======================================
| [   19.676746][  T309] ==================================================================
| [   19.677059][  T309] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   19.677341][  T309] Read of size 1 at addr ffff8880085d46c4 by task ip/309
| [   19.677594][  T309]
[   19.677698][  T309] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.677703][  T309] Call Trace:
[   19.677706][  T309]  <TASK>
[   19.677708][  T309]  dump_stack_lvl (lib/dump_stack.c:123)
[   19.677724][  T309]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   19.677752][  T309]  ? kobject_put (lib/kobject.c:733)
[   19.677756][  T309]  print_report (mm/kasan/report.c:483)
[   19.677759][  T309]  ? kobject_put (lib/kobject.c:733)
[   19.677762][  T309]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   19.677766][  T309]  ? kobject_put (lib/kobject.c:733)
[   19.677769][  T309]  kasan_report (mm/kasan/report.c:597)
[   19.677773][  T309]  ? kobject_put (lib/kobject.c:733)
[   19.677778][  T309]  kobject_put (lib/kobject.c:733)
[   19.677782][  T309]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   19.677792][  T309]  ? __rtnl_newlink (net/core/rtnetlink.c:3957)
[   19.677796][  T309]  ? generic_xdp_install (net/core/dev.c:11630)
[   19.677804][  T309]  rtnl_newlink (net/core/rtnetlink.c:301 net/core/rtnetlink.c:4076)
[   19.677809][  T309]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   19.677816][  T309]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   19.677819][  T309]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.677830][  T309]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   19.677833][  T309]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   19.677838][  T309]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.677841][  T309]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.677847][  T309]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   19.677853][  T309]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.677857][  T309]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   19.677863][  T309]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   19.677866][  T309]  ? 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)
[   19.677869][  T309]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   19.677873][  T309]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   19.677876][  T309]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.677881][  T309]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   19.677885][  T309]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.677888][  T309]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   19.677900][  T309]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.677903][  T309]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   19.677907][  T309]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   19.677910][  T309]  ? __copy_msghdr (net/socket.c:2556)
[   19.677915][  T309]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.677918][  T309]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.677925][  T309]  ___sys_sendmsg (net/socket.c:2686)
[   19.677928][  T309]  ? __debug_check_no_obj_freed (lib/debugobjects.c:1110)
[   19.677936][  T309]  ? copy_msghdr_from_user (net/socket.c:2673)
[   19.677940][  T309]  ? debug_objects_oom (lib/debugobjects.c:1070)
[   19.677944][  T309]  ? trace_rcu_segcb_stats (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751 ./include/trace/events/rcu.h:537)
[   19.677949][  T309]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.677952][  T309]  ? kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 1))
[   19.677956][  T309]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   19.677966][  T309]  ? kmem_cache_free (mm/slub.c:6630 mm/slub.c:6740)
[   19.677972][  T309]  ? do_sys_openat2 (fs/open.c:1422)
[   19.677977][  T309]  ? do_sys_openat2 (fs/open.c:1422)
[   19.677982][  T309]  __sys_sendmsg (net/socket.c:2716)
[   19.677986][  T309]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   19.677992][  T309]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.677997][  T309]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   19.678002][  T309]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   19.678014][  T309] RIP: 0033:0x7fa41aa2e1d7
[   19.678027][  T309] 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)
[   19.678034][  T309] RSP: 002b:00007ffe1df33f88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.678044][  T309] RAX: ffffffffffffffda RBX: 00007ffe1df346b0 RCX: 00007fa41aa2e1d7
[   19.678046][  T309] RDX: 0000000000000000 RSI: 00007ffe1df33ff0 RDI: 0000000000000005
[   19.678048][  T309] RBP: 0000000000000002 R08: 0000000000000044 R09: 0000000000000000
[   19.678050][  T309] R10: 00007fa41a925770 R11: 0000000000000246 R12: 00007ffe1df346c8
[   19.678052][  T309] R13: 00000000690df603 R14: 0000000000499600 R15: 00007ffe1df340d8
| [   19.707309][  T309] refcount_t: underflow; use-after-free.
