From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.9 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI shortcircuit=no autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id A02751F42B for ; Thu, 13 Sep 2018 18:02:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728215AbeIMXNB (ORCPT ); Thu, 13 Sep 2018 19:13:01 -0400 Received: from mail-pf1-f174.google.com ([209.85.210.174]:42127 "EHLO mail-pf1-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728193AbeIMXNB (ORCPT ); Thu, 13 Sep 2018 19:13:01 -0400 Received: by mail-pf1-f174.google.com with SMTP id l9-v6so3012497pff.9 for ; Thu, 13 Sep 2018 11:02:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:message-id:in-reply-to:references:from:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=1tm27vDdr+OSR1KPv2/mxLVXxHkgJHvoYoKzG0Da0dk=; b=pPUve9i5Nd2SxcKym7pnKv58k0d9ng6+MB3+JArXHnjwh9acfKrqUNsZW5ihLlpz7M m5IUXKCSkJ40euoOfFMHBAJ5Uf9ad68u6zcrz9B8sG6+wF0wYS2w0HtjRBdz3ctCMGhp DtEsbWrQ3gdROvOMndDYixtRyDBwabzl9ZPVX8369oOnPOZMBVxrgaEmoFg0O6MhAhkF 9EpWFSO79AW9qErF289LUUoUTuXrai3eWf5ztXDl+oALqD8qxUN27GJkfp3OU47bf1Q4 e/1PFjO9jlaP2uWNwbWrZuZWo/n1PQoHNHEl3SYySz4H+UFwiKIDt/Z3Zwupt4h8+HHQ jqsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:in-reply-to:references:from :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=1tm27vDdr+OSR1KPv2/mxLVXxHkgJHvoYoKzG0Da0dk=; b=EMXUertTDluCcgdYDKPXvwdX4S8ugfDEOCUIbH7e946KDPBb3OdnuES0rR++70SCK7 RK9bthZeyAY8S6aMzkYGpA+mZ28MddZnCorNT2aV5YzSGvB9QJsveIUa3DCutSz2ywDz aLKdhpcDIf3BVVjiNpfNbSjiCZyVVtpBlk8gKEHQzQdkys0JjEMOpEGi9wLbAPFJnkNW BfAj5EL6+ImJqkR71uvWRMPXsfCzNMr9TGb0Fn9TzJ9c5q82daFNL+5ifwlxQzasTOfp mOyKZ40jsrTXMrDj2UGm3DY+wo8ddReksSvxb/B5lGOaNhgzzpO7OvoPYKsS0XxGy6qr 7xRg== X-Gm-Message-State: APzg51CnXdqsN6NUPBSQCFBLErfAYvf4ze3JLfuwa8NSOAdv/6g7tiLR F+J9hiUHp2pWGV13wKxLe0KqVg1h X-Google-Smtp-Source: ANB0VdbU6r7k9hR3OWV9JvpkoNmENo6A5Fsx4Ezvfrj22wcpDE9MSeuk3W9OsfWjqcfS2XvlLY3AvQ== X-Received: by 2002:a62:23c2:: with SMTP id q63-v6mr8526257pfj.116.1536861745945; Thu, 13 Sep 2018 11:02:25 -0700 (PDT) Received: from [127.0.0.1] ([40.112.139.85]) by smtp.gmail.com with ESMTPSA id b64-v6sm5964267pfg.66.2018.09.13.11.02.24 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 13 Sep 2018 11:02:25 -0700 (PDT) Date: Thu, 13 Sep 2018 11:02:25 -0700 (PDT) X-Google-Original-Date: Thu, 13 Sep 2018 18:02:08 GMT Message-Id: In-Reply-To: References: From: "Derrick Stolee via GitGitGadget" Subject: [PATCH v2 09/11] multi-pack-index: verify object offsets Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: avarab@gmail.com, Junio C Hamano , Derrick Stolee Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Derrick Stolee The 'git multi-pack-index verify' command must verify the object offsets stored in the multi-pack-index are correct. There are two ways the offset chunk can be incorrect: the pack-int-id and the object offset. Replace the BUG() statement with a die() statement, now that we may hit a bad pack-int-id during a 'verify' command on a corrupt multi-pack-index, and it is covered by a test. Signed-off-by: Derrick Stolee --- midx.c | 29 ++++++++++++++++++++++++++++- t/t5319-multi-pack-index.sh | 27 +++++++++++++++++++++++++++ 2 files changed, 55 insertions(+), 1 deletion(-) diff --git a/midx.c b/midx.c index 80094c02a7..47e7e6113a 100644 --- a/midx.c +++ b/midx.c @@ -197,7 +197,8 @@ int prepare_midx_pack(struct multi_pack_index *m, uint32_t pack_int_id) struct strbuf pack_name = STRBUF_INIT; if (pack_int_id >= m->num_packs) - BUG("bad pack-int-id"); + die(_("bad pack-int-id: %u (%u total packs"), + pack_int_id, m->num_packs); if (m->packs[pack_int_id]) return 0; @@ -970,5 +971,31 @@ int verify_midx_file(const char *object_dir) i, oid_to_hex(&oid1), oid_to_hex(&oid2), i + 1); } + for (i = 0; i < m->num_objects; i++) { + struct object_id oid; + struct pack_entry e; + off_t m_offset, p_offset; + + nth_midxed_object_oid(&oid, m, i); + if (!fill_midx_entry(&oid, &e, m)) { + midx_report(_("failed to load pack entry for oid[%d] = %s"), + i, oid_to_hex(&oid)); + continue; + } + + if (open_pack_index(e.p)) { + midx_report(_("failed to load pack-index for packfile %s"), + e.p->pack_name); + break; + } + + m_offset = e.offset; + p_offset = find_pack_entry_one(oid.hash, e.p); + + if (m_offset != p_offset) + midx_report(_("incorrect object offset for oid[%d] = %s: %"PRIx64" != %"PRIx64), + i, oid_to_hex(&oid), m_offset, p_offset); + } + return verify_midx_error; } diff --git a/t/t5319-multi-pack-index.sh b/t/t5319-multi-pack-index.sh index a968b9a959..828c240389 100755 --- a/t/t5319-multi-pack-index.sh +++ b/t/t5319-multi-pack-index.sh @@ -176,6 +176,7 @@ test_expect_success 'verify bad signature' ' ' HASH_LEN=20 +NUM_OBJECTS=74 MIDX_BYTE_VERSION=4 MIDX_BYTE_OID_VERSION=5 MIDX_BYTE_CHUNK_COUNT=6 @@ -192,6 +193,10 @@ MIDX_OID_FANOUT_WIDTH=4 MIDX_BYTE_OID_FANOUT_ORDER=$((MIDX_OFFSET_OID_FANOUT + 250 * $MIDX_OID_FANOUT_WIDTH + 1)) MIDX_OFFSET_OID_LOOKUP=$(($MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH)) MIDX_BYTE_OID_LOOKUP=$(($MIDX_OFFSET_OID_LOOKUP + 16 * $HASH_LEN)) +MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN)) +MIDX_OFFSET_WIDTH=8 +MIDX_BYTE_PACK_INT_ID=$(($MIDX_OFFSET_OBJECT_OFFSETS + 16 * $MIDX_OFFSET_WIDTH + 2)) +MIDX_BYTE_OFFSET=$(($MIDX_OFFSET_OBJECT_OFFSETS + 16 * $MIDX_OFFSET_WIDTH + 6)) test_expect_success 'verify bad version' ' corrupt_midx_and_verify $MIDX_BYTE_VERSION "\00" $objdir \ @@ -243,6 +248,16 @@ test_expect_success 'verify oid lookup out of order' ' "oid lookup out of order" ' +test_expect_success 'verify incorrect pack-int-id' ' + corrupt_midx_and_verify $MIDX_BYTE_PACK_INT_ID "\07" $objdir \ + "bad pack-int-id" +' + +test_expect_success 'verify incorrect offset' ' + corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\07" $objdir \ + "incorrect object offset" +' + test_expect_success 'repack removes multi-pack-index' ' test_path_is_file $objdir/pack/multi-pack-index && git repack -adf && @@ -310,4 +325,16 @@ test_expect_success 'verify multi-pack-index with 64-bit offsets' ' git multi-pack-index verify --object-dir=objects64 ' +NUM_OBJECTS=63 +MIDX_OFFSET_OID_FANOUT=$((MIDX_OFFSET_PACKNAMES + 54)) +MIDX_OFFSET_OID_LOOKUP=$((MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH)) +MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN)) +MIDX_OFFSET_LARGE_OFFSETS=$(($MIDX_OFFSET_OBJECT_OFFSETS + $NUM_OBJECTS * $MIDX_OFFSET_WIDTH)) +MIDX_BYTE_LARGE_OFFSET=$(($MIDX_OFFSET_LARGE_OFFSETS + 3)) + +test_expect_success 'verify incorrect 64-bit offset' ' + corrupt_midx_and_verify $MIDX_BYTE_LARGE_OFFSET "\07" objects64 \ + "incorrect object offset" +' + test_done -- gitgitgadget