Merge branch 'ab/plug-random-leaks'

Plug random memory leaks.

* ab/plug-random-leaks:
  repository.c: free the "path cache" in repo_clear()
  range-diff: plug memory leak in read_patches()
  range-diff: plug memory leak in common invocation
  lockfile API users: simplify and don't leak "path"
  commit-graph: stop fill_oids_from_packs() progress on error and free()
  commit-graph: fix memory leak in misused string_list API
  submodule--helper: fix trivial leak in module_add()
  transport: stop needlessly copying bundle header references
  bundle: call strvec_clear() on allocated strvec
  remote-curl.c: free memory in cmd_main()
  urlmatch.c: add and use a *_release() function
  diff.c: free "buf" in diff_words_flush()
  merge-base: free() allocated "struct commit **" list
  index-pack: fix memory leaks

21 files changed, 113 insertions, 62 deletions

diff --git a/apply.c b/apply.c
index 0912307bd9..01f9181642 100644
--- a/apply.c
+++ b/apply.c
@@ -219,13 +219,18 @@ static void free_fragment_list(struct fragment *list)
 	}
 }
 
-static void free_patch(struct patch *patch)
+void release_patch(struct patch *patch)
 {
 	free_fragment_list(patch->fragments);
 	free(patch->def_name);
 	free(patch->old_name);
 	free(patch->new_name);
 	free(patch->result);
+}
+
+static void free_patch(struct patch *patch)
+{
+	release_patch(patch);
 	free(patch);
 }
 
diff --git a/apply.h b/apply.h
index 4052da50c0..b9f18ce87d 100644
--- a/apply.h
+++ b/apply.h
@@ -173,6 +173,8 @@ int parse_git_diff_header(struct strbuf *root,
 			  unsigned int size,
 			  struct patch *patch);
 
+void release_patch(struct patch *patch);
+
 /*
  * Some aspects of the apply behavior are controlled by the following
  * bits in the "options" parameter passed to apply_all_patches().
diff --git a/builtin/bundle.c b/builtin/bundle.c
index 5a85d7cd0f..2adad545a2 100644
--- a/builtin/bundle.c
+++ b/builtin/bundle.c
@@ -93,6 +93,7 @@ static int cmd_bundle_create(int argc, const char **argv, const char *prefix) {
 	if (!startup_info->have_repository)
 		die(_("Need a repository to create a bundle."));
 	ret = !!create_bundle(the_repository, bundle_file, argc, argv, &pack_opts, version);
+	strvec_clear(&pack_opts);
 	free(bundle_file);
 	return ret;
 }
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 4247fbde95..51c4040ea6 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -192,7 +192,7 @@ static int git_commit_graph_write_config(const char *var, const char *value,
 
 static int graph_write(int argc, const char **argv)
 {
-	struct string_list pack_indexes = STRING_LIST_INIT_NODUP;
+	struct string_list pack_indexes = STRING_LIST_INIT_DUP;
 	struct strbuf buf = STRBUF_INIT;
 	struct oidset commits = OIDSET_INIT;
 	struct object_directory *odb = NULL;
@@ -273,8 +273,8 @@ static int graph_write(int argc, const char **argv)
 
 	if (opts.stdin_packs) {
 		while (strbuf_getline(&buf, stdin) != EOF)
-			string_list_append(&pack_indexes,
-					   strbuf_detach(&buf, NULL));
+			string_list_append_nodup(&pack_indexes,
+						 strbuf_detach(&buf, NULL));
 	} else if (opts.stdin_commits) {
 		oidset_init(&commits, 0);
 		if (opts.progress)
diff --git a/builtin/config.c b/builtin/config.c
index 542d8d02b2..ebec61868b 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -612,7 +612,7 @@ static int get_urlmatch(const char *var, const char *url)
 
 		strbuf_release(&matched->value);
 	}
-	string_list_clear(&config.vars, 1);
+	urlmatch_config_release(&config);
 	string_list_clear(&values, 1);
 	free(config.url.url);
 
