CIFSSMBQFSPosixInfo(const int xid, struct cifs_tcon *tcon,
		   struct kstatfs *FSData)
{
/* level 0x201  SMB_QUERY_CIFS_POSIX_INFO */
	TRANSACTION2_QFSI_REQ *pSMB = NULL;
	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
	FILE_SYSTEM_POSIX_INFO *response_data;
	int rc = 0;
	int bytes_returned = 0;
	__u16 params, byte_count;

	cFYI(1, "In QFSPosixInfo");
QFSPosixRetry:
	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	params = 2;	/* level */
	pSMB->TotalDataCount = 0;
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->MaxParameterCount = cpu_to_le16(2);
	/* BB find exact max SMB PDU from sess structure BB */
	pSMB->MaxDataCount = cpu_to_le16(100);
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	byte_count = params + 1 /* pad */ ;
	pSMB->ParameterCount = cpu_to_le16(params);
	pSMB->TotalParameterCount = pSMB->ParameterCount;
	pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
			smb_com_transaction2_qfsi_req, InformationLevel) - 4);
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_FS_INFO);
	inc_rfc1001_len(pSMB, byte_count);
	pSMB->ByteCount = cpu_to_le16(byte_count);

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, "Send error in QFSUnixInfo = %d", rc);
	} else {		/* decode response */
		rc = validate_t2((struct smb_t2_rsp *)pSMBr);

		if (rc || get_bcc(&pSMBr->hdr) < 13) {
			rc = -EIO;	/* bad smb */
		} else {
			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
			response_data =
			    (FILE_SYSTEM_POSIX_INFO
			     *) (((char *) &pSMBr->hdr.Protocol) +
				 data_offset);
			FSData->f_bsize =
					le32_to_cpu(response_data->BlockSize);
			FSData->f_blocks =
					le64_to_cpu(response_data->TotalBlocks);
			FSData->f_bfree =
			    le64_to_cpu(response_data->BlocksAvail);
			if (response_data->UserBlocksAvail == cpu_to_le64(-1)) {
				FSData->f_bavail = FSData->f_bfree;
			} else {
				FSData->f_bavail =
				    le64_to_cpu(response_data->UserBlocksAvail);
			}
			if (response_data->TotalFileNodes != cpu_to_le64(-1))
				FSData->f_files =
				     le64_to_cpu(response_data->TotalFileNodes);
			if (response_data->FreeFileNodes != cpu_to_le64(-1))
				FSData->f_ffree =
				      le64_to_cpu(response_data->FreeFileNodes);
		}
	}
	cifs_buf_release(pSMB);

	if (rc == -EAGAIN)
		goto QFSPosixRetry;

	return rc;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.