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Commitd48da36

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Check for stack overrun in standard_ProcessUtility().
ProcessUtility can recurse, and indeed can be driven to infiniterecursion, so it ought to have a check_stack_depth() call. Thiscovers the reported bug (portal trying to execute itself) and a bunchof other cases that could perhaps arise somewhere.Per bug #15428 from Malthe Borch. Back-patch to all supported branches.Discussion:https://postgr.es/m/15428-b3c2915ec470b033@postgresql.org
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‎src/backend/tcop/utility.c

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@@ -387,6 +387,9 @@ standard_ProcessUtility(PlannedStmt *pstmt,
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boolisAtomicContext= (!(context==PROCESS_UTILITY_TOPLEVEL||context==PROCESS_UTILITY_QUERY_NONATOMIC)||IsTransactionBlock());
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ParseState*pstate;
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/* This can recurse, so check for excessive recursion */
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check_stack_depth();
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check_xact_readonly(parsetree);
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if (completionTag)

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