======================================
| [ 1869.443479][T23565] ==================================================================
| [ 1869.443669][T23565] 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))
| [ 1869.443801][T23565] Read of size 8 at addr ff1100000274b550 by task (udev-worker)/23565
| [ 1869.443924][T23565]
[ 1869.443979][T23565] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1869.443980][T23565] Call Trace:
[ 1869.443982][T23565]  <TASK>
[ 1869.443983][T23565]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[ 1869.443990][T23565]  print_address_description.constprop.0 (mm/kasan/report.c:378)
[ 1869.443995][T23565]  print_report (mm/kasan/report.c:482)
[ 1869.443997][T23565]  ? __virt_addr_valid (./include/linux/rcupdate.h:937 ./include/linux/mmzone.h:2281 arch/x86/mm/physaddr.c:54)
[ 1869.444000][T23565]  ? __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))
[ 1869.444002][T23565]  kasan_report (mm/kasan/report.c:595)
[ 1869.444006][T23565]  ? rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[ 1869.444007][T23565]  ? rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[ 1869.444009][T23565]  rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[ 1869.444011][T23565]  ? __asan_memcpy (mm/kasan/shadow.c:106 (discriminator 1))
[ 1869.444013][T23565]  rtnl_fill_ifinfo.isra.0 (net/core/rtnetlink.c:2088)
[ 1869.444015][T23565]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[ 1869.444018][T23565]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[ 1869.444021][T23565]  ? rtnl_fill_vf (./include/linux/skbuff.h:2720)
[ 1869.444022][T23565]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[ 1869.444023][T23565]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 1869.444026][T23565]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 1869.444028][T23565]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 1869.444030][T23565]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1869.444033][T23565]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 1869.444034][T23565]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[ 1869.444036][T23565]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[ 1869.444037][T23565]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 1869.444038][T23565]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[ 1869.444041][T23565]  rtnl_getlink (net/core/rtnetlink.c:4267)
[ 1869.444043][T23565]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1869.444045][T23565]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[ 1869.444046][T23565]  ? mark_usage (kernel/locking/lockdep.c:4674)
[ 1869.444047][T23565]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 1869.444049][T23565]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 1869.444055][T23565]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 1869.444057][T23565]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1869.444059][T23565]  ? mark_usage (kernel/locking/lockdep.c:4674)
[ 1869.444060][T23565]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 1869.444061][T23565]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 1869.444062][T23565]  ? bpf_address_lookup (kernel/bpf/core.c:729)
[ 1869.444066][T23565]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 1869.444067][T23565]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1869.444069][T23565]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[ 1869.444070][T23565]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 1869.444072][T23565]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[ 1869.444073][T23565]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7042)
[ 1869.444075][T23565]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[ 1869.444076][T23565]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[ 1869.444077][T23565]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 1869.444080][T23565]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 1869.444081][T23565]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1869.444083][T23565]  netlink_rcv_skb (net/netlink/af_netlink.c:2563)
[ 1869.444086][T23565]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[ 1869.444087][T23565]  ? netlink_ack (./include/linux/skbuff.h:2720 ./include/net/netlink.h:1020 net/netlink/af_netlink.c:2513)
[ 1869.444090][T23565]  ? 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))
[ 1869.444092][T23565]  ? 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))
[ 1869.444094][T23565]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[ 1869.444096][T23565]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[ 1869.444098][T23565]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[ 1869.444100][T23565]  netlink_sendmsg (net/netlink/af_netlink.c:1907)
[ 1869.444102][T23565]  ? netlink_unicast (./include/net/net_namespace.h:419 (discriminator 7))
[ 1869.444104][T23565]  ? __might_fault (mm/memory.c:7324 (discriminator 5))
[ 1869.444107][T23565]  ? __might_fault (mm/memory.c:7324 (discriminator 5))
[ 1869.444109][T23565]  __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[ 1869.444112][T23565]  ? __ia32_sys_getpeername (net/socket.c:2219)
[ 1869.444116][T23565]  ? fput_close_sync (fs/file_table.c:615)
[ 1869.444119][T23565]  ? alloc_file_clone (fs/file_table.c:477)
[ 1869.444121][T23565]  __x64_sys_sendto (net/socket.c:2272 net/socket.c:2268 net/socket.c:2268)
[ 1869.444122][T23565]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[ 1869.444125][T23565]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 1869.444127][T23565]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[ 1869.444129][T23565]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 1869.444130][T23565]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[ 1869.444132][T23565]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[ 1869.444133][T23565]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[ 1869.444136][T23565] RIP: 0033:0x7f2cd50fa08e
[ 1869.444139][T23565] 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
[ 1869.444141][T23565] RSP: 002b:00007ffe540030f0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[ 1869.444145][T23565] RAX: ffffffffffffffda RBX: 000055b878b54c60 RCX: 00007f2cd50fa08e
[ 1869.444146][T23565] RDX: 0000000000000020 RSI: 000055b8789f9dc0 RDI: 0000000000000012
[ 1869.444147][T23565] RBP: 00007ffe54003100 R08: 00007ffe54003150 R09: 0000000000000080
[ 1869.444148][T23565] R10: 0000000000000000 R11: 0000000000000202 R12: 000055b878b78c60


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