static void dump_marks(void)
{
	static struct lock_file mark_lock;
	FILE *f;

	if (!export_marks_file)
		return;

	if (hold_lock_file_for_update(&mark_lock, export_marks_file, 0) < 0) {
		failure |= error("Unable to write marks file %s: %s",
			export_marks_file, strerror(errno));
		return;
	}

	f = fdopen_lock_file(&mark_lock, "w");
	if (!f) {
		int saved_errno = errno;
		rollback_lock_file(&mark_lock);
		failure |= error("Unable to write marks file %s: %s",
			export_marks_file, strerror(saved_errno));
		return;
	}

	dump_marks_helper(f, 0, marks);
	if (commit_lock_file(&mark_lock)) {
		failure |= error("Unable to commit marks file %s: %s",
			export_marks_file, strerror(errno));
		return;
	}
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.