[Android 5.10] BUG: Address fc00:: on device lo is missing its host route.

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: e334a66065d3 Merge 5.10.264 into android13-5.10-lts
git tree: android13-5.10-lts
console+strace: https://syzkaller.appspot.com/x/log.txt?x=16d66949580000
kernel config: https://syzkaller.appspot.com/x/.config?x=57bdfa4a173e5087
dashboard link: https://syzkaller.appspot.com/bug?extid=db8234f8e817a76617e6
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=117cc279580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15421279580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e40f9bd31ba6/disk-e334a660.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ff25a46f2c72/vmlinux-e334a660.xz
kernel image: https://storage.googleapis.com/syzbot-assets/81f10a152c93/bzImage-e334a660.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+db8234...@syzkaller.appspotmail.com

IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.
IPv6: BUG: Address fc00:: on device lo is missing its host route.


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