static int nfs_lookup_req(struct nfs_priv *npriv, struct nfs_fh *fh,
			  const char *filename, struct inode *inode)
{
	struct nfs_inode *ninode = nfsi(inode);
	uint32_t data[1024];
	uint32_t *p;
	int len;
	struct packet *nfs_packet;

	/*
	 * struct LOOKUP3args {
	 * 	diropargs3 what;
	 * };
	 *
	 * struct LOOKUP3resok {
	 * 	nfs_fh3 object;
	 * 	post_op_attr obj_attributes;
	 * 	post_op_attr dir_attributes;
	 * };
	 *
	 * struct LOOKUP3resfail {
	 * 	post_op_attr dir_attributes;
	 * };
	 *
	 * union LOOKUP3res switch (nfsstat3 status) {
	 * case NFS3_OK:
	 * 	LOOKUP3resok resok;
	 * default:
	 * 	LOOKUP3resfail resfail;
	 * };
	 */

	p = &(data[0]);
	p = rpc_add_credentials(p);

	/* what.dir */
	p = nfs_add_fh3(p, fh);

	/* what.name */
	p = nfs_add_filename(p, strlen(filename), filename);

	len = p - &(data[0]);

	nfs_packet = rpc_req(npriv, PROG_NFS, NFSPROC3_LOOKUP, data, len);
	if (IS_ERR(nfs_packet))
		return PTR_ERR(nfs_packet);

	p = (void *)nfs_packet->data + sizeof(struct rpc_reply) + 4;

	ninode->fh.size = ntoh32(net_read_uint32(p++));
	if (ninode->fh.size > NFS3_FHSIZE) {
		debug("%s: file handle too big: %u\n", __func__,
		      ninode->fh.size);
		return -EIO;
	}
	memcpy(ninode->fh.data, p, ninode->fh.size);
	p += DIV_ROUND_UP(ninode->fh.size, 4);

	nfs_read_post_op_attr(p, inode);

	free(nfs_packet);

	return 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.