Merge branch 'ah/plugleaks'

Plug various leans reported by LSAN.

* ah/plugleaks:
  builtin/rm: avoid leaking pathspec and seen
  builtin/rebase: release git_format_patch_opt too
  builtin/for-each-ref: free filter and UNLEAK sorting.
  mailinfo: also free strbuf lists when clearing mailinfo
  builtin/checkout: clear pending objects after diffing
  builtin/check-ignore: clear_pathspec before returning
  builtin/bugreport: don't leak prefixed filename
  branch: FREE_AND_NULL instead of NULL'ing real_ref
  bloom: clear each bloom_key after use
  ls-files: free max_prefix when done
  wt-status: fix multiple small leaks
  revision: free remainder of old commit list in limit_list

Author: gitster

bloom.c

@@ -283,6 +283,7 @@ struct bloom_filter *get_or_compute_bloom_filter(struct repository *r,
 			struct bloom_key key;
 			fill_bloom_key(e->path, strlen(e->path), &key, settings);
 			add_key_to_filter(&key, filter, settings);
+			clear_bloom_key(&key);
 		}
 
 	cleanup:

branch.c

@@ -294,7 +294,7 @@ void create_branch(struct repository *r,
 			if (explicit_tracking)
 				die(_(upstream_not_branch), start_name);
 			else
-				real_ref = NULL;
+				FREE_AND_NULL(real_ref);
 		}
 		break;
 	default:

builtin/bugreport.c

@@ -129,6 +129,7 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
 	char *option_output = NULL;
 	char *option_suffix = "%Y-%m-%d-%H%M";
 	const char *user_relative_path = NULL;
+	char *prefixed_filename;
 
 	const struct option bugreport_options[] = {
 		OPT_STRING('o', "output-directory", &option_output, N_("path"),
@@ -142,9 +143,9 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
 			     bugreport_usage, 0);
 
 	/* Prepare the path to put the result */
-	strbuf_addstr(&report_path,
-		      prefix_filename(prefix,
-				      option_output ? option_output : ""));
+	prefixed_filename = prefix_filename(prefix,
+					    option_output ? option_output : "");
+	strbuf_addstr(&report_path, prefixed_filename);
 	strbuf_complete(&report_path, '/');
 
 	strbuf_addstr(&report_path, "git-bugreport-");
@@ -189,6 +190,7 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
 	fprintf(stderr, _("Created new report at '%s'.\n"),
 		user_relative_path);
 
+	free(prefixed_filename);
 	UNLEAK(buffer);
 	UNLEAK(report_path);
 	return !!launch_editor(report_path.buf, NULL, NULL);

builtin/check-ignore.c

@@ -119,6 +119,7 @@ static int check_ignore(struct dir_struct *dir,
 			num_ignored++;
 	}
 	free(seen);
+	clear_pathspec(&pathspec);
 
 	return num_ignored;
 }

builtin/checkout.c

@@ -607,6 +607,7 @@ static void show_local_changes(struct object *head,
 	diff_setup_done(&rev.diffopt);
 	add_pending_object(&rev, head, NULL);
 	run_diff_index(&rev, 0);
+	object_array_clear(&rev.pending);
 }
 
 static void describe_detached_head(const char *msg, struct commit *commit)

builtin/for-each-ref.c

@@ -94,5 +94,8 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 	strbuf_release(&err);
 	strbuf_release(&output);
 	ref_array_clear(&array);
+	free_commit_list(filter.with_commit);
+	free_commit_list(filter.no_commit);
+	UNLEAK(sorting);
 	return 0;
 }

builtin/ls-files.c

@@ -607,7 +607,7 @@ static int option_parse_exclude_standard(const struct option *opt,
 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 {
 	int require_work_tree = 0, show_tag = 0, i;
-	const char *max_prefix;
+	char *max_prefix;
 	struct dir_struct dir;
 	struct pattern_list *pl;
 	struct string_list exclude_list = STRING_LIST_INIT_NODUP;
@@ -785,5 +785,6 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 	}
 
 	dir_clear(&dir);
+	free(max_prefix);
 	return 0;
 }

builtin/rebase.c

@@ -2109,6 +2109,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	free(options.head_name);
 	free(options.gpg_sign_opt);
 	free(options.cmd);
+	strbuf_release(&options.git_format_patch_opt);
 	free(squash_onto_name);
 	return ret;
 }

builtin/rm.c

@@ -342,6 +342,8 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
 		if (!seen_any)
 			exit(ret);
 	}
+	clear_pathspec(&pathspec);
+	free(seen);
 
 	if (!index_only)
 		submodules_absorb_gitdir_if_needed();

mailinfo.c

@@ -821,7 +821,7 @@ static int handle_commit_msg(struct mailinfo *mi, struct strbuf *line)
 		for (i = 0; header[i]; i++) {
 			if (mi->s_hdr_data[i])
 				strbuf_release(mi->s_hdr_data[i]);
-			mi->s_hdr_data[i] = NULL;
+			FREE_AND_NULL(mi->s_hdr_data[i]);
 		}
 		return 0;
 	}
@@ -1236,22 +1236,14 @@ void setup_mailinfo(struct mailinfo *mi)
 
 void clear_mailinfo(struct mailinfo *mi)
 {
-	int i;
-
 	strbuf_release(&mi->name);
 	strbuf_release(&mi->email);
 	strbuf_release(&mi->charset);
 	strbuf_release(&mi->inbody_header_accum);
 	free(mi->message_id);
 
