======================================
| [  292.446224][ T1678] ==================================================================
| [  292.446653][ T1678] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  292.447016][ T1678] Read of size 1 at addr ffff888009ef26ac by task ip/1678
| [  292.447272][ T1678]
[  292.447382][ T1678] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  292.447384][ T1678] Call Trace:
[  292.447389][ T1678]  <TASK>
[  292.447391][ T1678]  dump_stack_lvl (lib/dump_stack.c:123)
[  292.447399][ T1678]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  292.447413][ T1678]  ? kobject_put (lib/kobject.c:733)
[  292.447417][ T1678]  print_report (mm/kasan/report.c:483)
[  292.447420][ T1678]  ? kobject_put (lib/kobject.c:733)
[  292.447423][ T1678]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  292.447426][ T1678]  ? kobject_put (lib/kobject.c:733)
[  292.447430][ T1678]  kasan_report (mm/kasan/report.c:597)
[  292.447433][ T1678]  ? kobject_put (lib/kobject.c:733)
[  292.447439][ T1678]  kobject_put (lib/kobject.c:733)
[  292.447443][ T1678]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  292.447450][ T1678]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  292.447455][ T1678]  ? generic_xdp_install (net/core/dev.c:11630)
[  292.447459][ T1678]  ? 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)
[  292.447473][ T1678]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  292.447479][ T1678]  ? br_dev_delete (net/bridge/br_if.c:397) bridge
[  292.447528][ T1678]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  292.447537][ T1678]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  292.447555][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.447564][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.447570][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.447573][ T1678]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  292.447576][ T1678]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  292.447580][ T1678]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  292.447583][ T1678]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  292.447587][ T1678]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  292.447590][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.447597][ T1678]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  292.447601][ T1678]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  292.447604][ T1678]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  292.447611][ T1678]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  292.447613][ T1678]  ? 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)
[  292.447617][ T1678]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  292.447621][ T1678]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  292.447625][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.447630][ T1678]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  292.447634][ T1678]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  292.447638][ T1678]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  292.447647][ T1678]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  292.447650][ T1678]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  292.447661][ T1678]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  292.447664][ T1678]  ? __copy_msghdr (net/socket.c:2556)
[  292.447672][ T1678]  ___sys_sendmsg (net/socket.c:2686)
[  292.447675][ T1678]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  292.447678][ T1678]  ? __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)
[  292.447688][ T1678]  ? copy_msghdr_from_user (net/socket.c:2673)
[  292.447693][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.447697][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.447703][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.447707][ T1678]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  292.447715][ T1678]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  292.447721][ T1678]  __sys_sendmsg (net/socket.c:2716)
[  292.447724][ T1678]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  292.447728][ T1678]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  292.447735][ T1678]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  292.447739][ T1678]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  292.447745][ T1678]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  292.447754][ T1678] RIP: 0033:0x7fc11ec231d7
[  292.447759][ T1678] 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)
[  292.447763][ T1678] RSP: 002b:00007ffd12f93078 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  292.447772][ T1678] RAX: ffffffffffffffda RBX: 00007ffd12f937a0 RCX: 00007fc11ec231d7
[  292.447775][ T1678] RDX: 0000000000000000 RSI: 00007ffd12f930e0 RDI: 0000000000000005
[  292.447777][ T1678] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  292.447779][ T1678] R10: 00007fc11eb1ff60 R11: 0000000000000246 R12: 0000000000000002
[  292.447781][ T1678] R13: 00000000690de889 R14: 0000000000499600 R15: 0000000000000000
| [  292.489367][ T1678] refcount_t: underflow; use-after-free.
| [  292.489577][ T1678] WARNING: CPU: 1 PID: 1678 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  292.490044][ T1678] Modules linked in: act_gact cls_flower sch_ingress bridge stp llc vrf veth
| [  292.490935][ T1678] Tainted: [B]=BAD_PAGE
[  292.491063][ T1678] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  292.491288][ T1678] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  292.491519][ T1678] 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 85 bb 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 85 bb 	mov    $0xffffffffbb858d60,%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
[  292.492299][ T1678] RSP: 0018:ffffc90003ca71f0 EFLAGS: 00010286
[  292.492541][ T1678] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  292.492927][ T1678] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  292.493184][ T1678] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff783e134
[  292.493439][ T1678] R10: 0000000000000003 R11: ffffc90003ca6d80 R12: 0000000000000001
[  292.493813][ T1678] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  292.494111][ T1678] FS:  00007fc11ea55800(0000) GS:ffff888078c72000(0000) knlGS:0000000000000000
[  292.494410][ T1678] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  292.494726][ T1678] CR2: 000055aa40543dec CR3: 000000000ea4c006 CR4: 0000000000772ef0
[  292.495045][ T1678] PKRU: 55555554
[  292.495186][ T1678] Call Trace:
[  292.495328][ T1678]  <TASK>
[  292.495416][ T1678]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  292.495708][ T1678]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  292.495892][ T1678]  ? generic_xdp_install (net/core/dev.c:11630)
[  292.496053][ T1678]  ? 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)
[  292.496246][ T1678]  ? unregister_netdevice_many (net/core/dev.c:12241)
[  292.496413][ T1678]  ? br_dev_delete (net/bridge/br_if.c:397) bridge
[  292.496881][ T1678]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  292.497063][ T1678]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  292.497287][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.497469][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.497731][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.497909][ T1678]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  292.498070][ T1678]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  292.498242][ T1678]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  292.498569][ T1678]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  292.498753][ T1678]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  292.498920][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.499100][ T1678]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  292.499368][ T1678]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  292.499553][ T1678]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  292.499767][ T1678]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  292.499957][ T1678]  ? 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)
[  292.500230][ T1678]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  292.500394][ T1678]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  292.500597][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.500782][ T1678]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  292.501067][ T1678]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  292.501233][ T1678]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  292.501398][ T1678]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  292.501727][ T1678]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  292.501893][ T1678]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  292.502148][ T1678]  ? __copy_msghdr (net/socket.c:2556)
[  292.502317][ T1678]  ___sys_sendmsg (net/socket.c:2686)
[  292.502637][ T1678]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  292.502808][ T1678]  ? __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)
[  292.503010][ T1678]  ? copy_msghdr_from_user (net/socket.c:2673)
[  292.503207][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.503469][ T1678]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  292.503661][ T1678]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  292.503823][ T1678]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  292.503983][ T1678]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  292.504267][ T1678]  __sys_sendmsg (net/socket.c:2716)
[  292.504459][ T1678]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  292.504701][ T1678]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  292.504887][ T1678]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  292.505153][ T1678]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  292.505338][ T1678]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  292.505575][ T1678] RIP: 0033:0x7fc11ec231d7
[  292.505875][ T1678] 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)
[  292.506487][ T1678] RSP: 002b:00007ffd12f93078 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  292.506829][ T1678] RAX: ffffffffffffffda RBX: 00007ffd12f937a0 RCX: 00007fc11ec231d7
[  292.507089][ T1678] RDX: 0000000000000000 RSI: 00007ffd12f930e0 RDI: 0000000000000005
[  292.507343][ T1678] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  292.507743][ T1678] R10: 00007fc11eb1ff60 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