======================================
| [  330.808067][ T1576] ==================================================================
| [  330.808557][ T1576] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [  330.809010][ T1576] Read of size 1 at addr ffff888009e596ac by task ip/1576
| [  330.809348][ T1576]
[  330.809506][ T1576] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  330.809513][ T1576] Call Trace:
[  330.809518][ T1576]  <TASK>
[  330.809522][ T1576]  dump_stack_lvl (lib/dump_stack.c:123)
[  330.809532][ T1576]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[  330.809542][ T1576]  ? kobject_put (lib/kobject.c:733)
[  330.809550][ T1576]  print_report (mm/kasan/report.c:483)
[  330.809555][ T1576]  ? kobject_put (lib/kobject.c:733)
[  330.809560][ T1576]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[  330.809566][ T1576]  ? kobject_put (lib/kobject.c:733)
[  330.809571][ T1576]  kasan_report (mm/kasan/report.c:597)
[  330.809576][ T1576]  ? kobject_put (lib/kobject.c:733)
[  330.809586][ T1576]  kobject_put (lib/kobject.c:733)
[  330.809592][ T1576]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  330.809603][ T1576]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  330.809609][ T1576]  ? generic_xdp_install (net/core/dev.c:11630)
[  330.809616][ T1576]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  330.809628][ T1576]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  330.809637][ T1576]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  330.809675][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.809686][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.809696][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.809703][ T1576]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  330.809708][ T1576]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  330.809716][ T1576]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  330.809721][ T1576]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  330.809728][ T1576]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  330.809732][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.809742][ T1576]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  330.809750][ T1576]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  330.809756][ T1576]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  330.809769][ T1576]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  330.809774][ T1576]  ? 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)
[  330.809782][ T1576]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  330.809790][ T1576]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  330.809796][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.809804][ T1576]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  330.809812][ T1576]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  330.809822][ T1576]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  330.809833][ T1576]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  330.809840][ T1576]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  330.809853][ T1576]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  330.809858][ T1576]  ? __copy_msghdr (net/socket.c:2556)
[  330.809871][ T1576]  ___sys_sendmsg (net/socket.c:2686)
[  330.809876][ T1576]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  330.809883][ T1576]  ? __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)
[  330.809894][ T1576]  ? copy_msghdr_from_user (net/socket.c:2673)
[  330.809903][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.809911][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.809921][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.809928][ T1576]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  330.809936][ T1576]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  330.809948][ T1576]  __sys_sendmsg (net/socket.c:2716)
[  330.809953][ T1576]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  330.809960][ T1576]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  330.809973][ T1576]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  330.809981][ T1576]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  330.809990][ T1576]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  330.809997][ T1576] RIP: 0033:0x7fac72c8c1d7
[  330.810007][ T1576] 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)
[  330.810013][ T1576] RSP: 002b:00007ffe3324c5b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  330.810020][ T1576] RAX: ffffffffffffffda RBX: 00007ffe3324cce0 RCX: 00007fac72c8c1d7
[  330.810024][ T1576] RDX: 0000000000000000 RSI: 00007ffe3324c620 RDI: 0000000000000005
[  330.810027][ T1576] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  330.810030][ T1576] R10: 00007fac72b88f60 R11: 0000000000000246 R12: 0000000000000002
[  330.810033][ T1576] R13: 00000000690df35c R14: 0000000000499600 R15: 0000000000000000
| [  330.846040][ T1576] refcount_t: underflow; use-after-free.
| [  330.846260][ T1576] WARNING: CPU: 1 PID: 1576 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [  330.846657][ T1576] Modules linked in: cls_flower act_mirred 8021q bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth
| [  330.847793][ T1576] Tainted: [B]=BAD_PAGE
[  330.847996][ T1576] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  330.848292][ T1576] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[  330.848859][ T1576] 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 b0 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 b0 	mov    $0xffffffffb0858d60,%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
[  330.850015][ T1576] RSP: 0018:ffffc900028671f0 EFLAGS: 00010286
[  330.850356][ T1576] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  330.850773][ T1576] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[  330.851353][ T1576] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff623e134
[  330.851767][ T1576] R10: 0000000000000003 R11: ffffc90002866d80 R12: 0000000000000001
[  330.852173][ T1576] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[  330.852767][ T1576] FS:  00007fac72abe800(0000) GS:ffff888083c72000(0000) knlGS:0000000000000000
[  330.853114][ T1576] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  330.853409][ T1576] CR2: 00000000004e6e70 CR3: 0000000009a20006 CR4: 0000000000772ef0
[  330.853680][ T1576] PKRU: 55555554
[  330.853807][ T1576] Call Trace:
[  330.853930][ T1576]  <TASK>
[  330.854013][ T1576]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[  330.854275][ T1576]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[  330.854436][ T1576]  ? generic_xdp_install (net/core/dev.c:11630)
[  330.854619][ T1576]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  330.854786][ T1576]  rtnl_dellink (net/core/rtnetlink.c:3580)
[  330.855048][ T1576]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  330.855253][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.855420][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.855711][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.855872][ T1576]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  330.856028][ T1576]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  330.856193][ T1576]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[  330.856492][ T1576]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  330.856668][ T1576]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  330.856828][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.856991][ T1576]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  330.857240][ T1576]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  330.857407][ T1576]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  330.857591][ T1576]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  330.857753][ T1576]  ? 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)
[  330.858019][ T1576]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  330.858181][ T1576]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  330.858353][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.858558][ T1576]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  330.858826][ T1576]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  330.858995][ T1576]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  330.859169][ T1576]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  330.859351][ T1576]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  330.859638][ T1576]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  330.859855][ T1576]  ? __copy_msghdr (net/socket.c:2556)
[  330.860028][ T1576]  ___sys_sendmsg (net/socket.c:2686)
[  330.860188][ T1576]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  330.860456][ T1576]  ? __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)
[  330.860682][ T1576]  ? copy_msghdr_from_user (net/socket.c:2673)
[  330.860863][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.861032][ T1576]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  330.861295][ T1576]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  330.861460][ T1576]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  330.861640][ T1576]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  330.861806][ T1576]  __sys_sendmsg (net/socket.c:2716)
[  330.862058][ T1576]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  330.862263][ T1576]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  330.862438][ T1576]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  330.862719][ T1576]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  330.862895][ T1576]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  330.863095][ T1576] RIP: 0033:0x7fac72c8c1d7
[  330.863273][ T1576] 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)
[  330.863994][ T1576] RSP: 002b:00007ffe3324c5b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  330.864347][ T1576] RAX: ffffffffffffffda RBX: 00007ffe3324cce0 RCX: 00007fac72c8c1d7
[  330.864613][ T1576] RDX: 0000000000000000 RSI: 00007ffe3324c620 RDI: 0000000000000005
[  330.864866][ T1576] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[  330.865232][ T1576] R10: 00007fac72b88f60 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