static void end_packfile(void)
{
	static int running;

	if (running || !pack_data)
		return;

	running = 1;
	clear_delta_base_cache();
	if (object_count) {
		struct packed_git *new_p;
		unsigned char cur_pack_sha1[20];
		char *idx_name;
		int i;
		struct branch *b;
		struct tag *t;

		close_pack_windows(pack_data);
		sha1close(pack_file, cur_pack_sha1, 0);
		fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
				    pack_data->pack_name, object_count,
				    cur_pack_sha1, pack_size);
		close(pack_data->pack_fd);
		idx_name = keep_pack(create_index());

		/* Register the packfile with core git's machinery. */
		new_p = add_packed_git(idx_name, strlen(idx_name), 1);
		if (!new_p)
			die("core git rejected index %s", idx_name);
		all_packs[pack_id] = new_p;
		install_packed_git(new_p);

		/* Print the boundary */
		if (pack_edges) {
			fprintf(pack_edges, "%s:", new_p->pack_name);
			for (i = 0; i < branch_table_sz; i++) {
				for (b = branch_table[i]; b; b = b->table_next_branch) {
					if (b->pack_id == pack_id)
						fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
				}
			}
			for (t = first_tag; t; t = t->next_tag) {
				if (t->pack_id == pack_id)
					fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
			}
			fputc('\n', pack_edges);
			fflush(pack_edges);
		}

		pack_id++;
	}
	else {
		close(pack_data->pack_fd);
		unlink_or_warn(pack_data->pack_name);
	}
	free(pack_data);
	pack_data = NULL;
	running = 0;

	/* We can't carry a delta across packfiles. */
	strbuf_release(&last_blob.data);
	last_blob.offset = 0;
	last_blob.depth = 0;
}

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.