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postgres_fdw and dblink should check if backend has MyProcPort

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before checking ->has_scram_keys.  MyProcPort is NULL in background
workers.  So this could crash for example if a background worker
accessed a suitable configured foreign table.

Author: Alexander Pyhalov <a.pyhalov@postgrespro.ru>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Matheus Alcantara <matheusssilv97@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/27b29a35-9b96-46a9-bc1a-914140869dac%40gmail.com
This commit is contained in:
Peter Eisentraut
2025-08-08 19:34:31 +02:00
parent 41aac1483a
commit 762fed90bf
2 changed files with 8 additions and 8 deletions
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8
contrib/postgres_fdw/connection.c
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@@ -462,7 +462,7 @@ pgfdw_security_check(const char **keywords, const char **values, UserMapping *us
* assume that UseScramPassthrough is also true since SCRAM options are
* only set when UseScramPassthrough is enabled.
*/
if (MyProcPort->has_scram_keys && pgfdw_has_required_scram_options(keywords, values))
if (MyProcPort != NULL && MyProcPort->has_scram_keys && pgfdw_has_required_scram_options(keywords, values))
return;
ereport(ERROR,
@@ -568,7 +568,7 @@ connect_pg_server(ForeignServer *server, UserMapping *user)
n++;
/* Add required SCRAM pass-through connection options if it's enabled. */
if (MyProcPort->has_scram_keys && UseScramPassthrough(server, user))
if (MyProcPort != NULL && MyProcPort->has_scram_keys && UseScramPassthrough(server, user))
{
int len;
int encoded_len;
@@ -743,7 +743,7 @@ check_conn_params(const char **keywords, const char **values, UserMapping *user)
* assume that UseScramPassthrough is also true since SCRAM options are
* only set when UseScramPassthrough is enabled.
*/
if (MyProcPort->has_scram_keys && pgfdw_has_required_scram_options(keywords, values))
if (MyProcPort != NULL && MyProcPort->has_scram_keys && pgfdw_has_required_scram_options(keywords, values))
return;
ereport(ERROR,
@@ -2557,7 +2557,7 @@ pgfdw_has_required_scram_options(const char **keywords, const char **values)
}
}
has_scram_keys = has_scram_client_key && has_scram_server_key && MyProcPort->has_scram_keys;
has_scram_keys = has_scram_client_key && has_scram_server_key && MyProcPort != NULL && MyProcPort->has_scram_keys;
return (has_scram_keys && has_require_auth);
}