======================================
| [  769.086365][ T7903] ==================================================================
| [  769.086508][ T7903] 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))
| [  769.086633][ T7903] Read of size 8 at addr ff11000015199750 by task teamd/7903
| [  769.086747][ T7903]
[  769.086791][ T7903] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  769.086793][ T7903] Call Trace:
[  769.086794][ T7903]  <TASK>
[  769.086795][ T7903]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  769.086801][ T7903]  print_address_description.constprop.0 (mm/kasan/report.c:378)
[  769.086806][ T7903]  print_report (mm/kasan/report.c:482)
[  769.086808][ T7903]  ? __virt_addr_valid (./include/linux/rcupdate.h:937 ./include/linux/mmzone.h:2281 arch/x86/mm/physaddr.c:54)
[  769.086812][ T7903]  ? __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))
[  769.086814][ T7903]  kasan_report (mm/kasan/report.c:595)
[  769.086817][ T7903]  ? rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[  769.086819][ T7903]  ? rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[  769.086821][ T7903]  rtnl_fill_prop_list (net/core/rtnetlink.c:1949 (discriminator 12) net/core/rtnetlink.c:1970 (discriminator 12))
[  769.086823][ T7903]  ? __asan_memcpy (mm/kasan/shadow.c:106 (discriminator 1))
[  769.086825][ T7903]  rtnl_fill_ifinfo.isra.0 (net/core/rtnetlink.c:2087)
[  769.086828][ T7903]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  769.086830][ T7903]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  769.086833][ T7903]  ? rtnl_fill_vf (./include/linux/skbuff.h:2718)
[  769.086834][ T7903]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  769.086835][ T7903]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  769.086839][ T7903]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[  769.086841][ T7903]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  769.086842][ T7903]  ? rtnl_fill_vfinfo (net/core/rtnetlink.c:1626)
[  769.086844][ T7903]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  769.086846][ T7903]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  769.086848][ T7903]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  769.086850][ T7903]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  769.086852][ T7903]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  769.086853][ T7903]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  769.086854][ T7903]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[  769.086856][ T7903]  rtnl_getlink (net/core/rtnetlink.c:4267)
[  769.086859][ T7903]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  769.086860][ T7903]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[  769.086862][ T7903]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  769.086863][ T7903]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  769.086864][ T7903]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  769.086872][ T7903]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  769.086873][ T7903]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  769.086875][ T7903]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  769.086876][ T7903]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  769.086877][ T7903]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  769.086879][ T7903]  ? bpf_address_lookup (kernel/bpf/core.c:734)
[  769.086882][ T7903]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  769.086883][ T7903]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  769.086885][ T7903]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[  769.086886][ T7903]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  769.086888][ T7903]  ? rtnl_dump_ifinfo (net/core/rtnetlink.c:2504)
[  769.086890][ T7903]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7042)
[  769.086891][ T7903]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  769.086893][ T7903]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[  769.086894][ T7903]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  769.086896][ T7903]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  769.086897][ T7903]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  769.086899][ T7903]  netlink_rcv_skb (net/netlink/af_netlink.c:2553)
[  769.086902][ T7903]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[  769.086904][ T7903]  ? netlink_ack (./include/linux/skbuff.h:2718)
[  769.086907][ T7903]  ? 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))
[  769.086908][ T7903]  ? 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))
[  769.086911][ T7903]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[  769.086913][ T7903]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[  769.086914][ T7903]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  769.086917][ T7903]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  769.086919][ T7903]  netlink_sendmsg (net/netlink/af_netlink.c:1897)
[  769.086921][ T7903]  ? netlink_unicast (./include/net/net_namespace.h:419 (discriminator 7))
[  769.086923][ T7903]  ? __might_fault (mm/memory.c:7324 (discriminator 5))
[  769.086928][ T7903]  ____sys_sendmsg (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2698 (discriminator 4))
[  769.086931][ T7903]  ? copy_msghdr_from_user (net/socket.c:2635)
[  769.086933][ T7903]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5349)
[  769.086934][ T7903]  ? move_addr_to_kernel (net/socket.c:258)
[  769.086938][ T7903]  ___sys_sendmsg (net/socket.c:2752)
[  769.086940][ T7903]  ? copy_msghdr_from_user (net/socket.c:2603)
[  769.086941][ T7903]  ? kfree (mm/slub.c:6551 (discriminator 1))
[  769.086948][ T7903]  __sys_sendmsg (net/socket.c:2784)
[  769.086950][ T7903]  ? __sys_sendmsg_sock (net/socket.c:2765)
[  769.086954][ T7903]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  769.086956][ T7903]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  769.086958][ T7903]  ? irq_exit_rcu (kernel/softirq.c:754)
[  769.086960][ T7903]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  769.086963][ T7903] RIP: 0033:0x7f922b84808e
[  769.086966][ T7903] 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
[  769.086968][ T7903] RSP: 002b:00007ffeabf49c20 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[  769.086971][ T7903] RAX: ffffffffffffffda RBX: 00005650b87a5330 RCX: 00007f922b84808e
[  769.086973][ T7903] RDX: 0000000000000000 RSI: 00007ffeabf49cc0 RDI: 0000000000000005
[  769.086974][ T7903] RBP: 00007ffeabf49c30 R08: 0000000000000000 R09: 0000000000000000
[  769.086974][ T7903] R10: 0000000000000000 R11: 0000000000000202 R12: 00005650b87acb30


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