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index c45273de3b..38fb4f4e55 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -1113,6 +1113,7 @@ static void *threaded_second_pass(void *data)
 			list_add(&child->list, &work_head);
 			base_cache_used += child->size;
 			prune_base_data(NULL);
+			free_base_data(child);
 		} else {
 			/*
 			 * This child does not have its own children. It may be
@@ -1135,6 +1136,7 @@ static void *threaded_second_pass(void *data)
 
 				p = next_p;
 			}
+			FREE_AND_NULL(child);
 		}
 		work_unlock();
 	}
@@ -1428,6 +1430,7 @@ static void fix_unresolved_deltas(struct hashfile *f)
 		 * object).
 		 */
 		append_obj_to_pack(f, d->oid.hash, data, size, type);
+		free(data);
 		threaded_second_pass(NULL);
 
 		display_progress(progress, nr_resolved_deltas);
@@ -1707,6 +1710,7 @@ static void show_pack_info(int stat_only)
 			  i + 1,
 			  chain_histogram[i]);
 	}
+	free(chain_histogram);
 }
 
 int cmd_index_pack(int argc, const char **argv, const char *prefix)
@@ -1936,6 +1940,7 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 	if (do_fsck_object && fsck_finish(&fsck_options))
 		die(_("fsck error in pack objects"));
 
+	free(opts.anomaly);
 	free(objects);
 	strbuf_release(&index_name_buf);
 	strbuf_release(&rev_index_name_buf);
diff --git a/builtin/merge-base.c b/builtin/merge-base.c
index 26b84980db..a11f8c6e4b 100644
--- a/builtin/merge-base.c
+++ b/builtin/merge-base.c
@@ -138,6 +138,7 @@ int cmd_merge_base(int argc, const char **argv, const char *prefix)
 	int rev_nr = 0;
 	int show_all = 0;
 	int cmdmode = 0;
+	int ret;
 
 	struct option options[] = {
 		OPT_BOOL('a', "all", &show_all, N_("output all common ancestors")),
@@ -186,5 +187,7 @@ int cmd_merge_base(int argc, const char **argv, const char *prefix)
 	ALLOC_ARRAY(rev, argc);
 	while (argc-- > 0)
 		rev[rev_nr++] = get_commit_reference(*argv++);
-	return show_merge_base(rev, rev_nr, show_all);
+	ret = show_merge_base(rev, rev_nr, show_all);
+	free(rev);
+	return ret;
 }
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
index 5518ed47f6..7f02e4352a 100644
--- a/builtin/sparse-checkout.c
+++ b/builtin/sparse-checkout.c
@@ -329,11 +329,11 @@ static int write_patterns_and_update(struct pattern_list *pl)
 
 	fd = hold_lock_file_for_update(&lk, sparse_filename,
 				      LOCK_DIE_ON_ERROR);
+	free(sparse_filename);
 
 	result = update_working_directory(pl);
 	if (result) {
 		rollback_lock_file(&lk);
-		free(sparse_filename);
 		clear_pattern_list(pl);
 		update_working_directory(NULL);
 		return result;
@@ -349,7 +349,6 @@ static int write_patterns_and_update(struct pattern_list *pl)
 	fflush(fp);
 	commit_lock_file(&lk);
 
-	free(sparse_filename);
 	clear_pattern_list(pl);
 
 	return 0;
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index d8638434dc..2f7c58362b 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -3309,6 +3309,7 @@ static int module_add(int argc, const char **argv, const char *prefix)
 {
 	int force = 0, quiet = 0, progress = 0, dissociate = 0;
 	struct add_data add_data = ADD_DATA_INIT;
+	char *to_free = NULL;
 
 	struct option options[] = {
 		OPT_STRING('b', "branch", &add_data.branch, N_("branch"),
@@ -3360,7 +3361,8 @@ static int module_add(int argc, const char **argv, const char *prefix)
 			      "of the working tree"));
 
