======================================
| [  133.080468][  T630] ==================================================================
| [  133.080794][  T630] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  133.081124][  T630] Read of size 1 at addr ffff88800587a6ac by task ip/630
| [  133.081349][  T630]
[  133.081452][  T630] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  133.081454][  T630] Call Trace:
[  133.081457][  T630]  <TASK>
[  133.081459][  T630]  dump_stack_lvl (lib/dump_stack.c:123)
[  133.081465][  T630]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  133.081480][  T630]  ? kobject_put (lib/kobject.c:733)
[  133.081484][  T630]  print_report (mm/kasan/report.c:483)
[  133.081487][  T630]  ? kobject_put (lib/kobject.c:733)
[  133.081490][  T630]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  133.081493][  T630]  ? kobject_put (lib/kobject.c:733)
[  133.081496][  T630]  kasan_report (mm/kasan/report.c:597)
[  133.081500][  T630]  ? kobject_put (lib/kobject.c:733)
[  133.081505][  T630]  kobject_put (lib/kobject.c:733)
[  133.081509][  T630]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  133.081515][  T630]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  133.081518][  T630]  ? generic_xdp_install (net/core/dev.c:11630)
[  133.081520][  T630]  ? kernfs_put.part.0 (./arch/x86/include/asm/atomic.h:67 ./include/linux/atomic/atomic-arch-fallback.h:2278 ./include/linux/atomic/atomic-instrumented.h:1384 fs/kernfs/dir.c:595)
[  133.081531][  T630]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  133.081537][  T630]  ? br_dev_delete (net/bridge/br_if.c:397) bridge
[  133.081594][  T630]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  133.081599][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  133.081617][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.081626][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.081632][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.081635][  T630]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  133.081638][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  133.081642][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  133.081646][  T630]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  133.081649][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  133.081652][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.081659][  T630]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  133.081663][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  133.081667][  T630]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  133.081673][  T630]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  133.081676][  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)
[  133.081680][  T630]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  133.081684][  T630]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  133.081687][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.081693][  T630]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  133.081697][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  133.081701][  T630]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  133.081708][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  133.081711][  T630]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  133.081718][  T630]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  133.081721][  T630]  ? __copy_msghdr (net/socket.c:2556)
[  133.081728][  T630]  ___sys_sendmsg (net/socket.c:2686)
[  133.081731][  T630]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  133.081734][  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)
[  133.081742][  T630]  ? copy_msghdr_from_user (net/socket.c:2673)
[  133.081747][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.081751][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.081757][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.081760][  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)
[  133.081770][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  133.081777][  T630]  __sys_sendmsg (net/socket.c:2716)
[  133.081780][  T630]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  133.081783][  T630]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  133.081791][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  133.081795][  T630]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  133.081801][  T630]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  133.081809][  T630] RIP: 0033:0x7fcd717f21d7
[  133.081814][  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)
[  133.081817][  T630] RSP: 002b:00007ffef87563f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  133.081823][  T630] RAX: ffffffffffffffda RBX: 00007ffef8756b20 RCX: 00007fcd717f21d7
[  133.081825][  T630] RDX: 0000000000000000 RSI: 00007ffef8756460 RDI: 0000000000000005
[  133.081827][  T630] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  133.081828][  T630] R10: 00007fcd716eef60 R11: 0000000000000246 R12: 0000000000000002
[  133.081830][  T630] R13: 00000000690df577 R14: 0000000000499600 R15: 0000000000000000
| [  133.119154][  T630] refcount_t: underflow; use-after-free.
| [  133.119482][  T630] WARNING: CPU: 0 PID: 630 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  133.119986][  T630] Modules linked in: act_gact cls_flower sch_ingress bridge stp llc vrf veth
| [  133.121112][  T630] Tainted: [B]=BAD_PAGE
[  133.121343][  T630] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  133.121699][  T630] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  133.122075][  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 c5 a8 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 c5 a8 	mov    $0xffffffffa8c58d60,%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
[  133.123087][  T630] RSP: 0000:ffffc900013af1f0 EFLAGS: 00010286
[  133.123455][  T630] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  133.123870][  T630] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  133.124273][  T630] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff52be134
[  133.124709][  T630] R10: 0000000000000003 R11: ffffc900013aed80 R12: 0000000000000001
[  133.125325][  T630] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  133.125927][  T630] FS:  00007fcd71624800(0000) GS:ffff88808b7f2000(0000) knlGS:0000000000000000
[  133.126478][  T630] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  133.126825][  T630] CR2: 00007f1160b80d00 CR3: 000000001091d005 CR4: 0000000000772ef0
[  133.127271][  T630] PKRU: 55555554
[  133.127648][  T630] Call Trace:
[  133.127868][  T630]  <TASK>
[  133.128012][  T630]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  133.128307][  T630]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  133.128583][  T630]  ? generic_xdp_install (net/core/dev.c:11630)
[  133.128852][  T630]  ? kernfs_put.part.0 (./arch/x86/include/asm/atomic.h:67 ./include/linux/atomic/atomic-arch-fallback.h:2278 ./include/linux/atomic/atomic-instrumented.h:1384 fs/kernfs/dir.c:595)
[  133.129120][  T630]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  133.129413][  T630]  ? br_dev_delete (net/bridge/br_if.c:397) bridge
[  133.129753][  T630]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  133.130018][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  133.130422][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.130703][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.130974][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.131240][  T630]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  133.131704][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  133.132149][  T630]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  133.132505][  T630]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  133.132783][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  133.133048][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.133331][  T630]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  133.133600][  T630]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  133.133879][  T630]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  133.134155][  T630]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  133.134436][  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)
[  133.134707][  T630]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  133.135148][  T630]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  133.135432][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.135699][  T630]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  133.135966][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  133.136238][  T630]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  133.136519][  T630]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  133.136790][  T630]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  133.137063][  T630]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  133.137407][  T630]  ? __copy_msghdr (net/socket.c:2556)
[  133.137679][  T630]  ___sys_sendmsg (net/socket.c:2686)
[  133.137943][  T630]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  133.138223][  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)
[  133.138743][  T630]  ? copy_msghdr_from_user (net/socket.c:2673)
[  133.139015][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.139280][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  133.139560][  T630]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  133.139996][  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)
[  133.140273][  T630]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  133.140555][  T630]  __sys_sendmsg (net/socket.c:2716)
[  133.140831][  T630]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  133.141164][  T630]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  133.141618][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  133.141890][  T630]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  133.142158][  T630]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  133.142507][  T630] RIP: 0033:0x7fcd717f21d7
[  133.142972][  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)
[  133.144136][  T630] RSP: 002b:00007ffef87563f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  133.144573][  T630] RAX: ffffffffffffffda RBX: 00007ffef8756b20 RCX: 00007fcd717f21d7
[  133.144979][  T630] RDX: 0000000000000000 RSI: 00007ffef8756460 RDI: 0000000000000005
[  133.145403][  T630] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  133.145821][  T630] R10: 00007fcd716eef60 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