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: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.1 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=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id BC94E1F453 for ; Wed, 24 Apr 2019 19:58:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730068AbfDXT6G (ORCPT ); Wed, 24 Apr 2019 15:58:06 -0400 Received: from mail-ed1-f67.google.com ([209.85.208.67]:36085 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730018AbfDXT6G (ORCPT ); Wed, 24 Apr 2019 15:58:06 -0400 Received: by mail-ed1-f67.google.com with SMTP id u57so17081735edm.3 for ; Wed, 24 Apr 2019 12:58:05 -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=Fl6XL5n/Rg0V3uX9ruldw9vwj0sH2xIdLaQS488how4=; b=a8u5SNHhDIjxuyNs1t6kUxVzjNb3qAFD+O+sifGM+JAKcYAMhtuqlbhcnlOXYIjPMO FkMw7QOGk6Aefm4zR/0bvovVAZPeW2s08KVsg5xsZOtd2r0jWCHTM3dSCS5O1NeKqpnz au5O7v7R0VhG3kvux2hi9C6qEm7zPf1c+SjlpMlLlpeUOtLjz6wroMqoQm2EXDjkmcm0 y+Gt2zGzG68UDDXYJVU/kMUPNr6RJ3AaHM/BrHWPQpJVETWvvnlEPRM1n5iCZaPnbCmx 5OHhuAPPgIsS2Z6jdsr7hqEOyf+RI0FDsDlgB+wOUT/ZWFh2mO1/bzPPcPANSP7FBhAr pWRQ== 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=Fl6XL5n/Rg0V3uX9ruldw9vwj0sH2xIdLaQS488how4=; b=P60qz3j362zYeXqe5zorKt5PauVwgaUEQHWHcKYTXO67TXvVWg/AW+84fkyavhdrQY ijqjcgksH3xQNuRL6Sk0txNeJBftXE8l6gTcZquFEDCqDJLYM3GglTnIhcwPFybhHk3G xPEqoPpzOg2H+IsaweX33qJyEz/UENQYZRV3MW9HNIbFrMhM1eCZa+H4jxkJRxHPwlM9 a3rK2wLW9sGaVUNJIi36oRnjOZUZIc8Uq7Bj2mLePcFzCWkwOaAQvrtjvVGPNiDVom5U Yr5q0fAIijbCkJnfppUB7QxWkvus32KAM/smg4JzHzuic+g28cI6DXkrPEG6jrGk/iFs iPNg== X-Gm-Message-State: APjAAAWVpykdf9DEF4E2qbgBhxCk0e3N2x0LrpIADdmZWQFCR2TCUtT1 loo63sz0G15a+L1mwrFMxQE4w6/S X-Google-Smtp-Source: APXvYqzHmAT6gUi4n9vcoij4O/8WfIZrRr9k3STIm18Gx35SLMujU5eZZY57Th6ReL15u1XJBLFB4w== X-Received: by 2002:a50:95ed:: with SMTP id x42mr21947207eda.92.1556135884234; Wed, 24 Apr 2019 12:58:04 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id y16sm1802644ejm.22.2019.04.24.12.58.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Apr 2019 12:58:03 -0700 (PDT) Date: Wed, 24 Apr 2019 12:58:03 -0700 (PDT) X-Google-Original-Date: Wed, 24 Apr 2019 19:57:57 GMT Message-Id: <91f300ec0acd825494fa13d93cdc4770bbf2ac14.1556135881.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Derrick Stolee via GitGitGadget" Subject: [PATCH v2 1/5] commit-graph: return with errors during write Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: sandals@crustytoothpaste.net, 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 write_commit_graph() method uses die() to report failure and exit when confronted with an unexpected condition. This use of die() in a library function is incorrect and is now replaced by error() statements and an int return type. Now that we use 'goto cleanup' to jump to the terminal condition on an error, we have new paths that could lead to uninitialized values. New initializers are added to correct for this. The builtins 'commit-graph', 'gc', and 'commit' call these methods, so update them to check the return value. Signed-off-by: Derrick Stolee --- builtin/commit-graph.c | 19 +++++++------ builtin/commit.c | 5 ++-- builtin/gc.c | 7 ++--- commit-graph.c | 60 +++++++++++++++++++++++++++++------------- commit-graph.h | 10 +++---- 5 files changed, 62 insertions(+), 39 deletions(-) diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c index 537fdfd0f0..2e86251f02 100644 --- a/builtin/commit-graph.c +++ b/builtin/commit-graph.c @@ -141,6 +141,7 @@ static int graph_write(int argc, const char **argv) struct string_list *pack_indexes = NULL; struct string_list *commit_hex = NULL; struct string_list lines; + int result; static struct option builtin_commit_graph_write_options[] = { OPT_STRING(0, "object-dir", &opts.obj_dir, @@ -168,10 +169,8 @@ static int graph_write(int argc, const char **argv) read_replace_refs = 0; - if (opts.reachable) { - write_commit_graph_reachable(opts.obj_dir, opts.append, 1); - return 0; - } + if (opts.reachable) + return write_commit_graph_reachable(opts.obj_dir, opts.append, 1); string_list_init(&lines, 0); if (opts.stdin_packs || opts.stdin_commits) { @@ -188,14 +187,14 @@ static int graph_write(int argc, const char **argv) UNLEAK(buf); } - write_commit_graph(opts.obj_dir, - pack_indexes, - commit_hex, - opts.append, - 1); + result = write_commit_graph(opts.obj_dir, + pack_indexes, + commit_hex, + opts.append, + 1); UNLEAK(lines); - return 0; + return result; } int cmd_commit_graph(int argc, const char **argv, const char *prefix) diff --git a/builtin/commit.c b/builtin/commit.c index 2986553d5f..b9ea7222fa 100644 --- a/builtin/commit.c +++ b/builtin/commit.c @@ -1669,8 +1669,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix) "new_index file. Check that disk is not full and quota is\n" "not exceeded, and then \"git reset HEAD\" to recover.")); - if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0)) - write_commit_graph_reachable(get_object_directory(), 0, 0); + if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && + write_commit_graph_reachable(get_object_directory(), 0, 0)) + return 1; repo_rerere(the_repository, 0); run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); diff --git a/builtin/gc.c b/builtin/gc.c index 020f725acc..3984addf73 100644 --- a/builtin/gc.c +++ b/builtin/gc.c @@ -664,9 +664,10 @@ int cmd_gc(int argc, const char **argv, const char *prefix) clean_pack_garbage(); } - if (gc_write_commit_graph) - write_commit_graph_reachable(get_object_directory(), 0, - !quiet && !daemonized); + if (gc_write_commit_graph && + write_commit_graph_reachable(get_object_directory(), 0, + !quiet && !daemonized)) + return 1; if (auto_gc && too_many_loose_objects()) warning(_("There are too many unreachable loose objects; " diff --git a/commit-graph.c b/commit-graph.c index 66865acbd7..ee487a364b 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -851,27 +851,30 @@ static int add_ref_to_list(const char *refname, return 0; } -void write_commit_graph_reachable(const char *obj_dir, int append, - int report_progress) +int write_commit_graph_reachable(const char *obj_dir, int append, + int report_progress) { struct string_list list = STRING_LIST_INIT_DUP; + int result; for_each_ref(add_ref_to_list, &list); - write_commit_graph(obj_dir, NULL, &list, append, report_progress); + result = write_commit_graph(obj_dir, NULL, &list, + append, report_progress); string_list_clear(&list, 0); + return result; } -void write_commit_graph(const char *obj_dir, - struct string_list *pack_indexes, - struct string_list *commit_hex, - int append, int report_progress) +int write_commit_graph(const char *obj_dir, + struct string_list *pack_indexes, + struct string_list *commit_hex, + int append, int report_progress) { struct packed_oid_list oids; struct packed_commit_list commits; struct hashfile *f; uint32_t i, count_distinct = 0; - char *graph_name; + char *graph_name = NULL; struct lock_file lk = LOCK_INIT; uint32_t