int CIFSSMBNotify(const int xid, struct cifs_tcon *tcon,
		  const int notify_subdirs, const __u16 netfid,
		  __u32 filter, struct file *pfile, int multishot,
		  const struct nls_table *nls_codepage)
{
	int rc = 0;
	struct smb_com_transaction_change_notify_req *pSMB = NULL;
	struct smb_com_ntransaction_change_notify_rsp *pSMBr = NULL;
	struct dir_notify_req *dnotify_req;
	int bytes_returned;

	cFYI(1, "In CIFSSMBNotify for file handle %d", (int)netfid);
	rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
		      (void **) &pSMBr);
	if (rc)
		return rc;

	pSMB->TotalParameterCount = 0 ;
	pSMB->TotalDataCount = 0;
	pSMB->MaxParameterCount = cpu_to_le32(2);
	/* BB find exact data count max from sess structure BB */
	pSMB->MaxDataCount = 0; /* same in little endian or be */
/* BB VERIFY verify which is correct for above BB */
	pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
					     MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);

	pSMB->MaxSetupCount = 4;
	pSMB->Reserved = 0;
	pSMB->ParameterOffset = 0;
	pSMB->DataCount = 0;
	pSMB->DataOffset = 0;
	pSMB->SetupCount = 4; /* single byte does not need le conversion */
	pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_NOTIFY_CHANGE);
	pSMB->ParameterCount = pSMB->TotalParameterCount;
	if (notify_subdirs)
		pSMB->WatchTree = 1; /* one byte - no le conversion needed */
	pSMB->Reserved2 = 0;
	pSMB->CompletionFilter = cpu_to_le32(filter);
	pSMB->Fid = netfid; /* file handle always le */
	pSMB->ByteCount = 0;

	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
			 (struct smb_hdr *)pSMBr, &bytes_returned,
			 CIFS_ASYNC_OP);
	if (rc) {
		cFYI(1, "Error in Notify = %d", rc);
	} else {
		/* Add file to outstanding requests */
		/* BB change to kmem cache alloc */
		dnotify_req = kmalloc(
						sizeof(struct dir_notify_req),
						 GFP_KERNEL);
		if (dnotify_req) {
			dnotify_req->Pid = pSMB->hdr.Pid;
			dnotify_req->PidHigh = pSMB->hdr.PidHigh;
			dnotify_req->Mid = pSMB->hdr.Mid;
			dnotify_req->Tid = pSMB->hdr.Tid;
			dnotify_req->Uid = pSMB->hdr.Uid;
			dnotify_req->netfid = netfid;
			dnotify_req->pfile = pfile;
			dnotify_req->filter = filter;
			dnotify_req->multishot = multishot;
			spin_lock(&GlobalMid_Lock);
			list_add_tail(&dnotify_req->lhead,
					&GlobalDnotifyReqList);
			spin_unlock(&GlobalMid_Lock);
		} else
			rc = -ENOMEM;
	}
	cifs_buf_release(pSMB);
	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.