static struct commit *get_revision_1(struct rev_info *revs)
{
	if (!revs->commits)
		return NULL;

	do {
		struct commit_list *entry = revs->commits;
		struct commit *commit = entry->item;

		revs->commits = entry->next;
		free(entry);

		if (revs->reflog_info) {
			save_parents(revs, commit);
			fake_reflog_parent(revs->reflog_info, commit);
			commit->object.flags &= ~(ADDED | SEEN | SHOWN);
		}

		/*
		 * If we haven't done the list limiting, we need to look at
		 * the parents here. We also need to do the date-based limiting
		 * that we'd otherwise have done in limit_list().
		 */
		if (!revs->limited) {
			if (revs->max_age != -1 &&
			    (commit->date < revs->max_age))
				continue;
			if (add_parents_to_list(revs, commit, &revs->commits, NULL) < 0) {
				if (!revs->ignore_missing_links)
					die("Failed to traverse parents of commit %s",
						sha1_to_hex(commit->object.sha1));
			}
		}

		switch (simplify_commit(revs, commit)) {
		case commit_ignore:
			continue;
		case commit_error:
			die("Failed to simplify parents of commit %s",
			    sha1_to_hex(commit->object.sha1));
		default:
			if (revs->track_linear)
				track_linear(revs, commit);
			return commit;
		}
	} while (revs->commits);
	return NULL;
}

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.