Hi,
The src/interfaces/ecpg/test/sql/bytea.pgc file contains the following code :
***
init();
exec sql truncate test;
exec sql insert into test values(:send_buf[0], :send_buf[1]);
exec sql insert into test values(:send_buf[0], :send_buf[1]);
exec sql select data1 into :recv_vlen_buf from test;
dump_binary(recv_vlen_buf[0].arr, recv_vlen_buf[0].len, 0);
dump_binary(recv_vlen_buf[1].arr, recv_vlen_buf[1].len, 0);
free(recv_vlen_buf);
***

recv_vlen_buf is initialized in the following way :
***
bytea recv_vlen_buf[][DATA_SIZE];
recv_vlen_buf = NULL
***

Thus, if the program behaves in an unexpected way and the transaction
is aborted before it executes the
"select data1 into :recv_vlen_buf from test" query, dump_binary will
refer to a null pointer. So, instead of an error
message, the user will see a segfault.

I think that in all such cases it is worth adding some checks into
.pgc and .c files (like in attached patch)

--
Best regards,
Daniil Davydov
From 36b01661fd6b9083b4cd1620020ebf4f737740b9 Mon Sep 17 00:00:00 2001
From: Daniil Davidov <davydovdaniil...@gmail.com>
Date: Tue, 10 Dec 2024 12:34:59 +0700
Subject: [PATCH] Fix refer to a null pointer

---
 src/interfaces/ecpg/test/expected/sql-bytea.c | 62 ++++++++++---------
 .../ecpg/test/expected/sql-bytea.stderr       | 62 +++++++++----------
 src/interfaces/ecpg/test/sql/bytea.pgc        | 10 ++-
 3 files changed, 71 insertions(+), 63 deletions(-)

diff --git a/src/interfaces/ecpg/test/expected/sql-bytea.c b/src/interfaces/ecpg/test/expected/sql-bytea.c
index 8338c6008d..c0cd962d90 100644
--- a/src/interfaces/ecpg/test/expected/sql-bytea.c
+++ b/src/interfaces/ecpg/test/expected/sql-bytea.c
@@ -254,37 +254,41 @@ if (sqlca.sqlcode < 0) sqlprint();}
 if (sqlca.sqlcode < 0) sqlprint();}
 #line 90 "bytea.pgc"
 
-	dump_binary(recv_vlen_buf[0].arr, recv_vlen_buf[0].len, 0);
-	dump_binary(recv_vlen_buf[1].arr, recv_vlen_buf[1].len, 0);
-	free(recv_vlen_buf);
+
+	if (recv_vlen_buf != NULL)
+	{
+		dump_binary(recv_vlen_buf[0].arr, recv_vlen_buf[0].len, 0);
+		dump_binary(recv_vlen_buf[1].arr, recv_vlen_buf[1].len, 0);
+		free(recv_vlen_buf);
+	}
 
 	/* Test for dynamic sql statement with normal host variable, indicator */
 	init();
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "truncate test", ECPGt_EOIT, ECPGt_EORT);
-#line 97 "bytea.pgc"
+#line 101 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 97 "bytea.pgc"
+#line 101 "bytea.pgc"
 
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_execute, "ins_stmt", 
 	ECPGt_bytea,&(send_buf[0]),(long)512,(long)1,sizeof(struct bytea_1), 
 	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
 	ECPGt_bytea,&(send_buf[1]),(long)512,(long)1,sizeof(struct bytea_1), 
 	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);
-#line 98 "bytea.pgc"
+#line 102 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 98 "bytea.pgc"
+#line 102 "bytea.pgc"
 
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_execute, "sel_stmt", ECPGt_EOIT, 
 	ECPGt_bytea,&(recv_buf[0]),(long)DATA_SIZE,(long)1,sizeof(struct bytea_2), 
 	ECPGt_int,&(ind[0]),(long)1,(long)1,sizeof(int), 
 	ECPGt_bytea,&(recv_short_buf),(long)DATA_SIZE - LACK_SIZE,(long)1,sizeof(struct bytea_4), 
 	ECPGt_int,&(ind[1]),(long)1,(long)1,sizeof(int), ECPGt_EORT);
-#line 99 "bytea.pgc"
+#line 103 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 99 "bytea.pgc"
+#line 103 "bytea.pgc"
 
 	dump_binary(recv_buf[0].arr, recv_buf[0].len, ind[0]);
 	dump_binary(recv_short_buf.arr, recv_short_buf.len, ind[1]);
@@ -292,81 +296,81 @@ if (sqlca.sqlcode < 0) sqlprint();}
 	/* Test for dynamic sql statement with sql descriptor */
 	init();
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "truncate test", ECPGt_EOIT, ECPGt_EORT);
-#line 105 "bytea.pgc"
+#line 109 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 105 "bytea.pgc"
+#line 109 "bytea.pgc"
 