| [   19.707654][  T309] WARNING: CPU: 1 PID: 309 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   19.708041][  T309] Modules linked in:
| [   19.708575][  T309] Tainted: [B]=BAD_PAGE
[   19.708802][  T309] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.709023][  T309] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   19.709339][  T309] 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 65 a2 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 65 a2 	mov    $0xffffffffa265ba40,%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
[   19.710036][  T309] RSP: 0018:ffffc90000d974a0 EFLAGS: 00010282
[   19.710280][  T309] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   19.710563][  T309] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   19.710928][  T309] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff46c0934
[   19.711242][  T309] R10: 0000000000000003 R11: ffffc90000d97040 R12: 0000000000000001
[   19.711512][  T309] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   19.711857][  T309] FS:  00007fa41a860800(0000) GS:ffff8880c2188000(0000) knlGS:0000000000000000
[   19.712189][  T309] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.712442][  T309] CR2: 00007ffe1df30ee0 CR3: 0000000008727004 CR4: 0000000000772ef0
[   19.712795][  T309] PKRU: 55555554
[   19.712963][  T309] Call Trace:
[   19.713100][  T309]  <TASK>
[   19.713196][  T309]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   19.713405][  T309]  ? __rtnl_newlink (net/core/rtnetlink.c:3957)
[   19.713622][  T309]  ? generic_xdp_install (net/core/dev.c:11630)
[   19.713900][  T309]  rtnl_newlink (net/core/rtnetlink.c:301 net/core/rtnetlink.c:4076)
[   19.714091][  T309]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   19.714277][  T309]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   19.714470][  T309]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.714669][  T309]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   19.714913][  T309]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   19.715108][  T309]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.715318][  T309]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.715493][  T309]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   19.715692][  T309]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.715934][  T309]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   19.716160][  T309]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   19.716333][  T309]  ? 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)
[   19.716539][  T309]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   19.716807][  T309]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   19.717003][  T309]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.717210][  T309]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   19.717443][  T309]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.717635][  T309]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   19.717895][  T309]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.718079][  T309]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   19.718266][  T309]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   19.718501][  T309]  ? __copy_msghdr (net/socket.c:2556)
[   19.718778][  T309]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.718982][  T309]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.719166][  T309]  ___sys_sendmsg (net/socket.c:2686)
[   19.719339][  T309]  ? __debug_check_no_obj_freed (lib/debugobjects.c:1110)
[   19.719557][  T309]  ? copy_msghdr_from_user (net/socket.c:2673)
[   19.719820][  T309]  ? debug_objects_oom (lib/debugobjects.c:1070)
[   19.720058][  T309]  ? trace_rcu_segcb_stats (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751 ./include/trace/events/rcu.h:537)
[   19.720261][  T309]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.720449][  T309]  ? kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 1))
[   19.720670][  T309]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   19.720949][  T309]  ? kmem_cache_free (mm/slub.c:6630 mm/slub.c:6740)
[   19.721125][  T309]  ? do_sys_openat2 (fs/open.c:1422)
[   19.721325][  T309]  ? do_sys_openat2 (fs/open.c:1422)
[   19.721553][  T309]  __sys_sendmsg (net/socket.c:2716)
[   19.721809][  T309]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   19.721976][  T309]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.722168][  T309]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   19.722411][  T309]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   19.722846][  T309] RIP: 0033:0x7fa41aa2e1d7
[   19.723059][  T309] 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)
[   19.723887][  T309] RSP: 002b:00007ffe1df33f88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.724159][  T309] RAX: ffffffffffffffda RBX: 00007ffe1df346b0 RCX: 00007fa41aa2e1d7
[   19.724441][  T309] RDX: 0000000000000000 RSI: 00007ffe1df33ff0 RDI: 0000000000000005
[   19.724902][  T309] RBP: 0000000000000002 R08: 0000000000000044 R09: 0000000000000000
[   19.725154][  T309] R10: 00007fa41a925770 R11: 0000000000000246 R12: 00007ffe1df346c8


Finger prints:
refcount_warn_saturate:netdev_run_todo:rtnl_newlink:rtnetlink_rcv_msg:netlink_rcv_skb
print_report:kasan_report:kobject_put:netdev_run_todo:rtnl_newlink