chunk_ids[5]; uint64_t chunk_offsets[5]; @@ -883,15 +886,17 @@ void write_commit_graph(const char *obj_dir, uint64_t progress_cnt = 0; struct strbuf progress_title = STRBUF_INIT; unsigned long approx_nr_objects; + int res = 0; if (!commit_graph_compatible(the_repository)) - return; + return 0; oids.nr = 0; approx_nr_objects = approximate_object_count(); oids.alloc = approx_nr_objects / 32; oids.progress = NULL; oids.progress_done = 0; + commits.list = NULL; if (append) { prepare_commit_graph_one(the_repository, obj_dir); @@ -932,10 +937,16 @@ void write_commit_graph(const char *obj_dir, strbuf_setlen(&packname, dirlen); strbuf_addstr(&packname, pack_indexes->items[i].string); p = add_packed_git(packname.buf, packname.len, 1); - if (!p) - die(_("error adding pack %s"), packname.buf); - if (open_pack_index(p)) - die(_("error opening index for %s"), packname.buf); + if (!p) { + error(_("error adding pack %s"), packname.buf); + res = 1; + goto cleanup; + } + if (open_pack_index(p)) { + error(_("error opening index for %s"), packname.buf); + res = 1; + goto cleanup; + } for_each_object_in_pack(p, add_packed_commits, &oids, FOR_EACH_OBJECT_PACK_ORDER); close_pack(p); @@ -1006,8 +1017,11 @@ void write_commit_graph(const char *obj_dir, } stop_progress(&progress); - if (count_distinct >= GRAPH_EDGE_LAST_MASK) - die(_("the commit graph format cannot write %d commits"), count_distinct); + if (count_distinct >= GRAPH_EDGE_LAST_MASK) { + error(_("the commit graph format cannot write %d commits"), count_distinct); + res = 1; + goto cleanup; + } commits.nr = 0; commits.alloc = count_distinct; @@ -1039,16 +1053,21 @@ void write_commit_graph(const char *obj_dir, num_chunks = num_extra_edges ? 4 : 3; stop_progress(&progress); - if (commits.nr >= GRAPH_EDGE_LAST_MASK) - die(_("too many commits to write graph")); + if (commits.nr >= GRAPH_EDGE_LAST_MASK) { + error(_("too many commits to write graph")); + res = 1; + goto cleanup; + } compute_generation_numbers(&commits, report_progress); graph_name = get_commit_graph_filename(obj_dir); if (safe_create_leading_directories(graph_name)) { UNLEAK(graph_name); - die_errno(_("unable to create leading directories of %s"), - graph_name); + error(_("unable to create leading directories of %s"), + graph_name); + res = errno; + goto cleanup; } hold_lock_file_for_update(&lk, graph_name, LOCK_DIE_ON_ERROR); @@ -1107,9 +1126,12 @@ void write_commit_graph(const char *obj_dir, finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC); commit_lock_file(&lk); +cleanup: free(graph_name); free(commits.list); free(oids.list); + + return res; } #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 diff --git a/commit-graph.h b/commit-graph.h index 7dfb8c896f..d15670bf46 100644 --- a/commit-graph.h +++ b/commit-graph.h @@ -65,12 +65,12 @@ struct commit_graph *parse_commit_graph(void *graph_map, int fd, */ int generation_numbers_enabled(struct repository *r); -void write_commit_graph_reachable(const char *obj_dir, int append, +int write_commit_graph_reachable(const char *obj_dir, int append, int report_progress); -void write_commit_graph(const char *obj_dir, - struct string_list *pack_indexes, - struct string_list *commit_hex, - int append, int report_progress); +int write_commit_graph(const char *obj_dir, + struct string_list *pack_indexes, + struct string_list *commit_hex, + int append, int report_progress); int verify_commit_graph(struct repository *r, struct commit_graph *g); -- gitgitgadget