From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) (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 A09C04E3248 for ; Mon, 28 Sep 2026 15:18:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790608701; cv=none; b=jrdHx1qPpwQSRT5PqPgBURc6XadrvCgjMc9OWUMaIcUHOCilyjKIaE8AIcSqhScWB8ynDjcC9IRjq3ptlVPvOHob41Svyq9XNOEJDCjQpCXwjRLbP9/RYx40Or9NbnkeuXN/n8TyExM46NbzZWD9nQxc1/97do7v/5o1OuwcQAw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790608701; c=relaxed/simple; bh=rqlDGZjLk8Qyrw3Z2onuAtlU1Cpp+kTv3xLzbDSSXbM=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=OCJi/dYT/Psg2nv9p05ogh6eMZrud/hMxT9aP7/zEMD6n4IzgaCLDbJu/1u87PPEotfXKKzKKjBvdB8qPk/YN6mADJzD0hIH3V19ymeSnPY6z38bekPIlixYbdlkJ7fGEfWK/jtfY6O65ehSD6t+htMj+oCPpJQCB+sbP5fiRKo= 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=209.85.167.200 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-f200.google.com with SMTP id 5614622812f47-4eb0b989f0eso1308053b6e.0 for ; Mon, 28 Sep 2026 08:18:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790608698; x=1791213498; 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=HkA3bZ+2BTJK6zEplSDvNbDqSMlJUl580sgpU5PhQ4Y=; b=0L0mEtq7j58s/k0v1Ti0tm+WjNhPl2GydxZU/0axRzQvIgvRI2HeMr56Q8T9cTFtP3 fT9nVVQAL/7WECHRSpZ3BvdZpghzSeeDb/ozt3wNIu5IvWIxbdDigcdq17pcdiFMs6JE gGuAPwPOvEpyHEkV7kGxthrQeJ6EvQ+rPfxPZZfm0N4O+B/KIvYNoSwLIh1SoaL4QIkt RSiXLBOeUcwUSsGWVBcsvsGigfmu5G14s28nnqsyAeAFhXCCzhUjeAF7tf7/aPY7rWWv Fr+N+ZJB21/JleWtZHt/NXrNIpjV/En22G8wn0iE0PdbUJBY4gIt/3bVZyNTgCn80TPg GdaA== X-Gm-Message-State: AFuF++kEXesMiyTE2J12I7TaCuzntb9Rz5UXzu0H3UpMymcHSqJE87dw Y3PfUhRzsiA+RM7YTL/EW5m6ekrHN7NE+TJ8N9zZoTrRiDtDbtq9AQ8CkR98v/1/TmNXEwo9Fn+ uKl6HVU6v7m+C3mmGX0SSbMurmA7NSoGX69M0B5UePPo992beaFz6R9sEMD4= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1797:b0:4c7:26ee:3378 with SMTP id 5614622812f47-4d72c740713mr10440109b6e.30.1790608698631; Mon, 28 Sep 2026 08:18:18 -0700 (PDT) Date: Mon, 28 Sep 2026 08:18:18 -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: <6aba853a.80e1c6cc.1e8e5f.0073.GAE@google.com> Subject: Forwarded: test From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: test Author: idosch@nvidia.com #syz test diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index c90ee6dd7446..e1e672ada7e7 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3908,9 +3908,12 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister) } /* combine the user config with event to determine if permanent - * addresses are to be removed from address hash table + * addresses are to be removed from address hash table. IPv6 cannot + * operate below IPV6_MIN_MTU, so treat that like disable_ipv6 and do + * not keep addresses without their host routes. */ - if (!unregister && !idev->cnf.disable_ipv6) { + if (!unregister && !idev->cnf.disable_ipv6 && + dev->mtu >= IPV6_MIN_MTU) { /* aggregate the system setting and interface setting */ int _keep_addr = READ_ONCE(net->ipv6.devconf_all->keep_addr_on_down);