 	{ ECPGset_desc(__LINE__, "idesc", 1,ECPGd_data,
 	ECPGt_bytea,&(send_buf[0]),(long)512,(long)1,sizeof(struct bytea_1), ECPGd_EODT);
 
-#line 106 "bytea.pgc"
+#line 110 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 106 "bytea.pgc"
+#line 110 "bytea.pgc"
 
 	{ ECPGset_desc(__LINE__, "idesc", 2,ECPGd_data,
 	ECPGt_bytea,&(send_buf[1]),(long)512,(long)1,sizeof(struct bytea_1), ECPGd_EODT);
 
-#line 107 "bytea.pgc"
+#line 111 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 107 "bytea.pgc"
+#line 111 "bytea.pgc"
 
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_execute, "ins_stmt", 
 	ECPGt_descriptor, "idesc", 1L, 1L, 1L, 
 	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);
-#line 108 "bytea.pgc"
+#line 112 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 108 "bytea.pgc"
+#line 112 "bytea.pgc"
 
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_execute, "sel_stmt", ECPGt_EOIT, 
 	ECPGt_descriptor, "odesc", 1L, 1L, 1L, 
 	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EORT);
-#line 109 "bytea.pgc"
+#line 113 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 109 "bytea.pgc"
+#line 113 "bytea.pgc"
 
 	{ ECPGget_desc(__LINE__, "odesc", 1,ECPGd_indicator,
 	ECPGt_int,&(ind[0]),(long)1,(long)1,sizeof(int), ECPGd_data,
 	ECPGt_bytea,&(recv_buf[0]),(long)DATA_SIZE,(long)1,sizeof(struct bytea_2), ECPGd_EODT);
 
-#line 110 "bytea.pgc"
+#line 114 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 110 "bytea.pgc"
+#line 114 "bytea.pgc"
 
 	{ ECPGget_desc(__LINE__, "odesc", 2,ECPGd_indicator,
 	ECPGt_int,&(ind[1]),(long)1,(long)1,sizeof(int), ECPGd_data,
 	ECPGt_bytea,&(recv_short_buf),(long)DATA_SIZE - LACK_SIZE,(long)1,sizeof(struct bytea_4), ECPGd_EODT);
 
-#line 111 "bytea.pgc"
+#line 115 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 111 "bytea.pgc"
+#line 115 "bytea.pgc"
 
 	dump_binary(recv_buf[0].arr, recv_buf[0].len, ind[0]);
 	dump_binary(recv_short_buf.arr, recv_short_buf.len, ind[1]);
 
 	{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "drop table test", ECPGt_EOIT, ECPGt_EORT);
-#line 115 "bytea.pgc"
+#line 119 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 115 "bytea.pgc"
+#line 119 "bytea.pgc"
 
 	{ ECPGtrans(__LINE__, NULL, "commit");
-#line 116 "bytea.pgc"
+#line 120 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 116 "bytea.pgc"
+#line 120 "bytea.pgc"
 
 	{ ECPGdisconnect(__LINE__, "CURRENT");
-#line 117 "bytea.pgc"
+#line 121 "bytea.pgc"
 
 if (sqlca.sqlcode < 0) sqlprint();}
-#line 117 "bytea.pgc"
+#line 121 "bytea.pgc"
 
