CIFSSMBUnixQPathInfo(const int xid, struct cifs_tcon *tcon,
		     const unsigned char *searchName,
		     FILE_UNIX_BASIC_INFO *pFindData,
		     const struct nls_table *nls_codepage, int remap)
{
/* SMB_QUERY_FILE_UNIX_BASIC */
	TRANSACTION2_QPI_REQ *pSMB = NULL;
	TRANSACTION2_QPI_RSP *pSMBr = NULL;
	int rc = 0;
	int bytes_returned = 0;
	int name_len;
	__u16 params, byte_count;

	cFYI(1, "In QPathInfo (Unix) the path %s", searchName);
UnixQPathInfoRetry:
	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
		name_len =
		    cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
				  PATH_MAX, nls_codepage, remap);
		name_len++;	/* trailing null */
		name_len *= 2;
	} else {	/* BB improve the check for buffer overruns BB */
		name_len = strnlen(searchName, PATH_MAX);
		name_len++;	/* trailing null */
		strncpy(pSMB->FileName, searchName, name_len);
	}

	params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
	pSMB->TotalDataCount = 0;
	pSMB->MaxParameterCount = cpu_to_le16(2);
	/* BB find exact max SMB PDU from sess structure BB */
	pSMB->MaxDataCount = cpu_to_le16(4000);
	pSMB->MaxSetupCount = 0;
	pSMB->Reserved = 0;
	pSMB->Flags = 0;
	pSMB->Timeout = 0;
	pSMB->Reserved2 = 0;
	pSMB->ParameterOffset = cpu_to_le16(offsetof(
	struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->SetupCount = 1;
	pSMB->Reserved3 = 0;
	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
	byte_count = params + 1 /* pad */ ;
	pSMB->TotalParameterCount = cpu_to_le16(params);
	pSMB->ParameterCount = pSMB->TotalParameterCount;
	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
	pSMB->Reserved4 = 0;
	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 QPathInfo = %d", rc);
	} else {		/* decode response */
		rc = validate_t2((struct smb_t2_rsp *)pSMBr);

		if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) {
			cERROR(1, "Malformed FILE_UNIX_BASIC_INFO response.\n"
				   "Unix Extensions can be disabled on mount "
				   "by specifying the nosfu mount option.");
			rc = -EIO;	/* bad smb */
		} else {
			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
			memcpy((char *) pFindData,
			       (char *) &pSMBr->hdr.Protocol +
			       data_offset,
			       sizeof(FILE_UNIX_BASIC_INFO));
		}
	}
	cifs_buf_release(pSMB);
	if (rc == -EAGAIN)
		goto UnixQPathInfoRetry;

	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.