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

Status: upstream: reported C repro on 2026/09/04 13:28
Reported-by: syzbot+08a669c93f7bf94a5a4a@syzkaller.appspotmail.com
First crash: 41d, last: 8h52m
▶ ▼ 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 90 1d04h 25d 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 4 12d 19d 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 11 3h01m 20d 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 14 3d16h 18d 0/3 upstream: reported C repro on 2026/09/27 22:20
android-5-15 BUG: Address IPV6ADDR on device lo is missing its host route. -1 syz, C 22 8h19m 19d 0/2 upstream: reported C repro on 2026/09/27 00:41

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.

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/13 03:11 linux-5.15.y a051a4bf909f 745a967f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan BUG: Address IPV6ADDR on device lo is missing its host route.
2026/10/15 17:56 linux-5.15.y 792fbe1537d8 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan BUG: Address IPV6ADDR on device lo is missing its host route.
2026/10/12 18:19 linux-5.15.y a051a4bf909f 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan BUG: Address IPV6ADDR on device lo is missing its host route.
2026/09/04 13:28 linux-5.15.y 0996e0926f6b f65209a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan BUG: Address IPV6ADDR on device lo is missing its host route.
* Struck through repros no longer work on HEAD.