CIFSSMBCopy(const int xid, struct cifs_tcon *tcon, const char *fromName,
	    const __u16 target_tid, const char *toName, const int flags,
	    const struct nls_table *nls_codepage, int remap)
{
	int rc = 0;
	COPY_REQ *pSMB = NULL;
	COPY_RSP *pSMBr = NULL;
	int bytes_returned;
	int name_len, name_len2;
	__u16 count;

	cFYI(1, "In CIFSSMBCopy");
copyRetry:
	rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB,
			(void **) &pSMBr);
	if (rc)
		return rc;

	pSMB->BufferFormat = 0x04;
	pSMB->Tid2 = target_tid;

	pSMB->Flags = cpu_to_le16(flags & COPY_TREE);

	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
		name_len = cifsConvertToUCS((__le16 *) pSMB->OldFileName,
					    fromName, PATH_MAX, nls_codepage,
					    remap);
		name_len++;     /* trailing null */
		name_len *= 2;
		pSMB->OldFileName[name_len] = 0x04;     /* pad */
		/* protocol requires ASCII signature byte on Unicode string */
		pSMB->OldFileName[name_len + 1] = 0x00;
		name_len2 =
		    cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
				toName, PATH_MAX, nls_codepage, remap);
		name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
		name_len2 *= 2; /* convert to bytes */
	} else { 	/* BB improve the check for buffer overruns BB */
		name_len = strnlen(fromName, PATH_MAX);
		name_len++;     /* trailing null */
		strncpy(pSMB->OldFileName, fromName, name_len);
		name_len2 = strnlen(toName, PATH_MAX);
		name_len2++;    /* trailing null */
		pSMB->OldFileName[name_len] = 0x04;  /* 2nd buffer format */
		strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
		name_len2++;    /* trailing null */
		name_len2++;    /* signature byte */
	}

	count = 1 /* 1st signature byte */  + name_len + name_len2;
	inc_rfc1001_len(pSMB, count);
	pSMB->ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
		(struct smb_hdr *) pSMBr, &bytes_returned, 0);
	if (rc) {
		cFYI(1, "Send error in copy = %d with %d files copied",
			rc, le16_to_cpu(pSMBr->CopyCount));
	}
	cifs_buf_release(pSMB);

	if (rc == -EAGAIN)
		goto copyRetry;

	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.