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

Status: upstream: reported on 2026/08/29 09:52
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+2aeee973408e81988d90@syzkaller.appspotmail.com
First crash: 10d, last: 9h20m
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ID Workflow Result Correct Bug Created Started Finished Revision
9fbf8f72 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ BUG: Address NUM::NUM on device lo is missing its host route. 2026/08/21 00:00 2026/08/21 00:00 2026/08/21 00:59 1e72964b
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Title Replies (including bot) Last reply
[syzbot] BUG: Address NUM::NUM on device lo is missing its host route. 0 (1) 2026/08/29 09:52
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 BUG: Address NUM::NUM on device lo is missing its host route. -1 1 23d 23d 0/2 upstream: reported on 2026/08/05 22:54

Sample crash report:
IPv6: BUG: Address 2001::1 on device lo is missing its host route.

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/29 10:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1b8fa82cab7 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
2026/08/29 09:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1b8fa82cab7 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
2026/08/27 21:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1b8fa82cab7 e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
2026/08/27 18:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1b8fa82cab7 e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
2026/08/19 01:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
2026/08/19 01:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
* Struck through repros no longer work on HEAD.