-	if (mi->p_hdr_data)
-		for (i = 0; mi->p_hdr_data[i]; i++)
-			strbuf_release(mi->p_hdr_data[i]);
-	free(mi->p_hdr_data);
-	if (mi->s_hdr_data)
-		for (i = 0; mi->s_hdr_data[i]; i++)
-			strbuf_release(mi->s_hdr_data[i]);
-	free(mi->s_hdr_data);
+	strbuf_list_free(mi->p_hdr_data);
+	strbuf_list_free(mi->s_hdr_data);
 
 	while (mi->content < mi->content_top) {
 		free(*(mi->content_top));

revision.c

@@ -1393,20 +1393,20 @@ static int limit_list(struct rev_info *revs)
 {
 	int slop = SLOP;
 	timestamp_t date = TIME_MAX;
-	struct commit_list *list = revs->commits;
+	struct commit_list *original_list = revs->commits;
 	struct commit_list *newlist = NULL;
 	struct commit_list **p = &newlist;
 	struct commit_list *bottom = NULL;
 	struct commit *interesting_cache = NULL;
 
 	if (revs->ancestry_path) {
-		bottom = collect_bottom_commits(list);
+		bottom = collect_bottom_commits(original_list);
 		if (!bottom)
 			die("--ancestry-path given but there are no bottom commits");
 	}
 
-	while (list) {
-		struct commit *commit = pop_commit(&list);
+	while (original_list) {
+		struct commit *commit = pop_commit(&original_list);
 		struct object *obj = &commit->object;
 		show_early_output_fn_t show;
 
@@ -1415,11 +1415,11 @@ static int limit_list(struct rev_info *revs)
 
 		if (revs->max_age != -1 && (commit->date < revs->max_age))
 			obj->flags |= UNINTERESTING;
-		if (process_parents(revs, commit, &list, NULL) < 0)
+		if (process_parents(revs, commit, &original_list, NULL) < 0)
 			return -1;
 		if (obj->flags & UNINTERESTING) {
 			mark_parents_uninteresting(commit);
-			slop = still_interesting(list, date, slop, &interesting_cache);
+			slop = still_interesting(original_list, date, slop, &interesting_cache);
 			if (slop)
 				continue;
 			break;
@@ -1452,14 +1452,17 @@ static int limit_list(struct rev_info *revs)
 	 * Check if any commits have become TREESAME by some of their parents
 	 * becoming UNINTERESTING.
 	 */
-	if (limiting_can_increase_treesame(revs))
+	if (limiting_can_increase_treesame(revs)) {
+		struct commit_list *list = NULL;
 		for (list = newlist; list; list = list->next) {
 			struct commit *c = list->item;
 			if (c->object.flags & (UNINTERESTING | TREESAME))
 				continue;
 			update_treesame(revs, c);
 		}
+	}
 
+	free_commit_list(original_list);
 	revs->commits = newlist;
 	return 0;
 }

strbuf.c

@@ -209,6 +209,8 @@ void strbuf_list_free(struct strbuf **sbs)
 {
 	struct strbuf **s = sbs;
 
+	if (!s)
+		return;
 	while (*s) {
 		strbuf_release(*s);
 		free(*s++);

wt-status.c

@@ -616,6 +616,7 @@ static void wt_status_collect_changes_worktree(struct wt_status *s)
 	rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
 	copy_pathspec(&rev.prune_data, &s->pathspec);
 	run_diff_files(&rev, 0);
+	clear_pathspec(&rev.prune_data);
 }
 
 static void wt_status_collect_changes_index(struct wt_status *s)
@@ -652,6 +653,8 @@ static void wt_status_collect_changes_index(struct wt_status *s)
 	rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
 	copy_pathspec(&rev.prune_data, &s->pathspec);
 	run_diff_index(&rev, 1);
+	object_array_clear(&rev.pending);
+	clear_pathspec(&rev.prune_data);
 }
 
 static void wt_status_collect_changes_initial(struct wt_status *s)
@@ -2480,6 +2483,7 @@ int has_uncommitted_changes(struct repository *r,
 
 	diff_setup_done(&rev_info.diffopt);
 	result = run_diff_index(&rev_info, 1);
+	object_array_clear(&rev_info.pending);
 	return diff_result_code(&rev_info.diffopt, result);
 }