syzbot

------------[ cut here ]------------
WARNING: CPU: 1 PID: 6949 at include/net/ip6_fib.h:332 fib6_info_release include/net/ip6_fib.h:332 [inline]
WARNING: CPU: 1 PID: 6949 at include/net/ip6_fib.h:332 ip6_route_add+0x1c8/0x1f0 net/ipv6/route.c:3848
Modules linked in:
CPU: 1 PID: 6949 Comm: syz-executor.4 Not tainted 6.7.0-rc3-syzkaller-00805-g5a08d0065a91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:fib6_info_release include/net/ip6_fib.h:332 [inline]
RIP: 0010:ip6_route_add+0x1c8/0x1f0 net/ipv6/route.c:3848
Code: 4c 89 ef e8 ca 33 2b fb e9 4f ff ff ff e8 70 a4 50 f8 41 89 dc e9 42 ff ff ff e8 63 85 a7 f8 e9 78 ff ff ff e8 59 a4 50 f8 90 <0f> 0b 90 eb 83 e8 4e a4 50 f8 90 0f 0b 90 eb 9f 48 89 df e8 60 85
RSP: 0018:ffffc90004d3f318 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88807cc74000 RCX: ffffffff8936ed7c
RDX: ffff8880292e9dc0 RSI: ffffffff8936edf7 RDI: 0000000000000005
RBP: 0000000000400000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000400000 R11: 0000000000000001 R12: 00000000ffffffef
R13: ffff88807cc7402c R14: ffff888028ff9c18 R15: ffff88807f0fc800
FS:  00007fbdde9706c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562fc6964008 CR3: 0000000079c87000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 addrconf_prefix_route+0x2fe/0x510 net/ipv6/addrconf.c:2445
 inet6_addr_modify net/ipv6/addrconf.c:4861 [inline]
 inet6_rtm_newaddr+0xea1/0x1ab0 net/ipv6/addrconf.c:4992
 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6566
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2544
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fbdddc7cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbdde9700c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbdddd9c120 RCX: 00007fbdddc7cba9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000004
RBP: 00007fbdddcc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbdddd9c120 R15: 00007ffe11ca67e8
 </TASK>