======================================
| [   18.359038][  T317] ==================================================================
| [   18.359327][  T317] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   18.359605][  T317] Read of size 1 at addr ffff88800abda69c by task ip/317
| [   18.359823][  T317]
[   18.359942][  T317] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.359944][  T317] Call Trace:
[   18.359946][  T317]  <TASK>
[   18.359947][  T317]  dump_stack_lvl (lib/dump_stack.c:123)
[   18.359952][  T317]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   18.359958][  T317]  ? kobject_put (lib/kobject.c:733)
[   18.359961][  T317]  print_report (mm/kasan/report.c:483)
[   18.359964][  T317]  ? kobject_put (lib/kobject.c:733)
[   18.359967][  T317]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   18.359970][  T317]  ? kobject_put (lib/kobject.c:733)
[   18.359972][  T317]  kasan_report (mm/kasan/report.c:597)
[   18.359975][  T317]  ? kobject_put (lib/kobject.c:733)
[   18.359980][  T317]  kobject_put (lib/kobject.c:733)
[   18.359983][  T317]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   18.359988][  T317]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   18.359991][  T317]  ? generic_xdp_install (net/core/dev.c:11630)
[   18.359995][  T317]  ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   18.359999][  T317]  ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67)
[   18.360005][  T317]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   18.360010][  T317]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   18.360029][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.360034][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.360039][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.360043][  T317]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   18.360046][  T317]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   18.360050][  T317]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   18.360053][  T317]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   18.360057][  T317]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   18.360060][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.360067][  T317]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   18.360070][  T317]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   18.360074][  T317]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   18.360080][  T317]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   18.360085][  T317]  ? 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)
[   18.360089][  T317]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   18.360093][  T317]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   18.360097][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.360102][  T317]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   18.360106][  T317]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   18.360109][  T317]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   18.360116][  T317]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   18.360119][  T317]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   18.360126][  T317]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   18.360129][  T317]  ? __copy_msghdr (net/socket.c:2556)
[   18.360136][  T317]  ___sys_sendmsg (net/socket.c:2686)
[   18.360138][  T317]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   18.360141][  T317]  ? __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)
[   18.360148][  T317]  ? copy_msghdr_from_user (net/socket.c:2673)
[   18.360152][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.360156][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.360161][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.360165][  T317]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   18.360168][  T317]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   18.360174][  T317]  __sys_sendmsg (net/socket.c:2716)
[   18.360176][  T317]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   18.360180][  T317]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   18.360186][  T317]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   18.360190][  T317]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   18.360195][  T317]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   18.360197][  T317] RIP: 0033:0x7f4b852841d7
[   18.360202][  T317] 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)
[   18.360204][  T317] RSP: 002b:00007ffeb18b7148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   18.360209][  T317] RAX: ffffffffffffffda RBX: 00007ffeb18b7870 RCX: 00007f4b852841d7
[   18.360211][  T317] RDX: 0000000000000000 RSI: 00007ffeb18b71b0 RDI: 0000000000000005
[   18.360212][  T317] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   18.360214][  T317] R10: 00007f4b85180f60 R11: 0000000000000246 R12: 0000000000000001
[   18.360216][  T317] R13: 00000000690dfe30 R14: 0000000000499600 R15: 0000000000000000
| [   18.394127][  T317] refcount_t: underflow; use-after-free.
| [   18.394345][  T317] WARNING: CPU: 3 PID: 317 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   18.394652][  T317] Modules linked in:
| [   18.395186][  T317] Tainted: [B]=BAD_PAGE
[   18.395321][  T317] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.395542][  T317] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   18.395777][  T317] Code: a2 b5 02 80 fb 01 0f 87 db 6e d8 fe 83 e3 01 0f 85 51 ff ff ff c6 05 c2 a2 b5 02 01 90 48 c7 c7 60 a8 e5 93 e8 72 c3 17 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 20 69 a0 ff e9 ba fe ff ff
All code
========
   0:	a2 b5 02 80 fb 01 0f 	movabs %al,0xdb870f01fb8002b5
   7:	87 db 
   9:	6e                   	outsb  %ds:(%rsi),(%dx)
   a:	d8 fe                	fdivr  %st(6),%st
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 c2 a2 b5 02 01 	movb   $0x1,0x2b5a2c2(%rip)        # 0x2b5a2de
  1c:	90                   	nop
  1d:	48 c7 c7 60 a8 e5 93 	mov    $0xffffffff93e5a860,%rdi
  24:	e8 72 c3 17 ff       	call   0xffffffffff17c39b
  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 20 69 a0 ff       	call   0xffffffffffa0695b
  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 20 69 a0 ff       	call   0xffffffffffa06931
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[   18.396400][  T317] RSP: 0018:ffffc90000d871f0 EFLAGS: 00010286
[   18.396620][  T317] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   18.396895][  T317] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   18.397146][  T317] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff28fe134
[   18.397414][  T317] R10: 0000000000000003 R11: ffffc90000d86d80 R12: 0000000000000001
[   18.397685][  T317] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   18.397956][  T317] FS:  00007f4b850b6800(0000) GS:ffff8880a0701000(0000) knlGS:0000000000000000
[   18.398278][  T317] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.398499][  T317] CR2: 0000563974d64dec CR3: 000000000c755003 CR4: 0000000000772ef0
[   18.398772][  T317] PKRU: 55555554
[   18.398907][  T317] Call Trace:
[   18.399045][  T317]  <TASK>
[   18.399136][  T317]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   18.399318][  T317]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   18.399497][  T317]  ? generic_xdp_install (net/core/dev.c:11630)
[   18.399683][  T317]  ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   18.399908][  T317]  ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67)
[   18.400090][  T317]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   18.400271][  T317]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   18.400504][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.400690][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.400872][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.401032][  T317]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   18.401205][  T317]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   18.401368][  T317]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   18.401584][  T317]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   18.401751][  T317]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   18.401910][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.402086][  T317]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   18.402245][  T317]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   18.402409][  T317]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   18.402573][  T317]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   18.402738][  T317]  ? 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)
[   18.402902][  T317]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   18.403061][  T317]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   18.403221][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.403392][  T317]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   18.403552][  T317]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   18.403719][  T317]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   18.403902][  T317]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   18.404061][  T317]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   18.404243][  T317]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   18.404440][  T317]  ? __copy_msghdr (net/socket.c:2556)
[   18.404612][  T317]  ___sys_sendmsg (net/socket.c:2686)
[   18.404795][  T317]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   18.404961][  T317]  ? __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)
[   18.405175][  T317]  ? copy_msghdr_from_user (net/socket.c:2673)
[   18.405341][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.405515][  T317]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.405686][  T317]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.405855][  T317]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   18.406023][  T317]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   18.406189][  T317]  __sys_sendmsg (net/socket.c:2716)
[   18.406350][  T317]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   18.406562][  T317]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   18.406732][  T317]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   18.406907][  T317]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   18.407087][  T317]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   18.407471][  T317] RIP: 0033:0x7f4b852841d7
[   18.407638][  T317] 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)
[   18.408346][  T317] RSP: 002b:00007ffeb18b7148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   18.408602][  T317] RAX: ffffffffffffffda RBX: 00007ffeb18b7870 RCX: 00007f4b852841d7
[   18.408875][  T317] RDX: 0000000000000000 RSI: 00007ffeb18b71b0 RDI: 0000000000000005
[   18.409325][  T317] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   18.409577][  T317] R10: 00007f4b85180f60 R11: 0000000000000246 R12: 0000000000000001


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