netlink: 'syz.1.11726': attribute type 13 has an invalid length.
netlink: 'syz.1.11726': attribute type 17 has an invalid length.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 32311 at net/ipv6/route.c:4857 rt6_multipath_rebalance+0x455/0x8b0
Modules linked in:
CPU: 0 UID: 0 PID: 32311 Comm: syz.1.11726 Not tainted 6.16.0-syzkaller-06620-gae633388cae3-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:rt6_multipath_rebalance+0x455/0x8b0
Code: ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 85 fe ff ff 4c 89 e7 e8 bd bf fb f7 e9 78 fe ff ff e8 53 9d 98 f7 eb 05 e8 4c 9d 98 f7 90 <0f> 0b 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc9000867e560 EFLAGS: 00010283
RAX: ffffffff8a27135d RBX: ffff88811d317c00 RCX: 0000000000080000
RDX: ffffc90003a5a000 RSI: 0000000000002431 RDI: 0000000000002432
RBP: dffffc0000000000 R08: ffff88810ddd9cc0 R09: 0000000000000003
R10: 0000000000000006 R11: 0000000000000002 R12: ffff88811d317cde
R13: ffff88811d317c90 R14: 0000000000000000 R15: 1ffff11023a62f92
FS:  00007fbb41e5d6c0(0000) GS:ffff8880b8680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000037126000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 fib6_ifdown+0x2fe/0x4c0
 fib6_clean_node+0x24d/0x590
 fib6_walk_continue+0x67b/0x910
 fib6_walk+0x149/0x290
 __fib6_clean_all+0x234/0x380
 rt6_sync_down_dev+0xf9/0x150
 addrconf_notify+0x929/0x1010
 notifier_call_chain+0x1b6/0x3e0
 __dev_notify_flags+0x21b/0x2e0
 netif_change_flags+0xe8/0x1a0
 do_setlink+0xc55/0x41c0
 rtnl_newlink+0x149f/0x1c70
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbb40f8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbb41e5d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbb411b5fa0 RCX: 00007fbb40f8ebe9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: 000000000000000c
RBP: 00007fbb41011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbb411b6038 R14: 00007fbb411b5fa0 R15: 00007ffe083dfc88
 </TASK>
