Given the following code containing errors, provide Common Weakness Enumeration (CWE) identifiers and corresponding messages in JSON format. Each identified weakness should have a unique entry in the JSON array.
    Code: CopyGetData(CopyState cstate, void *databuf, int minread, int maxread)
{
	int			bytesread = 0;

	switch (cstate->copy_dest)
	{
		case COPY_FILE:
			bytesread = fread(databuf, 1, maxread, cstate->copy_file);
			if (ferror(cstate->copy_file))
				ereport(ERROR,
						(errcode_for_file_access(),
						 errmsg("could not read from COPY file: %m")));
			break;
		case COPY_OLD_FE:

			/*
			 * We cannot read more than minread bytes (which in practice is 1)
			 * because old protocol doesn't have any clear way of separating
			 * the COPY stream from following data.  This is slow, but not any
			 * slower than the code path was originally, and we don't care
			 * much anymore about the performance of old protocol.
			 */
			if (pq_getbytes((char *) databuf, minread))
			{
				/* Only a \. terminator is legal EOF in old protocol */
				ereport(ERROR,
						(errcode(ERRCODE_CONNECTION_FAILURE),
						 errmsg("unexpected EOF on client connection with an open transaction")));
			}
			bytesread = minread;
			break;
		case COPY_NEW_FE:
			while (maxread > 0 && bytesread < minread && !cstate->fe_eof)
			{
				int			avail;

				while (cstate->fe_msgbuf->cursor >= cstate->fe_msgbuf->len)
				{
					/* Try to receive another message */
					int			mtype;

			readmessage:
					mtype = pq_getbyte();
					if (mtype == EOF)
						ereport(ERROR,
								(errcode(ERRCODE_CONNECTION_FAILURE),
								 errmsg("unexpected EOF on client connection with an open transaction")));
					if (pq_getmessage(cstate->fe_msgbuf, 0))
						ereport(ERROR,
								(errcode(ERRCODE_CONNECTION_FAILURE),
								 errmsg("unexpected EOF on client connection with an open transaction")));
					switch (mtype)
					{
						case 'd':		/* CopyData */
							break;
						case 'c':		/* CopyDone */
							/* COPY IN correctly terminated by frontend */
							cstate->fe_eof = true;
							return bytesread;
						case 'f':		/* CopyFail */
							ereport(ERROR,
									(errcode(ERRCODE_QUERY_CANCELED),
									 errmsg("COPY from stdin failed: %s",
									   pq_getmsgstring(cstate->fe_msgbuf))));
							break;
						case 'H':		/* Flush */
						case 'S':		/* Sync */

							/*
							 * Ignore Flush/Sync for the convenience of client
							 * libraries (such as libpq) that may send those
							 * without noticing that the command they just
							 * sent was COPY.
							 */
							goto readmessage;
						default:
							ereport(ERROR,
									(errcode(ERRCODE_PROTOCOL_VIOLATION),
									 errmsg("unexpected message type 0x%02X during COPY from stdin",
											mtype)));
							break;
					}
				}
				avail = cstate->fe_msgbuf->len - cstate->fe_msgbuf->cursor;
				if (avail > maxread)
					avail = maxread;
				pq_copymsgbytes(cstate->fe_msgbuf, databuf, avail);
				databuf = (void *) ((char *) databuf + avail);
				maxread -= avail;
				bytesread += avail;
			}
			break;
	}

	return bytesread;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-89'], 'message': 'Be more careful to not lose sync in the FE/BE protocol.

If any error occurred while we were in the middle of reading a protocol
message from the client, we could lose sync, and incorrectly try to
interpret a part of another message as a new protocol message. That will
usually lead to an "invalid frontend message" error that terminates the
connection. However, this is a security issue because an attacker might
be able to deliberately cause an error, inject a Query message in what's
supposed to be just user data, and have the server execute it.

We were quite careful to not have CHECK_FOR_INTERRUPTS() calls or other
operations that could ereport(ERROR) in the middle of processing a message,
but a query cancel interrupt or statement timeout could nevertheless cause
it to happen. Also, the V2 fastpath and COPY handling were not so careful.
It's very difficult to recover in the V2 COPY protocol, so we will just
terminate the connection on error. In practice, that's what happened
previously anyway, as we lost protocol sync.

To fix, add a new variable in pqcomm.c, PqCommReadingMsg, that is set
whenever we're in the middle of reading a message. When it's set, we cannot
safely ERROR out and continue running, because we might've read only part
of a message. PqCommReadingMsg acts somewhat similarly to critical sections
in that if an error occurs while it's set, the error handler will force the
connection to be terminated, as if the error was FATAL. It's not
implemented by promoting ERROR to FATAL in elog.c, like ERROR is promoted
to PANIC in critical sections, because we want to be able to use
PG_TRY/CATCH to recover and regain protocol sync. pq_getmessage() takes
advantage of that to prevent an OOM error from terminating the connection.

To prevent unnecessary connection terminations, add a holdoff mechanism
similar to HOLD/RESUME_INTERRUPTS() that can be used hold off query cancel
interrupts, but still allow die interrupts. The rules on which interrupts
are processed when are now a bit more complicated, so refactor
ProcessInterrupts() and the calls to it in signal handlers so that the
signal handlers always call it if ImmediateInterruptOK is set, and
ProcessInterrupts() can decide to not do anything if the other conditions
are not met.

Reported by Emil Lenngren. Patch reviewed by Noah Misch and Andres Freund.
Backpatch to all supported versions.

Security: CVE-2015-0244'