CIFSSMBLock(const int xid, struct cifs_tcon *tcon,
	    const __u16 smb_file_id, const __u64 len,
	    const __u64 offset, const __u32 numUnlock,
	    const __u32 numLock, const __u8 lockType,
	    const bool waitFlag, const __u8 oplock_level)
{
	int rc = 0;
	LOCK_REQ *pSMB = NULL;
/*	LOCK_RSP *pSMBr = NULL; */ /* No response data other than rc to parse */
	int bytes_returned;
	int timeout = 0;
	__u16 count;

	cFYI(1, "CIFSSMBLock timeout %d numLock %d", (int)waitFlag, numLock);
	rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);

	if (rc)
		return rc;

	if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) {
		timeout = CIFS_ASYNC_OP; /* no response expected */
		pSMB->Timeout = 0;
	} else if (waitFlag) {
		timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
		pSMB->Timeout = cpu_to_le32(-1);/* blocking - do not time out */
	} else {
		pSMB->Timeout = 0;
	}

	pSMB->NumberOfLocks = cpu_to_le16(numLock);
	pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
	pSMB->LockType = lockType;
	pSMB->OplockLevel = oplock_level;
	pSMB->AndXCommand = 0xFF;	/* none */
	pSMB->Fid = smb_file_id; /* netfid stays le */

	if ((numLock != 0) || (numUnlock != 0)) {
		pSMB->Locks[0].Pid = cpu_to_le16(current->tgid);
		/* BB where to store pid high? */
		pSMB->Locks[0].LengthLow = cpu_to_le32((u32)len);
		pSMB->Locks[0].LengthHigh = cpu_to_le32((u32)(len>>32));
		pSMB->Locks[0].OffsetLow = cpu_to_le32((u32)offset);
		pSMB->Locks[0].OffsetHigh = cpu_to_le32((u32)(offset>>32));
		count = sizeof(LOCKING_ANDX_RANGE);
	} else {
		/* oplock break */
		count = 0;
	}
	inc_rfc1001_len(pSMB, count);
	pSMB->ByteCount = cpu_to_le16(count);

	if (waitFlag) {
		rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
			(struct smb_hdr *) pSMB, &bytes_returned);
		cifs_small_buf_release(pSMB);
	} else {
		rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *)pSMB,
				      timeout);
		/* SMB buffer freed by function above */
	}
	cifs_stats_inc(&tcon->num_locks);
	if (rc)
		cFYI(1, "Send error in Lock = %d", rc);

	/* Note: On -EAGAIN error only caller can retry on handle based calls
	since file handle passed in no longer valid */
	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.