From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: * X-Spam-ASN: AS3215 2.6.0.0/16 X-Spam-Status: No, score=1.4 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,LIST_MIRROR_RECEIVED,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE shortcircuit=no autolearn=no autolearn_force=no version=3.4.2 Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by dcvr.yhbt.net (Postfix) with ESMTP id DDD9C1F670 for ; Thu, 17 Feb 2022 13:56:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241490AbiBQNzw (ORCPT ); Thu, 17 Feb 2022 08:55:52 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:42416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241395AbiBQNzo (ORCPT ); Thu, 17 Feb 2022 08:55:44 -0500 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 744BB272DA3 for ; Thu, 17 Feb 2022 05:55:30 -0800 (PST) Received: by mail-wr1-x435.google.com with SMTP id d27so9177101wrc.6 for ; Thu, 17 Feb 2022 05:55:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=7x4uCn/FbLLnXOpxQxwOKZWEYHfXkWZ+5D871Kaw7Sg=; b=ki40QNa9LV6p2wyfiyyL4eP0MlLXUnVheJrIcSEVHbKfyXssh1zCSOjx63CKwefHF6 nlMGhDCsAimQNW/rcL9gdZw305ONdnRZkyWY50R3tMxUdZgxK1+r038K8fKZyYdLl+k0 UZ1/RIJlPeicD4SkwIW9+i1/gFVeBFCTPyeyLp5AtWeIZSWApmFZ1yNL8CHuyZR4flZ3 iZqhXQNju8bJxIcv7kk3EGy2o4W41IE7MLD6iOWmo/fx4VhS+VnBn8jPj4TcFkMZ8Q6U 9uJ7fX8jLtbLVlZGS6sgxOz91P9C6GKAHezwCX4G1H8kAA5crLryflgTkqJSJ8smQMEU e0gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=7x4uCn/FbLLnXOpxQxwOKZWEYHfXkWZ+5D871Kaw7Sg=; b=h2uFYu8W7ikzWrqNZ+0CHpuFwQeq+5DTh/i+DMTNbEzwEMB9D0NoXvF1TRVIvIo7W4 fXNC4HfNibFrFqWU4W8K837mVGvEdBiO1E7lOriGdGHw4L4jSOCAlt2zNr8V5107tnWl D3jrutFjbll1iGvE6Kb5M2q7Dy/79BZS2qx+hUrjSJmiEpxYogrIsnDjY8sP0lrmbU3O eNZTQbF9q11oW/04ORZ9eWIpVB9TGETPS4OH7xlGiFeKnznbG6f0cC29MzcNPdx+QGnQ rGApzCESMYKQLLVH0nc+4Sk87rAeUP2PIF+K5qTU4l6cQ6PE6R2MrM6oG5HPk0XNyzE2 wviA== X-Gm-Message-State: AOAM53200KqbDZF6Fqy0fRx4emOp0aEixC0o6pl9iOG4kpJYfK5QrVpo Im4BITcEpukaQgfYb9EKYceZlGeZi7w= X-Google-Smtp-Source: ABdhPJxbkcEg7RBYqV90+MppIw1WLf9AjkRKFx2wvFClLFDqPPNDOBfkXtxxEN09bcFrO9TPChp1BQ== X-Received: by 2002:adf:e4c2:0:b0:1e3:3e5d:bd65 with SMTP id v2-20020adfe4c2000000b001e33e5dbd65mr2466305wrm.422.1645106128839; Thu, 17 Feb 2022 05:55:28 -0800 (PST) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id g4sm13754420wri.88.2022.02.17.05.55.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Feb 2022 05:55:28 -0800 (PST) Message-Id: <4c1a19fc4aef2742e2733b804221186aa164f721.1645106124.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Han-Wen Nienhuys via GitGitGadget" Date: Thu, 17 Feb 2022 13:55:19 +0000 Subject: [PATCH v2 2/7] reftable: reject 0 object_id_len Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: Han-Wen Nienhuys , Han-Wen Nienhuys , Han-Wen Nienhuys Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Han-Wen Nienhuys The spec says 2 <= object_id_len <= 31. We are lenient and allow 1, but we forbid 0, so we can we can be sure that we never read a 0-length key. Signed-off-by: Han-Wen Nienhuys --- reftable/reader.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/reftable/reader.c b/reftable/reader.c index 00906e7a2de..54b4025105c 100644 --- a/reftable/reader.c +++ b/reftable/reader.c @@ -155,6 +155,11 @@ static int parse_footer(struct reftable_reader *r, uint8_t *footer, r->log_offsets.is_present = (first_block_typ == BLOCK_TYPE_LOG || r->log_offsets.offset > 0); r->obj_offsets.is_present = r->obj_offsets.offset > 0; + if (r->obj_offsets.is_present && !r->object_id_len) { + err = REFTABLE_FORMAT_ERROR; + goto done; + } + err = 0; done: return err; -- gitgitgadget