bundle: plug leaks in create_bundle()

When creating a bundle, we set up a revision walk, but never release
data associated with it. Furthermore, we create a mostly-shallow copy of
that revision walk where we only adapt its pending objects such that we
can reuse the walk. While that copy must not be released, the pending
objects array need to be.

Plug those memory leaks by releasing the revision walk and the pending
objects of the copied revision walk.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

bundle.c

@@ -500,6 +500,7 @@ int create_bundle(struct repository *r, const char *path,
 	struct rev_info revs, revs_copy;
 	int min_version = 2;
 	struct bundle_prerequisites_info bpi;
+	int ret;
 	int i;
 
 	/* init revs to list objects for pack-objects later */
@@ -525,8 +526,8 @@ int create_bundle(struct repository *r, const char *path,
 		min_version = 3;
 
 	if (argc > 1) {
-		error(_("unrecognized argument: %s"), argv[1]);
-		goto err;
+		ret = error(_("unrecognized argument: %s"), argv[1]);
+		goto out;
 	}
 
 	bundle_to_stdout = !strcmp(path, "-");
@@ -591,23 +592,31 @@ int create_bundle(struct repository *r, const char *path,
 
 	/* write bundle refs */
 	ref_count = write_bundle_refs(bundle_fd, &revs_copy);
-	if (!ref_count)
+	if (!ref_count) {
 		die(_("Refusing to create empty bundle."));
-	else if (ref_count < 0)
-		goto err;
+	} else if (ref_count < 0) {
+		ret = -1;
+		goto out;
+	}
 
 	/* write pack */
-	if (write_pack_data(bundle_fd, &revs_copy, pack_options))
-		goto err;
+	if (write_pack_data(bundle_fd, &revs_copy, pack_options)) {
+		ret = -1;
+		goto out;
+	}
 
 	if (!bundle_to_stdout) {
 		if (commit_lock_file(&lock))
 			die_errno(_("cannot create '%s'"), path);
 	}
-	return 0;
-err:
+
+	ret = 0;
+
+out:
+	object_array_clear(&revs_copy.pending);
+	release_revisions(&revs);
 	rollback_lock_file(&lock);
-	return -1;
+	return ret;
 }
 
 int unbundle(struct repository *r, struct bundle_header *header,

t/t5605-clone-local.sh

@@ -4,6 +4,7 @@ test_description='test local clone'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 repo_is_hardlinked() {

t/t5607-clone-bundle.sh

@@ -4,6 +4,7 @@ test_description='some bundle related tests'
 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' '

t/t6020-bundle-misc.sh

@@ -8,6 +8,7 @@ test_description='Test git-bundle'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-bundle.sh
 . "$TEST_DIRECTORY"/lib-terminal.sh