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=-4.2 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 1E3DA1F453 for ; Wed, 1 May 2019 13:11:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726451AbfEANLS (ORCPT ); Wed, 1 May 2019 09:11:18 -0400 Received: from mail-ed1-f65.google.com ([209.85.208.65]:45933 "EHLO mail-ed1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726379AbfEANLR (ORCPT ); Wed, 1 May 2019 09:11:17 -0400 Received: by mail-ed1-f65.google.com with SMTP id g57so8329483edc.12 for ; Wed, 01 May 2019 06:11:16 -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=QCyga8z93P50s1IC8s7yuXdhrq3QANbuJOJS7oeLcF7uUAZjM7RdIIAUTtwQQMDG/0 pzLGpe/KHQZairlXQLaCXA0bjB40X0cF4QN3gxwvMWx/JcIU38iAldf/5bGNSEaLkdil 9Hh5VdMouBoVPTjslsdNRNHXjGYesXo7pSXboHZb7MVeFnGNnNLUALRyL+aAqjgCEzVR ib1RHNcjCTew3dcNoxjzFaCmRYwuuH+gG23sgc115OqAjiMDIwxCsArCXNnIqik2xMBn ouE2V1BioTMN7NzSWFDYpGG5Z7adlb2OHBYd0u2QlKLUpurNGr4QzoeMxfhCu+YdfHMy MYVQ== 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=Ah8gYui/x2N9XVQwvihq1yNuigyrazgjB5KwMVpVlooBtqPwtl6+O1u4HY+bfBhtUv pKcbuFQWvmrhknpqBXy9lSz7BP7vASkfG1UH0awTexhGmKfIo8ByPWpOyYdVcf7kYFKv 2dR8Jx5REAVWg0gmeqWEsNqkLPc2qJHxbGm36YNRH0oqVLEi390j/lR4w/m254iv7FE7 lzxvNu89EGDSl922v4VBGzLW9GJO9ZZCKj8FYPKa1+R71XxsDWmWSqLgo+Rrx9f4Y3vm 5/x+rchEVBLKoh1vmEIe8GqUft54AIjc1bH+eDvcSXGNgKvtXyD9DYAcYdainAFRCFos fuEQ== X-Gm-Message-State: APjAAAWvflYLvfUAKHLmP2TZbC/XMcn8nRwhuQtWtaIq6d6zjAfqpWBj LHOxvjwFq/AF50Tn9IQn2rQoB5Dv X-Google-Smtp-Source: APXvYqwaZe94QdROE5cDX9qE6R4/PesoFyPS5jiBYaB4HTE3i8Bn0dZ9NiXP8VRAfeWOrqYRSqTENQ== X-Received: by 2002:a17:906:6dc1:: with SMTP id j1mr3837370ejt.90.1556716275297; Wed, 01 May 2019 06:11:15 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id i9sm11113598edk.56.2019.05.01.06.11.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 May 2019 06:11:14 -0700 (PDT) Date: Wed, 01 May 2019 06:11:14 -0700 (PDT) X-Google-Original-Date: Wed, 01 May 2019 13:11:07 GMT Message-Id: <91f300ec0acd825494fa13d93cdc4770bbf2ac14.1556716272.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Derrick Stolee via GitGitGadget" Subject: [PATCH v3 1/6] 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