======================================
| [  658.718193][T12470] ==================================================================
| [  658.718366][T12470] BUG: KASAN: slab-use-after-free in rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
| [  658.718502][T12470] Read of size 8 at addr ff11000008164b50 by task (udev-worker)/12470
| [  658.718628][T12470]
[  658.718674][T12470] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  658.718676][T12470] Call Trace:
[  658.718678][T12470]  <TASK>
[  658.718679][T12470]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  658.718685][T12470]  print_address_description.constprop.0 (mm/kasan/report.c:378)
[  658.718690][T12470]  print_report (mm/kasan/report.c:482)
[  658.718692][T12470]  ? __virt_addr_valid (./include/linux/rcupdate.h:937 ./include/linux/mmzone.h:2281 arch/x86/mm/physaddr.c:54)
[  658.718696][T12470]  ? __virt_addr_valid (./include/linux/rcupdate.h:963 (discriminator 1) ./include/linux/mmzone.h:2291 (discriminator 1) arch/x86/mm/physaddr.c:54 (discriminator 1))
[  658.718698][T12470]  kasan_report (mm/kasan/report.c:595)
[  658.718702][T12470]  ? rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[  658.718705][T12470]  ? rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[  658.718707][T12470]  rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[  658.718709][T12470]  ? __asan_memcpy (mm/kasan/shadow.c:106 (discriminator 1))
[  658.718712][T12470]  rtnl_fill_ifinfo.isra.0 (net/core/rtnetlink.c:2087)
[  658.718715][T12470]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  658.718719][T12470]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  658.718722][T12470]  ? rtnl_fill_vf (./include/linux/skbuff.h:2718)
[  658.718724][T12470]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  658.718726][T12470]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  658.718730][T12470]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  658.718735][T12470]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  658.718737][T12470]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  658.718739][T12470]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  658.718741][T12470]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  658.718743][T12470]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  658.718746][T12470]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  658.718747][T12470]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[  658.718750][T12470]  rtnl_getlink (net/core/rtnetlink.c:4267)
[  658.718753][T12470]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  658.718755][T12470]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[  658.718757][T12470]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  658.718759][T12470]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  658.718761][T12470]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  658.718769][T12470]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  658.718771][T12470]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  658.718772][T12470]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  658.718774][T12470]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  658.718776][T12470]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  658.718778][T12470]  ? bpf_address_lookup (./include/linux/rcupdate.h:839 (discriminator 7) kernel/bpf/core.c:725 (discriminator 7))
[  658.718782][T12470]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  658.718784][T12470]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  658.718786][T12470]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[  658.718788][T12470]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  658.718790][T12470]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[  658.718792][T12470]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7042)
[  658.718794][T12470]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  658.718800][T12470]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[  658.718802][T12470]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  658.718805][T12470]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  658.718807][T12470]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  658.718809][T12470]  netlink_rcv_skb (net/netlink/af_netlink.c:2553)
[  658.718812][T12470]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[  658.718814][T12470]  ? netlink_ack (./include/linux/skbuff.h:2718)
[  658.718816][T12470]  ? netlink_deliver_tap (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[  658.718819][T12470]  ? netlink_deliver_tap (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[  658.718822][T12470]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[  658.718824][T12470]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[  658.718825][T12470]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  658.718828][T12470]  netlink_sendmsg (net/netlink/af_netlink.c:1897)
[  658.718830][T12470]  ? netlink_unicast (./include/net/net_namespace.h:419 (discriminator 7))
[  658.718831][T12470]  ? __might_fault (mm/memory.c:7324 (discriminator 5))
[  658.718835][T12470]  ? __might_fault (mm/memory.c:7324 (discriminator 5))
[  658.718838][T12470]  __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[  658.718841][T12470]  ? __ia32_sys_getpeername (net/socket.c:2219)
[  658.718845][T12470]  ? fput_close_sync (fs/file_table.c:615)
[  658.718849][T12470]  ? alloc_file_clone (fs/file_table.c:477)
[  658.718851][T12470]  __x64_sys_sendto (net/socket.c:2272 net/socket.c:2268 net/socket.c:2268)
[  658.718853][T12470]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  658.718856][T12470]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  658.718858][T12470]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[  658.718859][T12470]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  658.718861][T12470]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[  658.718862][T12470]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[  658.718864][T12470]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  658.718867][T12470] RIP: 0033:0x7f78febc908e
[  658.718870][T12470] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 94 bd 00 00       	call   0xbd9c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[  658.718872][T12470] RSP: 002b:00007ffc19a43250 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  658.718876][T12470] RAX: ffffffffffffffda RBX: 00005648d379b300 RCX: 00007f78febc908e
[  658.718877][T12470] RDX: 0000000000000020 RSI: 00005648d37af0b0 RDI: 0000000000000016
[  658.718878][T12470] RBP: 00007ffc19a43260 R08: 00007ffc19a432b0 R09: 0000000000000080
[  658.718879][T12470] R10: 0000000000000000 R11: 0000000000000202 R12: 00005648d391b880


Finger prints:
print_report:kasan_report:rtnl_fill_prop_list:rtnl_getlink:rtnetlink_rcv_msg