 		/* dereference source url relative to parent's url */
-		add_data.realrepo = resolve_relative_url(add_data.repo, NULL, 1);
+		to_free = resolve_relative_url(add_data.repo, NULL, 1);
+		add_data.realrepo = to_free;
 	} else if (is_dir_sep(add_data.repo[0]) || strchr(add_data.repo, ':')) {
 		add_data.realrepo = add_data.repo;
 	} else {
@@ -3413,6 +3415,7 @@ static int module_add(int argc, const char **argv, const char *prefix)
 	}
 	configure_added_submodule(&add_data);
 	free(add_data.sm_path);
+	free(to_free);
 
 	return 0;
 }
diff --git a/commit-graph.c b/commit-graph.c
index 265c010122..b8cde7ea27 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -1679,12 +1679,13 @@ int write_commit_graph_reachable(struct object_directory *odb,
 }
 
 static int fill_oids_from_packs(struct write_commit_graph_context *ctx,
-				struct string_list *pack_indexes)
+				const struct string_list *pack_indexes)
 {
 	uint32_t i;
 	struct strbuf progress_title = STRBUF_INIT;
 	struct strbuf packname = STRBUF_INIT;
 	int dirlen;
+	int ret = 0;
 
 	strbuf_addf(&packname, "%s/pack/", ctx->odb->path);
 	dirlen = packname.len;
@@ -1703,12 +1704,12 @@ static int fill_oids_from_packs(struct write_commit_graph_context *ctx,
 		strbuf_addstr(&packname, pack_indexes->items[i].string);
 		p = add_packed_git(packname.buf, packname.len, 1);
 		if (!p) {
-			error(_("error adding pack %s"), packname.buf);
-			return -1;
+			ret = error(_("error adding pack %s"), packname.buf);
+			goto cleanup;
 		}
 		if (open_pack_index(p)) {
-			error(_("error opening index for %s"), packname.buf);
-			return -1;
+			ret = error(_("error opening index for %s"), packname.buf);
+			goto cleanup;
 		}
 		for_each_object_in_pack(p, add_packed_commits, ctx,
 					FOR_EACH_OBJECT_PACK_ORDER);
@@ -1716,11 +1717,12 @@ static int fill_oids_from_packs(struct write_commit_graph_context *ctx,
 		free(p);
 	}
 
+cleanup:
 	stop_progress(&ctx->progress);
 	strbuf_release(&progress_title);
 	strbuf_release(&packname);
 
-	return 0;
+	return ret;
 }
 
 static int fill_oids_from_commits(struct write_commit_graph_context *ctx,
@@ -1852,6 +1854,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 
 		hold_lock_file_for_update_mode(&lk, lock_name,
 					       LOCK_DIE_ON_ERROR, 0444);
+		free(lock_name);
 
 		fd = git_mkstemp_mode(ctx->graph_name, 0444);
 		if (fd < 0) {
@@ -1976,6 +1979,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 		} else {
 			char *graph_name = get_commit_graph_filename(ctx->odb);
 			unlink(graph_name);
+			free(graph_name);
 		}
 
 		ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1] = xstrdup(hash_to_hex(file_hash));
@@ -2259,7 +2263,7 @@ out:
 }
 
