diff --git a/src/backend/utils/adt/array_userfuncs.c b/src/backend/utils/adt/array_userfuncs.c
index c831a9395c..57bd7e82bc 100644
--- a/src/backend/utils/adt/array_userfuncs.c
+++ b/src/backend/utils/adt/array_userfuncs.c
@@ -723,12 +723,11 @@ array_agg_deserialize(PG_FUNCTION_ARGS)
 	sstate = PG_GETARG_BYTEA_PP(0);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	/* element_type */
 	element_type = pq_getmsgint(&buf, 4);
@@ -815,7 +814,6 @@ array_agg_deserialize(PG_FUNCTION_ARGS)
 	}
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	PG_RETURN_POINTER(result);
 }
@@ -1124,12 +1122,11 @@ array_agg_array_deserialize(PG_FUNCTION_ARGS)
 	sstate = PG_GETARG_BYTEA_PP(0);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	/* element_type */
 	element_type = pq_getmsgint(&buf, 4);
@@ -1187,7 +1184,6 @@ array_agg_array_deserialize(PG_FUNCTION_ARGS)
 	memcpy(result->lbs, temp, sizeof(result->lbs));
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	PG_RETURN_POINTER(result);
 }
diff --git a/src/backend/utils/adt/numeric.c b/src/backend/utils/adt/numeric.c
index 3c3184f15b..bf61fd7dbc 100644
--- a/src/backend/utils/adt/numeric.c
+++ b/src/backend/utils/adt/numeric.c
@@ -5190,12 +5190,11 @@ numeric_avg_deserialize(PG_FUNCTION_ARGS)
 	init_var(&tmp_var);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	result = makeNumericAggStateCurrentContext(false);
 
@@ -5222,7 +5221,6 @@ numeric_avg_deserialize(PG_FUNCTION_ARGS)
 	result->nInfcount = pq_getmsgint64(&buf);
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	free_var(&tmp_var);
 
@@ -5306,12 +5304,11 @@ numeric_deserialize(PG_FUNCTION_ARGS)
 	init_var(&tmp_var);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	result = makeNumericAggStateCurrentContext(false);
 
@@ -5342,7 +5339,6 @@ numeric_deserialize(PG_FUNCTION_ARGS)
 	result->nInfcount = pq_getmsgint64(&buf);
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	free_var(&tmp_var);
 
@@ -5677,12 +5673,11 @@ numeric_poly_deserialize(PG_FUNCTION_ARGS)
 	init_var(&tmp_var);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	result = makePolyNumAggStateCurrentContext(false);
 
@@ -5706,7 +5701,6 @@ numeric_poly_deserialize(PG_FUNCTION_ARGS)
 #endif
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	free_var(&tmp_var);
 
@@ -5868,12 +5862,11 @@ int8_avg_deserialize(PG_FUNCTION_ARGS)
 	init_var(&tmp_var);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	result = makePolyNumAggStateCurrentContext(false);
 
@@ -5889,7 +5882,6 @@ int8_avg_deserialize(PG_FUNCTION_ARGS)
 #endif
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	free_var(&tmp_var);
 
diff --git a/src/backend/utils/adt/varlena.c b/src/backend/utils/adt/varlena.c
index 72e1e24fe0..ec4e580d7f 100644
--- a/src/backend/utils/adt/varlena.c
+++ b/src/backend/utils/adt/varlena.c
@@ -5289,12 +5289,11 @@ string_agg_deserialize(PG_FUNCTION_ARGS)
 	sstate = PG_GETARG_BYTEA_PP(0);
 
 	/*
-	 * Copy the bytea into a StringInfo so that we can "receive" it using the
-	 * standard recv-function infrastructure.
+	 * Initialize a StringInfo so that we can "receive" it using the standard
+	 * recv-function infrastructure.
 	 */
-	initStringInfo(&buf);
-	appendBinaryStringInfo(&buf,
-						   VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
+	initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
+						   VARSIZE_ANY_EXHDR(sstate));
 
 	result = makeStringAggState(fcinfo);
 
@@ -5307,7 +5306,6 @@ string_agg_deserialize(PG_FUNCTION_ARGS)
 	appendBinaryStringInfo(result, data, datalen);
 
 	pq_getmsgend(&buf);
-	pfree(buf.data);
 
 	PG_RETURN_POINTER(result);
 }