======================================
| [  157.630887][ T1213] ==================================================================
| [  157.631422][ T1213] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  157.631938][ T1213] Read of size 1 at addr ffff88800a37a6ac by task ip/1213
| [  157.632301][ T1213]
[  157.632435][ T1213] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  157.632441][ T1213] Call Trace:
[  157.632447][ T1213]  <TASK>
[  157.632449][ T1213]  dump_stack_lvl (lib/dump_stack.c:123)
[  157.632461][ T1213]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  157.632481][ T1213]  ? kobject_put (lib/kobject.c:733)
[  157.632485][ T1213]  print_report (mm/kasan/report.c:483)
[  157.632488][ T1213]  ? kobject_put (lib/kobject.c:733)
[  157.632492][ T1213]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  157.632495][ T1213]  ? kobject_put (lib/kobject.c:733)
[  157.632498][ T1213]  kasan_report (mm/kasan/report.c:597)
[  157.632507][ T1213]  ? kobject_put (lib/kobject.c:733)
[  157.632515][ T1213]  kobject_put (lib/kobject.c:733)
[  157.632520][ T1213]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  157.632536][ T1213]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  157.632543][ T1213]  ? generic_xdp_install (net/core/dev.c:11630)
[  157.632547][ T1213]  ? 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)
[  157.632565][ T1213]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  157.632572][ T1213]  ? br_dev_delete (net/bridge/br_if.c:397) bridge
[  157.632614][ T1213]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  157.632621][ T1213]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.632650][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.632675][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.632686][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.632692][ T1213]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  157.632696][ T1213]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.632703][ T1213]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.632709][ T1213]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  157.632715][ T1213]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.632720][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.632732][ T1213]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  157.632745][ T1213]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.632751][ T1213]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  157.632763][ T1213]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  157.632768][ T1213]  ? 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)
[  157.632776][ T1213]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  157.632783][ T1213]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  157.632790][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.632800][ T1213]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  157.632807][ T1213]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.632810][ T1213]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  157.632824][ T1213]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.632827][ T1213]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  157.632840][ T1213]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  157.632843][ T1213]  ? __copy_msghdr (net/socket.c:2556)
[  157.632853][ T1213]  ___sys_sendmsg (net/socket.c:2686)
[  157.632856][ T1213]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  157.632860][ T1213]  ? __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)
[  157.632877][ T1213]  ? copy_msghdr_from_user (net/socket.c:2673)
[  157.632882][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.632886][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.632892][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.632896][ T1213]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  157.632913][ T1213]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.632919][ T1213]  __sys_sendmsg (net/socket.c:2716)
[  157.632923][ T1213]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  157.632927][ T1213]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  157.632936][ T1213]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  157.632940][ T1213]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  157.632949][ T1213]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  157.632958][ T1213] RIP: 0033:0x7f170d1491d7
[  157.632965][ T1213] 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)
[  157.632968][ T1213] RSP: 002b:00007ffc526733d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  157.632981][ T1213] RAX: ffffffffffffffda RBX: 00007ffc52673b00 RCX: 00007f170d1491d7
[  157.632985][ T1213] RDX: 0000000000000000 RSI: 00007ffc52673440 RDI: 0000000000000005
[  157.632988][ T1213] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  157.632994][ T1213] R10: 00007f170d045f60 R11: 0000000000000246 R12: 0000000000000002
[  157.632997][ T1213] R13: 00000000690de467 R14: 0000000000499600 R15: 0000000000000000
| [  157.675083][ T1213] refcount_t: underflow; use-after-free.
| [  157.675420][ T1213] WARNING: CPU: 0 PID: 1213 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  157.675828][ T1213] Modules linked in: dummy sch_ingress bridge stp llc 8021q vrf veth
| [  157.676512][ T1213] Tainted: [B]=BAD_PAGE
[  157.676660][ T1213] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  157.676884][ T1213] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  157.677129][ T1213] 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 98 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 98 	mov    $0xffffffff98a58d60,%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
[  157.677809][ T1213] RSP: 0018:ffffc90000c071f0 EFLAGS: 00010286
[  157.678041][ T1213] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  157.678404][ T1213] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  157.678718][ T1213] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff327e134
[  157.678970][ T1213] R10: 0000000000000003 R11: ffffc90000c06d80 R12: 0000000000000001
[  157.679338][ T1213] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  157.679629][ T1213] FS:  00007f170cf7b800(0000) GS:ffff88809b9f2000(0000) knlGS:0000000000000000
[  157.679959][ T1213] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  157.680266][ T1213] CR2: 00007eff13d13000 CR3: 000000000dfef003 CR4: 0000000000772ef0
[  157.680572][ T1213] PKRU: 55555554
[  157.680760][ T1213] Call Trace:
[  157.680905][ T1213]  <TASK>
[  157.681001][ T1213]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  157.681282][ T1213]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  157.681473][ T1213]  ? generic_xdp_install (net/core/dev.c:11630)
[  157.681683][ T1213]  ? 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)
[  157.681914][ T1213]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  157.682105][ T1213]  ? br_dev_delete (net/bridge/br_if.c:397) bridge
[  157.682401][ T1213]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  157.682618][ T1213]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.682886][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.683077][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.683351][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.683544][ T1213]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  157.683734][ T1213]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.683919][ T1213]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  157.684151][ T1213]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  157.684422][ T1213]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.684606][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.684796][ T1213]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  157.684980][ T1213]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  157.685165][ T1213]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  157.685429][ T1213]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  157.685614][ T1213]  ? 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)
[  157.685809][ T1213]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  157.686000][ T1213]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  157.686256][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.686441][ T1213]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  157.686624][ T1213]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.686804][ T1213]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  157.686993][ T1213]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  157.687252][ T1213]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  157.687453][ T1213]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  157.687683][ T1213]  ? __copy_msghdr (net/socket.c:2556)
[  157.687875][ T1213]  ___sys_sendmsg (net/socket.c:2686)
[  157.688056][ T1213]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  157.688309][ T1213]  ? __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)
[  157.688544][ T1213]  ? copy_msghdr_from_user (net/socket.c:2673)
[  157.688723][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.688908][ T1213]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  157.689092][ T1213]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  157.689347][ T1213]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  157.689526][ T1213]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  157.689704][ T1213]  __sys_sendmsg (net/socket.c:2716)
[  157.689898][ T1213]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  157.690118][ T1213]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  157.690368][ T1213]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  157.690574][ T1213]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  157.690749][ T1213]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  157.690961][ T1213] RIP: 0033:0x7f170d1491d7
[  157.691148][ T1213] 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)
[  157.691908][ T1213] RSP: 002b:00007ffc526733d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  157.692169][ T1213] RAX: ffffffffffffffda RBX: 00007ffc52673b00 RCX: 00007f170d1491d7
[  157.692501][ T1213] RDX: 0000000000000000 RSI: 00007ffc52673440 RDI: 0000000000000005
[  157.692774][ T1213] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  157.693023][ T1213] R10: 00007f170d045f60 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