy_msghdr (net/socket.c:2556)
[  168.281170][ T1012]  ___sys_sendmsg (net/socket.c:2686)
[  168.281173][ T1012]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  168.281176][ T1012]  ? __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)
[  168.281186][ T1012]  ? copy_msghdr_from_user (net/socket.c:2673)
[  168.281191][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.281195][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.281201][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.281204][ T1012]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  168.281213][ T1012]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  168.281219][ T1012]  __sys_sendmsg (net/socket.c:2716)
[  168.281222][ T1012]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  168.281226][ T1012]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  168.281234][ T1012]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  168.281238][ T1012]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  168.281246][ T1012]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  168.281250][ T1012] RIP: 0033:0x7f3bd146f1d7
[  168.281255][ T1012] 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)
[  168.281259][ T1012] RSP: 002b:00007fff6c6f9848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  168.281263][ T1012] RAX: ffffffffffffffda RBX: 00007fff6c6f9f70 RCX: 00007f3bd146f1d7
[  168.281265][ T1012] RDX: 0000000000000000 RSI: 00007fff6c6f98b0 RDI: 0000000000000005
[  168.281267][ T1012] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  168.281269][ T1012] R10: 00007f3bd136bf60 R11: 0000000000000246 R12: 0000000000000002
[  168.281271][ T1012] R13: 00000000690df476 R14: 0000000000499600 R15: 0000000000000000
| [  168.308609][ T1012] refcount_t: underflow; use-after-free.
| [  168.308853][ T1012] WARNING: CPU: 2 PID: 1012 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  168.309237][ T1012] Modules linked in: bridge stp llc 8021q vrf veth
| [  168.309900][ T1012] Tainted: [B]=BAD_PAGE
[  168.310072][ T1012] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  168.310339][ T1012] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  168.310611][ T1012] 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 25 8e 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 25 8e 	mov    $0xffffffff8e258d60,%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
[  168.311297][ T1012] RSP: 0018:ffffc90001d971f0 EFLAGS: 00010286
[  168.311547][ T1012] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  168.311860][ T1012] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  168.312178][ T1012] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1d7e134
[  168.312489][ T1012] R10: 0000000000000003 R11: ffffc90001d96d80 R12: 0000000000000001
[  168.312797][ T1012] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  168.313101][ T1012] FS:  00007f3bd12a1800(0000) GS:ffff8880a62f2000(0000) knlGS:0000000000000000
[  168.313451][ T1012] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  168.313713][ T1012] CR2: 00007f93ac964aa0 CR3: 000000000e1f4006 CR4: 0000000000772ef0
[  168.314005][ T1012] PKRU: 55555554
[  168.314166][ T1012] Call Trace:
[  168.314325][ T1012]  <TASK>
[  168.314439][ T1012]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  168.314642][ T1012]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  168.314838][ T1012]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  168.315043][ T1012]  ? generic_xdp_install (net/core/dev.c:11630)
[  168.315237][ T1012]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  168.315434][ T1012]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  168.315732][ T1012]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  168.315981][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.316184][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.316480][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.316681][ T1012]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  168.316871][ T1012]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  168.317074][ T1012]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  168.317438][ T1012]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  168.317643][ T1012]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  168.317844][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.318051][ T1012]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  168.318357][ T1012]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  168.318549][ T1012]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  168.318751][ T1012]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  168.318938][ T1012]  ? 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)
[  168.319251][ T1012]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  168.319450][ T1012]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  168.319647][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.319847][ T1012]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  168.320054][ T1012]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  168.320252][ T1012]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  168.320449][ T1012]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  168.320643][ T1012]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  168.320934][ T1012]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  168.321192][ T1012]  ? __copy_msghdr (net/socket.c:2556)
[  168.321389][ T1012]  ___sys_sendmsg (net/socket.c:2686)
[  168.321580][ T1012]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  168.321868][ T1012]  ? __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)
[  168.322107][ T1012]  ? copy_msghdr_from_user (net/socket.c:2673)
[  168.322310][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.322503][ T1012]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  168.322807][ T1012]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  168.323014][ T1012]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  168.323217][ T1012]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  168.323422][ T1012]  __sys_sendmsg (net/socket.c:2716)
[  168.323723][ T1012]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  168.323964][ T1012]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  168.324159][ T1012]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  168.324356][ T1012]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  168.324559][ T1012]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  168.324793][ T1012] RIP: 0033:0x7f3bd146f1d7
[  168.325004][ T1012] 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)
[  168.325657][ T1012] RSP: 002b:00007fff6c6f9848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  168.325943][ T1012] RAX: ffffffffffffffda RBX: 00007fff6c6f9f70 RCX: 00007f3bd146f1d7
[  168.326268][ T1012] RDX: 0000000000000000 RSI: 00007fff6c6f98b0 RDI: 0000000000000005
[  168.326550][ T1012] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  168.326825][ T1012] R10: 00007f3bd136bf60 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