======================================
| [  182.450480][ T1013] ==================================================================
| [  182.450924][ T1013] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  182.451319][ T1013] Read of size 1 at addr ffff88800e3216ac by task ip/1013
| [  182.451609][ T1013]
[  182.451747][ T1013] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  182.451750][ T1013] Call Trace:
[  182.451752][ T1013]  <TASK>
[  182.451755][ T1013]  dump_stack_lvl (lib/dump_stack.c:123)
[  182.451762][ T1013]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  182.451770][ T1013]  ? kobject_put (lib/kobject.c:733)
[  182.451776][ T1013]  print_report (mm/kasan/report.c:483)
[  182.451780][ T1013]  ? kobject_put (lib/kobject.c:733)
[  182.451784][ T1013]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  182.451789][ T1013]  ? kobject_put (lib/kobject.c:733)
[  182.451793][ T1013]  kasan_report (mm/kasan/report.c:597)
[  182.451798][ T1013]  ? kobject_put (lib/kobject.c:733)
[  182.451807][ T1013]  kobject_put (lib/kobject.c:733)
[  182.451812][ T1013]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  182.451818][ T1013]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  182.451822][ T1013]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  182.451827][ T1013]  ? generic_xdp_install (net/core/dev.c:11630)
[  182.451834][ T1013]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  182.451841][ T1013]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  182.451847][ T1013]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  182.451881][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.451890][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.451899][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.451904][ T1013]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  182.451908][ T1013]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  182.451914][ T1013]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  182.451919][ T1013]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  182.451925][ T1013]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  182.451928][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.451940][ T1013]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  182.451946][ T1013]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  182.451951][ T1013]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  182.451962][ T1013]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  182.451966][ T1013]  ? 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)
[  182.451972][ T1013]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  182.451978][ T1013]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  182.451984][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.451993][ T1013]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  182.451999][ T1013]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  182.452005][ T1013]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  182.452013][ T1013]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  182.452018][ T1013]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  182.452026][ T1013]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  182.452030][ T1013]  ? __copy_msghdr (net/socket.c:2556)
[  182.452042][ T1013]  ___sys_sendmsg (net/socket.c:2686)
[  182.452046][ T1013]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  182.452050][ T1013]  ? __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)
[  182.452064][ T1013]  ? copy_msghdr_from_user (net/socket.c:2673)
[  182.452071][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.452078][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.452087][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.452092][ T1013]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  182.452101][ T1013]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  182.452111][ T1013]  __sys_sendmsg (net/socket.c:2716)
[  182.452115][ T1013]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  182.452120][ T1013]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  182.452132][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  182.452138][ T1013]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  182.452145][ T1013]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  182.452150][ T1013] RIP: 0033:0x7fc781f941d7
[  182.452156][ T1013] 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)
[  182.452160][ T1013] RSP: 002b:00007ffd7e43baf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  182.452165][ T1013] RAX: ffffffffffffffda RBX: 00007ffd7e43c220 RCX: 00007fc781f941d7
[  182.452169][ T1013] RDX: 0000000000000000 RSI: 00007ffd7e43bb60 RDI: 0000000000000005
[  182.452171][ T1013] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  182.452174][ T1013] R10: 00007fc781e90f60 R11: 0000000000000246 R12: 0000000000000002
[  182.452176][ T1013] R13: 00000000690de9e7 R14: 0000000000499600 R15: 0000000000000000
| [  182.493567][ T1013] refcount_t: underflow; use-after-free.
| [  182.493838][ T1013] WARNING: CPU: 0 PID: 1013 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  182.494292][ T1013] Modules linked in: bridge stp llc 8021q vrf veth
| [  182.495288][ T1013] Tainted: [B]=BAD_PAGE
[  182.495472][ T1013] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  182.495934][ T1013] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  182.496261][ T1013] 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 a5 a0 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 a5 a0 	mov    $0xffffffffa0a58d60,%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
[  182.497473][ T1013] RSP: 0018:ffffc90001db71f0 EFLAGS: 00010286
[  182.498098][ T1013] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  182.498489][ T1013] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  182.498861][ T1013] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff427e134
[  182.499250][ T1013] R10: 0000000000000003 R11: ffffc90001db6d80 R12: 0000000000000001
[  182.499663][ T1013] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  182.500058][ T1013] FS:  00007fc781dc6800(0000) GS:ffff8880939f2000(0000) knlGS:0000000000000000
[  182.500524][ T1013] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  182.500860][ T1013] CR2: 00000000004e5be0 CR3: 000000000cc09005 CR4: 0000000000772ef0
[  182.501261][ T1013] PKRU: 55555554
[  182.501625][ T1013] Call Trace:
[  182.501821][ T1013]  <TASK>
[  182.501965][ T1013]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  182.502397][ T1013]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  182.502660][ T1013]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  182.502918][ T1013]  ? generic_xdp_install (net/core/dev.c:11630)
[  182.503187][ T1013]  ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387)
[  182.503450][ T1013]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  182.503874][ T1013]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  182.504260][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.504509][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.504934][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.505216][ T1013]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  182.505459][ T1013]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  182.505723][ T1013]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  182.506211][ T1013]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  182.506495][ T1013]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  182.506761][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.507030][ T1013]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  182.507314][ T1013]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  182.507563][ T1013]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  182.507836][ T1013]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  182.508082][ T1013]  ? 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)
[  182.508369][ T1013]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  182.508644][ T1013]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  182.508919][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.509231][ T1013]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  182.509655][ T1013]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  182.509906][ T1013]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  182.510165][ T1013]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  182.510416][ T1013]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  182.510819][ T1013]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  182.511135][ T1013]  ? __copy_msghdr (net/socket.c:2556)
[  182.511403][ T1013]  ___sys_sendmsg (net/socket.c:2686)
[  182.511644][ T1013]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  182.512047][ T1013]  ? __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)
[  182.512358][ T1013]  ? copy_msghdr_from_user (net/socket.c:2673)
[  182.512594][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.512845][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  182.513256][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  182.513511][ T1013]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  182.513786][ T1013]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  182.514047][ T1013]  __sys_sendmsg (net/socket.c:2716)
[  182.514303][ T1013]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  182.514611][ T1013]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  182.514870][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  182.515291][ T1013]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  182.515545][ T1013]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  182.515847][ T1013] RIP: 0033:0x7fc781f941d7
[  182.516121][ T1013] 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)
[  182.517195][ T1013] RSP: 002b:00007ffd7e43baf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  182.517731][ T1013] RAX: ffffffffffffffda RBX: 00007ffd7e43c220 RCX: 00007fc781f941d7
[  182.518167][ T1013] RDX: 0000000000000000 RSI: 00007ffd7e43bb60 RDI: 0000000000000005
[  182.518573][ T1013] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  182.519102][ T1013] R10: 00007fc781e90f60 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