From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75CFE2D0292 for ; Sat, 22 Aug 2026 05:11:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787375472; cv=none; b=XrOp7LEXlbwL/Cu0TrO2oZyfLVA8SsPjp5FllDKdAsedMwZKaI6T/geXWjxjm77Drzx504u9M0hPpuWHzHWZJBK8H2SLBiXz53mQ1SCNrL665YpPN/JaEcx008kQ8KTdVL5m+7QVDm7FviDtlJqJlg+9e4gddtxogJg20UP6WCY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787375472; c=relaxed/simple; bh=3Ntuzbn/y1ccb86Z4zXNH1tckVTp4+rI3/AMLFyr1zw=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=Ey7gluEmnUc+hfH2H5Kb5PoiBUXLzBvLvAK1zfwUI9HHjWpVicXs3Sa7b55pLK9//4HIGWMZwRHLH54Ky8SzPJM7+3WXzxp+Wbb/u+/sLvvMQmmMorWD8Ah0k2JlkaSLxLQkJj+1W3JVbp+bBE/MH+46A99wvlt9++ikuLpsNq8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f207.google.com with SMTP id 5614622812f47-4a41f46d629so3197238b6e.3 for ; Fri, 21 Aug 2026 22:11:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787375470; x=1787980270; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=cQUzZAXwNpPzaN2MjCWlzFEowQ2KNsU0O2e+ffdjdy8=; b=GXcjfsXwop0cFYsbd0ADCSw6ZEplS59qmzMjN3XBUaWGVx9ohhH8Nn3gFWYYPQEl83 Mg1rviH98hduRut31CJKbqkO9jCGc2ANYScRUxsoAHnXmF3iSv11OobLy7GkxTbf8ttO ONbSGsxeNCxrZB1hJd6qQ9wT6lwaAxUYrPCMZrukjZu5QNy6zD7TKwZ1mEe7T7nRF1qb HkQ7qmB5v+oI+/yYrChLphiPkWxQXZHORWepsIyC+fycP03lW+ov3fGgamiBJJkfGFLt uuqwUJSRm0xZhs6hAQHvcrtg6rfDNGpgxC4GHXh9ZvnbUEWEMwcSG+URytmgNaahtuO3 M0HQ== X-Forwarded-Encrypted: i=1; AHgh+RoKvyc25Y2W79Iv063NwkuRfIo2DOaB5DqdPPDhQMRBbDzCb6hoAcuuzIB9g4uZG/+1Pzz2+YzLiDa5jt0=@vger.kernel.org X-Gm-Message-State: AFuF++mni5zh+sXdKgx6IocT4uR0iYEeq1iBzsabuz4Q8j2/ZSu+/4C9 mvJoEc5RslGAC9jbGY9ELAAkgVIe5J8StL3T0IaXBRRokHqpCSp0w48gAWtF7fIV7HdI/mOoDdN t1Wcw64sdIOXZcnpRrpkDOCFXGgf8DfvliNfHsI20TnCLcdjBr0WGl7ILf7U= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2f07:b0:4a4:c623:4c0b with SMTP id 5614622812f47-4b2ef1753c6mr14026654b6e.4.1787375470318; Fri, 21 Aug 2026 22:11:10 -0700 (PDT) Date: Fri, 21 Aug 2026 22:11:10 -0700 In-Reply-To: <6a75d605.01d0871a.3a0d52.0047.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a892f6e.ae6ddae5.3da009.0050.GAE@google.com> Subject: Re: [syzbot] BUG: Address fc00:: on device lo is missing its host route. From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, idosch@nvidia.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, pimyn@google.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 21d6ac051080 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=11bd5e79580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3 dashboard link: https://syzkaller.appspot.com/bug?extid=ded267b328e950a7c0c4 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10d52179580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11c94415580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/88380e2ddcb9/disk-21d6ac05.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5dba5c2896b7/vmlinux-21d6ac05.xz kernel image: https://storage.googleapis.com/syzbot-assets/52ac739e37e0/Image-21d6ac05.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ded267b328e950a7c0c4@syzkaller.appspotmail.com wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: BUG: Address fc00:: on device lo is missing its host route. --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.