 int write_commit_graph(struct object_directory *odb,
-		       struct string_list *pack_indexes,
+		       const struct string_list *const pack_indexes,
 		       struct oidset *commits,
 		       enum commit_graph_write_flags flags,
 		       const struct commit_graph_opts *opts)
diff --git a/commit-graph.h b/commit-graph.h
index 04a94e1830..2e3ac35237 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -142,7 +142,7 @@ int write_commit_graph_reachable(struct object_directory *odb,
 				 enum commit_graph_write_flags flags,
 				 const struct commit_graph_opts *opts);
 int write_commit_graph(struct object_directory *odb,
-		       struct string_list *pack_indexes,
+		       const struct string_list *pack_indexes,
 		       struct oidset *commits,
 		       enum commit_graph_write_flags flags,
 		       const struct commit_graph_opts *opts);
diff --git a/credential.c b/credential.c
index e7240f3f63..f6389a5068 100644
--- a/credential.c
+++ b/credential.c
@@ -130,6 +130,7 @@ static void credential_apply_config(struct credential *c)
 	git_config(urlmatch_config_entry, &config);
 	string_list_clear(&config.vars, 1);
 	free(normalized_url);
+	urlmatch_config_release(&config);
 	strbuf_release(&url);
 
 	c->configured = 1;
diff --git a/diff.c b/diff.c
index 2bd5e0d817..6b22946cd0 100644
--- a/diff.c
+++ b/diff.c
@@ -2150,6 +2150,7 @@ static void diff_words_flush(struct emit_callback *ecbdata)
 
 		for (i = 0; i < wol->nr; i++)
 			free((void *)wol->buf[i].line);
+		free(wol->buf);
 
 		wol->nr = 0;
 	}
diff --git a/path.h b/path.h
index b68691a86b..0a59c85a62 100644
--- a/path.h
+++ b/path.h
@@ -169,20 +169,6 @@ void report_linked_checkout_garbage(void);
 		return r->cached_paths.var; \
 	}
 
-struct path_cache {
-	const char *squash_msg;
-	const char *merge_msg;
-	const char *merge_rr;
-	const char *merge_mode;
-	const char *merge_head;
-	const char *merge_autostash;
-	const char *auto_merge;
-	const char *fetch_head;
-	const char *shallow;
-};
-
-#define PATH_CACHE_INIT { 0 }
-
 const char *git_path_squash_msg(struct repository *r);
 const char *git_path_merge_msg(struct repository *r);
 const char *git_path_merge_rr(struct repository *r);
diff --git a/range-diff.c b/range-diff.c
index 30a4de5c2d..b72eb9fdbe 100644
--- a/range-diff.c
+++ b/range-diff.c
@@ -40,6 +40,7 @@ static int read_patches(const char *range, struct string_list *list,
 	char *line, *current_filename = NULL;
 	ssize_t len;
 	size_t size;
+	int ret = -1;
 
 	strvec_pushl(&cp.args, "log", "--no-color", "-p", "--no-merges",
 		     "--reverse", "--date-order", "--decorate=no",
@@ -68,10 +69,10 @@ static int read_patches(const char *range, struct string_list *list,
 	if (strbuf_read(&contents, cp.out, 0) < 0) {
 		error_errno(_("could not read `log` output"));
 		finish_command(&cp);
-		return -1;
+		goto cleanup;
 	}
 	if (finish_command(&cp))
-		return -1;
+		goto cleanup;
 
 	line = contents.buf;
 	size = contents.len;
@@ -95,12 +96,9 @@ static int read_patches(const char *range, struct string_list *list,
 			CALLOC_ARRAY(util, 1);
 			if (get_oid(p, &util->oid)) {
 				error(_("could not parse commit '%s'"), p);
-				free(util);
-				free(current_filename);
+				FREE_AND_NULL(util);
 				string_list_clear(list, 1);
-				strbuf_release(&buf);
-				strbuf_release(&contents);
-				return -1;
+				goto cleanup;
 			}
 			util->matching = -1;
 			in_header = 1;
@@ -111,11 +109,8 @@ static int read_patches(const char *range, struct string_list *list,
 			error(_("could not parse first line of `log` output: "
 				"did not start with 'commit ': '%s'"),
 			      line);
-			free(current_filename);
 			string_list_clear(list, 1);
-			strbuf_release(&buf);
-			strbuf_release(&contents);
-			return -1;
+			goto cleanup;
 		}
 