 
 	return 0;
diff --git a/src/interfaces/ecpg/test/expected/sql-bytea.stderr b/src/interfaces/ecpg/test/expected/sql-bytea.stderr
index cb828a7602..b73679495c 100644
--- a/src/interfaces/ecpg/test/expected/sql-bytea.stderr
+++ b/src/interfaces/ecpg/test/expected/sql-bytea.stderr
@@ -117,71 +117,71 @@ SQL error: invalid statement name "cursor1" on line 82
 [NO_PID]: sqlca: code: 0, state: 00000
 [NO_PID]: ecpg_get_data on line 90: RESULT: \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 offset: -1; array: no
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 97: query: truncate test; with 0 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 101: query: truncate test; with 0 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 97: using PQexec
+[NO_PID]: ecpg_execute on line 101: using PQexec
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 97: OK: TRUNCATE TABLE
+[NO_PID]: ecpg_process_output on line 101: OK: TRUNCATE TABLE
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 98: query: insert into test values($1,$2); with 2 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 102: query: insert into test values($1,$2); with 2 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 98: using PQexecPrepared for "insert into test values($1,$2)"
+[NO_PID]: ecpg_execute on line 102: using PQexecPrepared for "insert into test values($1,$2)"
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_free_params on line 98: parameter 1 = 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
+[NO_PID]: ecpg_free_params on line 102: parameter 1 = 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
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_free_params on line 98: parameter 2 = 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
+[NO_PID]: ecpg_free_params on line 102: parameter 2 = 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
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 98: OK: INSERT 0 1
+[NO_PID]: ecpg_process_output on line 102: OK: INSERT 0 1
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 99: query: select data1,data2 from test; with 0 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 103: query: select data1,data2 from test; with 0 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 99: using PQexecPrepared for "select data1,data2 from test"
+[NO_PID]: ecpg_execute on line 103: using PQexecPrepared for "select data1,data2 from test"
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 99: correctly got 1 tuples with 2 fields
+[NO_PID]: ecpg_process_output on line 103: correctly got 1 tuples with 2 fields
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_get_data on line 99: RESULT: \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 offset: -1; array: no
+[NO_PID]: ecpg_get_data on line 103: RESULT: \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 offset: -1; array: no
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_get_data on line 99: RESULT: \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 offset: -1; array: no
+[NO_PID]: ecpg_get_data on line 103: RESULT: \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 offset: -1; array: no
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 105: query: truncate test; with 0 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 109: query: truncate test; with 0 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 105: using PQexec
+[NO_PID]: ecpg_execute on line 109: using PQexec
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 105: OK: TRUNCATE TABLE
+[NO_PID]: ecpg_process_output on line 109: OK: TRUNCATE TABLE
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 108: query: insert into test values($1,$2); with 2 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 112: query: insert into test values($1,$2); with 2 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 108: using PQexecPrepared for "insert into test values($1,$2)"
+[NO_PID]: ecpg_execute on line 112: using PQexecPrepared for "insert into test values($1,$2)"
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_free_params on line 108: parameter 1 = 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
+[NO_PID]: ecpg_free_params on line 112: parameter 1 = 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
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_free_params on line 108: parameter 2 = 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
+[NO_PID]: ecpg_free_params on line 112: parameter 2 = 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
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 108: OK: INSERT 0 1
+[NO_PID]: ecpg_process_output on line 112: OK: INSERT 0 1
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 109: query: select data1,data2 from test; with 0 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 113: query: select data1,data2 from test; with 0 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 109: using PQexecPrepared for "select data1,data2 from test"
+[NO_PID]: ecpg_execute on line 113: using PQexecPrepared for "select data1,data2 from test"
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 109: correctly got 1 tuples with 2 fields
+[NO_PID]: ecpg_process_output on line 113: correctly got 1 tuples with 2 fields
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 109: putting result (1 tuples) into descriptor odesc
+[NO_PID]: ecpg_process_output on line 113: putting result (1 tuples) into descriptor odesc
 [NO_PID]: sqlca: code: 0, state: 00000
 [NO_PID]: ECPGget_desc: reading items for tuple 1
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_get_data on line 110: RESULT: \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 offset: -1; array: no
+[NO_PID]: ecpg_get_data on line 114: RESULT: \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 offset: -1; array: no
 [NO_PID]: sqlca: code: 0, state: 00000
 [NO_PID]: ECPGget_desc: reading items for tuple 2
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_get_data on line 111: RESULT: \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 offset: -1; array: no
+[NO_PID]: ecpg_get_data on line 115: RESULT: \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 offset: -1; array: no
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 115: query: drop table test; with 0 parameter(s) on connection ecpg1_regression
+[NO_PID]: ecpg_execute on line 119: query: drop table test; with 0 parameter(s) on connection ecpg1_regression
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_execute on line 115: using PQexec
+[NO_PID]: ecpg_execute on line 119: using PQexec
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ecpg_process_output on line 115: OK: DROP TABLE
+[NO_PID]: ecpg_process_output on line 119: OK: DROP TABLE
 [NO_PID]: sqlca: code: 0, state: 00000
-[NO_PID]: ECPGtrans on line 116: action "commit"; connection "ecpg1_regression"
+[NO_PID]: ECPGtrans on line 120: action "commit"; connection "ecpg1_regression"
 [NO_PID]: sqlca: code: 0, state: 00000
 [NO_PID]: deallocate_one on line 0: name sel_stmt
 [NO_PID]: sqlca: code: 0, state: 00000
diff --git a/src/interfaces/ecpg/test/sql/bytea.pgc b/src/interfaces/ecpg/test/sql/bytea.pgc
index e874123119..f7ce4721fa 100644
--- a/src/interfaces/ecpg/test/sql/bytea.pgc
+++ b/src/interfaces/ecpg/test/sql/bytea.pgc
@@ -88,9 +88,13 @@ while (0)
 	exec sql insert into test values(:send_buf[0], :send_buf[1]);
 	exec sql insert into test values(:send_buf[0], :send_buf[1]);
 	exec sql select data1 into :recv_vlen_buf from test;
-	dump_binary(recv_vlen_buf[0].arr, recv_vlen_buf[0].len, 0);
-	dump_binary(recv_vlen_buf[1].arr, recv_vlen_buf[1].len, 0);
-	free(recv_vlen_buf);
+
+	if (recv_vlen_buf != NULL)
+	{
+		dump_binary(recv_vlen_buf[0].arr, recv_vlen_buf[0].len, 0);
+		dump_binary(recv_vlen_buf[1].arr, recv_vlen_buf[1].len, 0);
+		free(recv_vlen_buf);
+	}
 
 	/* Test for dynamic sql statement with normal host variable, indicator */
 	init();
-- 
2.43.0

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