BUG: Address IPV6ADDR on device lo is missing its host route.

Status: upstream: reported C repro on 2026/09/27 00:41
Reported-by: syzbot+545be9700ca8b909c672@syzkaller.appspotmail.com
First crash: 4d19h, last: 4d19h
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: Address IPV6ADDR on device lo is missing its host route. -1 syz, C 76 12h19m 10d 0/2 upstream: reported C repro on 2026/09/21 01:01
linux-6.6 BUG: Address IPV6ADDR on device lo is missing its host route. -1 2 22h16m 5d11h 0/2 upstream: reported on 2026/09/26 09:21
android-6-1 BUG: Address IPV6ADDR on device lo is missing its host route. origin:upstream -1 syz, C 1 6d04h 6d04h 0/2 upstream: reported C repro on 2026/09/25 16:37
linux-6.1 BUG: Address IPV6ADDR on device lo is missing its host route. -1 syz, C 12 20h19m 3d22h 0/3 upstream: reported C repro on 2026/09/27 22:20
linux-5.15 BUG: Address IPV6ADDR on device lo is missing its host route. -1 1 27d 27d 0/3 upstream: reported on 2026/09/04 13:28

Sample crash report:
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.

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/27 00:40 android13-5.15-lts 776976664f31 a3c7249d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: Address IPV6ADDR on device lo is missing its host route.
* Struck through repros no longer work on HEAD.