 		if (starts_with(line, "diff --git")) {
@@ -136,12 +131,9 @@ static int read_patches(const char *range, struct string_list *list,
 			if (len < 0) {
 				error(_("could not parse git header '%.*s'"),
 				      orig_len, line);
-				free(util);
-				free(current_filename);
+				FREE_AND_NULL(util);
 				string_list_clear(list, 1);
-				strbuf_release(&buf);
-				strbuf_release(&contents);
-				return -1;
+				goto cleanup;
 			}
 			strbuf_addstr(&buf, " ## ");
 			if (patch.is_new > 0)
@@ -165,6 +157,7 @@ static int read_patches(const char *range, struct string_list *list,
 					    patch.old_mode, patch.new_mode);
 
 			strbuf_addstr(&buf, " ##");
+			release_patch(&patch);
 		} else if (in_header) {
 			if (starts_with(line, "Author: ")) {
 				strbuf_addstr(&buf, " ## Metadata ##\n");
@@ -218,6 +211,9 @@ static int read_patches(const char *range, struct string_list *list,
 		strbuf_addch(&buf, '\n');
 		util->diffsize++;
 	}
+
+	ret = 0;
+cleanup:
 	strbuf_release(&contents);
 
 	if (util)
@@ -225,7 +221,7 @@ static int read_patches(const char *range, struct string_list *list,
 	strbuf_release(&buf);
 	free(current_filename);
 
-	return 0;
+	return ret;
 }
 
 static int patch_util_cmp(const void *dummy, const struct patch_util *a,
diff --git a/remote-curl.c b/remote-curl.c
index 0dabef2dd7..ff44f41011 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -1472,11 +1472,12 @@ int cmd_main(int argc, const char **argv)
 {
 	struct strbuf buf = STRBUF_INIT;
 	int nongit;
+	int ret = 1;
 
 	setup_git_directory_gently(&nongit);
 	if (argc < 2) {
 		error(_("remote-curl: usage: git remote-curl <remote> [<url>]"));
-		return 1;
+		goto cleanup;
 	}
 
 	options.verbosity = 1;
@@ -1508,7 +1509,7 @@ int cmd_main(int argc, const char **argv)
 		if (strbuf_getline_lf(&buf, stdin) == EOF) {
 			if (ferror(stdin))
 				error(_("remote-curl: error reading command stream from git"));
-			return 1;
+			goto cleanup;
 		}
 		if (buf.len == 0)
 			break;
@@ -1556,12 +1557,15 @@ int cmd_main(int argc, const char **argv)
 				break;
 		} else {
 			error(_("remote-curl: unknown command '%s' from git"), buf.buf);
-			return 1;
+			goto cleanup;
 		}
 		strbuf_reset(&buf);
 	} while (1);
 
 	http_cleanup();
+	ret = 0;
+cleanup:
+	strbuf_release(&buf);
 
-	return 0;
+	return ret;
 }
diff --git a/repository.c b/repository.c
index dddee32258..5d166b692c 100644
--- a/repository.c
+++ b/repository.c
@@ -240,6 +240,20 @@ out:
 	return ret;
 }
 
+static void repo_clear_path_cache(struct repo_path_cache *cache)
+{
+	FREE_AND_NULL(cache->squash_msg);
+	FREE_AND_NULL(cache->squash_msg);
+	FREE_AND_NULL(cache->merge_msg);
+	FREE_AND_NULL(cache->merge_rr);
+	FREE_AND_NULL(cache->merge_mode);
+	FREE_AND_NULL(cache->merge_head);
+	FREE_AND_NULL(cache->merge_autostash);
+	FREE_AND_NULL(cache->auto_merge);
+	FREE_AND_NULL(cache->fetch_head);
+	FREE_AND_NULL(cache->shallow);
+}
+
 void repo_clear(struct repository *repo)
 {
 	FREE_AND_NULL(repo->gitdir);
@@ -280,6 +294,8 @@ void repo_clear(struct repository *repo)
 		remote_state_clear(repo->remote_state);
 		FREE_AND_NULL(repo->remote_state);
 	}
+
+	repo_clear_path_cache(&repo->cached_paths);
 }
 
 int repo_read_index(struct repository *repo)
diff --git a/repository.h b/repository.h
index ca837cb9e9..e29f361703 100644
--- a/repository.h
+++ b/repository.h
@@ -44,6 +44,18 @@ struct repo_settings {
 	int core_multi_pack_index;
 };
 
