builtin/remote: fix various trivial memory leaks

There are multiple trivial memory leaks in git-remote(1). Fix those.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/remote.c

@@ -555,13 +555,16 @@ static int add_branch_for_removal(const char *refname,
 	refspec.dst = (char *)refname;
 	if (remote_find_tracking(branches->remote, &refspec))
 		return 0;
+	free(refspec.src);
 
 	/* don't delete a branch if another remote also uses it */
 	for (kr = branches->keep->list; kr; kr = kr->next) {
 		memset(&refspec, 0, sizeof(refspec));
 		refspec.dst = (char *)refname;
-		if (!remote_find_tracking(kr->remote, &refspec))
+		if (!remote_find_tracking(kr->remote, &refspec)) {
+			free(refspec.src);
 			return 0;
+		}
 	}
 
 	/* don't delete non-remote-tracking refs */
@@ -668,7 +671,11 @@ static int config_read_push_default(const char *key, const char *value,
 static void handle_push_default(const char* old_name, const char* new_name)
 {
 	struct push_default_info push_default = {
-		old_name, CONFIG_SCOPE_UNKNOWN, STRBUF_INIT, -1 };
+		.old_name = old_name,
+		.scope = CONFIG_SCOPE_UNKNOWN,
+		.origin = STRBUF_INIT,
+		.linenr = -1,
+	};
 	git_config(config_read_push_default, &push_default);
 	if (push_default.scope >= CONFIG_SCOPE_COMMAND)
 		; /* pass */
@@ -688,6 +695,8 @@ static void handle_push_default(const char* old_name, const char* new_name)
 			push_default.origin.buf, push_default.linenr,
 			old_name);
 	}
+
+	strbuf_release(&push_default.origin);
 }
 
 
@@ -785,7 +794,7 @@ static int mv(int argc, const char **argv, const char *prefix)
 	}
 
 	if (!refspec_updated)
-		return 0;
+		goto out;
 
 	/*
 	 * First remove symrefs, then rename the rest, finally create
@@ -851,10 +860,15 @@ static int mv(int argc, const char **argv, const char *prefix)
 		display_progress(progress, ++refs_renamed_nr);
 	}
 	stop_progress(&progress);
-	string_list_clear(&remote_branches, 1);
 
 	handle_push_default(rename.old_name, rename.new_name);
 
+out:
+	string_list_clear(&remote_branches, 1);
+	strbuf_release(&old_remote_context);
+	strbuf_release(&buf);
+	strbuf_release(&buf2);
+	strbuf_release(&buf3);
 	return 0;
 }
 
@@ -945,12 +959,21 @@ static int rm(int argc, const char **argv, const char *prefix)
 
 	if (!result) {
 		strbuf_addf(&buf, "remote.%s", remote->name);
-		if (git_config_rename_section(buf.buf, NULL) < 1)
+		if (git_config_rename_section(buf.buf, NULL) < 1) {
-			return error(_("Could not remove config section '%s'"), buf.buf);
+			result = error(_("Could not remove config section '%s'"), buf.buf);
+			goto out;
+		}
 
 		handle_push_default(remote->name, NULL);
 	}
 
+out:
+	for (struct known_remote *r = known_remotes.list; r;) {
+		struct known_remote *next = r->next;
+		free(r);
+		r = next;
+	}
+	strbuf_release(&buf);
 	return result;
 }
 
@@ -983,8 +1006,10 @@ static int append_ref_to_tracked_list(const char *refname,
 
 	memset(&refspec, 0, sizeof(refspec));
 	refspec.dst = (char *)refname;
-	if (!remote_find_tracking(states->remote, &refspec))
+	if (!remote_find_tracking(states->remote, &refspec)) {
 		string_list_append(&states->tracked, abbrev_branch(refspec.src));
+		free(refspec.src);
+	}
 
 	return 0;
 }

t/t5512-ls-remote.sh

@@ -5,6 +5,7 @@ test_description='git ls-remote'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 generate_references () {

t/t5514-fetch-multiple.sh

@@ -5,6 +5,7 @@ test_description='fetch --all works correctly'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 setup_repository () {

t/t5520-pull.sh

@@ -5,6 +5,7 @@ test_description='pulling into void'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 modify () {

t/t5528-push-default.sh

@@ -4,6 +4,7 @@ test_description='check various push.default settings'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup bare remotes' '

t/t5543-atomic-push.sh

@@ -5,6 +5,7 @@ test_description='pushing to a repository using the atomic push option'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 mk_repo_pair () {

t/t5570-git-daemon.sh

@@ -4,6 +4,7 @@ test_description='test fetching over git protocol'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 . "$TEST_DIRECTORY"/lib-git-daemon.sh