------------[ cut here ]------------ WARNING: CPU: 1 PID: 27382 at net/ipv6/route.c:4856 rt6_multipath_rebalance+0x455/0x8b0 net/ipv6/route.c:4856 Modules linked in: CPU: 1 UID: 0 PID: 27382 Comm: syz.0.6290 Not tainted 6.16.0-rc7-syzkaller-00100-gafd8c2c9e2e2 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:rt6_multipath_rebalance+0x455/0x8b0 net/ipv6/route.c:4856 Code: ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 85 fe ff ff 4c 89 e7 e8 0d 83 fd f7 e9 78 fe ff ff e8 93 71 9b f7 eb 05 e8 8c 71 9b f7 90 <0f> 0b 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 05 ce 4b 01 RSP: 0018:ffffc90004c3e680 EFLAGS: 00010283 RAX: ffffffff8a24b53d RBX: ffff888033853800 RCX: 0000000000080000 RDX: ffffc9000d28c000 RSI: 000000000005fbcd RDI: 000000000005fbce RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000987cc8 R12: ffff8880338538de R13: ffff888033853890 R14: 0000000000000000 R15: 1ffff1100670a712 FS: 00007f719537a6c0(0000) GS:ffff888125d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000280 CR3: 0000000033566000 CR4: 00000000003526f0 Call Trace: fib6_ifup+0x14a/0x180 net/ipv6/route.c:4872 fib6_clean_node+0x24a/0x590 net/ipv6/ip6_fib.c:2258 fib6_walk_continue+0x67b/0x910 net/ipv6/ip6_fib.c:2183 fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2231 fib6_clean_tree net/ipv6/ip6_fib.c:2311 [inline] __fib6_clean_all+0x234/0x380 net/ipv6/ip6_fib.c:2327 rt6_sync_up+0x128/0x160 net/ipv6/route.c:4890 addrconf_notify+0xd55/0x1010 net/ipv6/addrconf.c:3727 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 netif_state_change+0x284/0x3a0 net/core/dev.c:1584 do_setlink+0x35de/0x41c0 net/core/rtnetlink.c:3388 rtnl_group_changelink net/core/rtnetlink.c:3773 [inline] __rtnl_newlink net/core/rtnetlink.c:3927 [inline] rtnl_newlink+0x149f/0x1c70 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6944 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x759/0x8e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f719458e9a9 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:00007f719537a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f71947b5fa0 RCX: 00007f719458e9a9 RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000004 RBP: 00007f7194610d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f71947b5fa0 R15: 00007ffd96969b88