======================================
| [   27.172509][  T303] ==================================================================
| [   27.172927][  T303] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   27.173260][  T303] Read of size 1 at addr ffff8880089396ac by task ip/303
| [   27.173519][  T303]
[   27.173627][  T303] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.173630][  T303] Call Trace:
[   27.173634][  T303]  <TASK>
[   27.173636][  T303]  dump_stack_lvl (lib/dump_stack.c:123)
[   27.173644][  T303]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   27.173661][  T303]  ? kobject_put (lib/kobject.c:733)
[   27.173665][  T303]  print_report (mm/kasan/report.c:483)
[   27.173668][  T303]  ? kobject_put (lib/kobject.c:733)
[   27.173671][  T303]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   27.173674][  T303]  ? kobject_put (lib/kobject.c:733)
[   27.173677][  T303]  kasan_report (mm/kasan/report.c:597)
[   27.173681][  T303]  ? kobject_put (lib/kobject.c:733)
[   27.173687][  T303]  kobject_put (lib/kobject.c:733)
[   27.173691][  T303]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   27.173701][  T303]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   27.173705][  T303]  ? generic_xdp_install (net/core/dev.c:11630)
[   27.173708][  T303]  ? __netdev_upper_dev_unlink (net/core/dev.c:8973)
[   27.173721][  T303]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   27.173735][  T303]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.173753][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.173769][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.173776][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.173779][  T303]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   27.173784][  T303]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.173789][  T303]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.173792][  T303]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   27.173796][  T303]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.173798][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.173805][  T303]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   27.173813][  T303]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.173817][  T303]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   27.173823][  T303]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   27.173826][  T303]  ? 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)
[   27.173831][  T303]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   27.173835][  T303]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   27.173839][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.173844][  T303]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   27.173849][  T303]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.173852][  T303]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   27.173871][  T303]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.173878][  T303]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   27.173891][  T303]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   27.173894][  T303]  ? __copy_msghdr (net/socket.c:2556)
[   27.173904][  T303]  ___sys_sendmsg (net/socket.c:2686)
[   27.173907][  T303]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   27.173910][  T303]  ? __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)
[   27.173925][  T303]  ? copy_msghdr_from_user (net/socket.c:2673)
[   27.173930][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.173935][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.173940][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.173944][  T303]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   27.173960][  T303]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.173966][  T303]  __sys_sendmsg (net/socket.c:2716)
[   27.173969][  T303]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   27.173973][  T303]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   27.173981][  T303]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   27.173986][  T303]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   27.173994][  T303]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   27.174003][  T303] RIP: 0033:0x7f00f11651d7
[   27.174011][  T303] 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)
[   27.174015][  T303] RSP: 002b:00007ffe3f564958 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.174021][  T303] RAX: ffffffffffffffda RBX: 00007ffe3f565080 RCX: 00007f00f11651d7
[   27.174023][  T303] RDX: 0000000000000000 RSI: 00007ffe3f5649c0 RDI: 0000000000000005
[   27.174025][  T303] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   27.174027][  T303] R10: 00007f00f1061f60 R11: 0000000000000246 R12: 0000000000000001
[   27.174029][  T303] R13: 00000000690de49e R14: 0000000000499600 R15: 0000000000000000
| [   27.203618][  T303] refcount_t: underflow; use-after-free.
| [   27.203861][  T303] WARNING: CPU: 1 PID: 303 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   27.204190][  T303] Modules linked in: macvlan veth
| [   27.204784][  T303] Tainted: [B]=BAD_PAGE
[   27.204962][  T303] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.205272][  T303] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   27.205591][  T303] 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 65 92 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 65 92 	mov    $0xffffffff92658d60,%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
[   27.206366][  T303] RSP: 0018:ffffc900005571f0 EFLAGS: 00010286
[   27.206591][  T303] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   27.206963][  T303] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   27.207228][  T303] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff25fe134
[   27.207491][  T303] R10: 0000000000000003 R11: ffffc90000556d80 R12: 0000000000000001
[   27.207857][  T303] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   27.208126][  T303] FS:  00007f00f0f97800(0000) GS:ffff8880a1e72000(0000) knlGS:0000000000000000
[   27.208530][  T303] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.208760][  T303] CR2: 00000000004e53a8 CR3: 000000000a39a005 CR4: 0000000000772ef0
[   27.209036][  T303] PKRU: 55555554
[   27.209177][  T303] Call Trace:
[   27.209403][  T303]  <TASK>
[   27.209496][  T303]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   27.209680][  T303]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   27.209871][  T303]  ? generic_xdp_install (net/core/dev.c:11630)
[   27.210153][  T303]  ? __netdev_upper_dev_unlink (net/core/dev.c:8973)
[   27.210386][  T303]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   27.210561][  T303]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.210795][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.211076][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.211262][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.211440][  T303]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   27.211618][  T303]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.211898][  T303]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   27.212122][  T303]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   27.212305][  T303]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.212482][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.212760][  T303]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   27.212946][  T303]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   27.213118][  T303]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   27.213309][  T303]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   27.213579][  T303]  ? 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)
[   27.213757][  T303]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   27.213951][  T303]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   27.214130][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.214411][  T303]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   27.214620][  T303]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.214861][  T303]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   27.215251][  T303]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   27.215432][  T303]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   27.215613][  T303]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   27.215864][  T303]  ? __copy_msghdr (net/socket.c:2556)
[   27.216143][  T303]  ___sys_sendmsg (net/socket.c:2686)
[   27.216328][  T303]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   27.216516][  T303]  ? __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)
[   27.216759][  T303]  ? copy_msghdr_from_user (net/socket.c:2673)
[   27.217042][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.217227][  T303]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   27.217405][  T303]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   27.217577][  T303]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   27.217854][  T303]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   27.218037][  T303]  __sys_sendmsg (net/socket.c:2716)
[   27.218219][  T303]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   27.218437][  T303]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   27.218707][  T303]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   27.218891][  T303]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   27.219074][  T303]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   27.219303][  T303] RIP: 0033:0x7f00f11651d7
[   27.219591][  T303] 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)
[   27.220334][  T303] RSP: 002b:00007ffe3f564958 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.220609][  T303] RAX: ffffffffffffffda RBX: 00007ffe3f565080 RCX: 00007f00f11651d7
[   27.220899][  T303] RDX: 0000000000000000 RSI: 00007ffe3f5649c0 RDI: 0000000000000005
[   27.221273][  T303] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   27.221538][  T303] R10: 00007f00f1061f60 R11: 0000000000000246 R12: 0000000000000001


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