+struct repo_path_cache {
+	char *squash_msg;
+	char *merge_msg;
+	char *merge_rr;
+	char *merge_mode;
+	char *merge_head;
+	char *merge_autostash;
+	char *auto_merge;
+	char *fetch_head;
+	char *shallow;
+};
+
 struct repository {
 	/* Environment */
 	/*
@@ -82,7 +94,7 @@ struct repository {
 	/*
 	 * Contains path to often used file names.
 	 */
-	struct path_cache cached_paths;
+	struct repo_path_cache cached_paths;
 
 	/*
 	 * Path to the repository's graft file.
diff --git a/transport.c b/transport.c
index 253d6671b1..70e9840a90 100644
--- a/transport.c
+++ b/transport.c
@@ -125,16 +125,9 @@ struct bundle_transport_data {
 	unsigned get_refs_from_bundle_called : 1;
 };
 
-static struct ref *get_refs_from_bundle(struct transport *transport,
-					int for_push,
-					struct transport_ls_refs_options *transport_options)
+static void get_refs_from_bundle_inner(struct transport *transport)
 {
 	struct bundle_transport_data *data = transport->data;
-	struct ref *result = NULL;
-	int i;
-
-	if (for_push)
-		return NULL;
 
 	data->get_refs_from_bundle_called = 1;
 
@@ -145,6 +138,20 @@ static struct ref *get_refs_from_bundle(struct transport *transport,
 		die(_("could not read bundle '%s'"), transport->url);
 
 	transport->hash_algo = data->header.hash_algo;
+}
+
+static struct ref *get_refs_from_bundle(struct transport *transport,
+					int for_push,
+					struct transport_ls_refs_options *transport_options)
+{
+	struct bundle_transport_data *data = transport->data;
+	struct ref *result = NULL;
+	int i;
+
+	if (for_push)
+		return NULL;
+
+	get_refs_from_bundle_inner(transport);
 
 	for (i = 0; i < data->header.references.nr; i++) {
 		struct string_list_item *e = data->header.references.items + i;
@@ -169,7 +176,7 @@ static int fetch_refs_from_bundle(struct transport *transport,
 		strvec_push(&extra_index_pack_args, "-v");
 
 	if (!data->get_refs_from_bundle_called)
-		get_refs_from_bundle(transport, 0, NULL);
+		get_refs_from_bundle_inner(transport);
 	ret = unbundle(the_repository, &data->header, data->fd,
 		       &extra_index_pack_args);
 	transport->hash_algo = data->header.hash_algo;
diff --git a/urlmatch.c b/urlmatch.c
index 03ad3f30a9..b615adc923 100644
--- a/urlmatch.c
+++ b/urlmatch.c
@@ -611,3 +611,8 @@ int urlmatch_config_entry(const char *var, const char *value, void *cb)
 	strbuf_release(&synthkey);
 	return retval;
 }
+
+void urlmatch_config_release(struct urlmatch_config *config)
+{
+	string_list_clear(&config->vars, 1);
+}
diff --git a/urlmatch.h b/urlmatch.h
index 34a3ba6d19..9f40b00bfb 100644
--- a/urlmatch.h
+++ b/urlmatch.h
@@ -71,5 +71,6 @@ struct urlmatch_config {
 }
 
 int urlmatch_config_entry(const char *var, const char *value, void *cb);
+void urlmatch_config_release(struct urlmatch_config *config);
 
 #endif /* URL_MATCH_H */