From: Tom Lane Date: Mon, 15 Oct 2018 18:01:38 +0000 (-0400) Subject: Check for stack overrun in standard_ProcessUtility(). X-Git-Tag: REL9_4_20~25 X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=eb01ea2a364404e69a0dbfe1545ba919c9943c63;p=postgresql.git Check for stack overrun in standard_ProcessUtility(). ProcessUtility can recurse, and indeed can be driven to infinite recursion, so it ought to have a check_stack_depth() call. This covers the reported bug (portal trying to execute itself) and a bunch of 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 --- diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c index 5633d5046c2..872c2e9ce5a 100644 --- a/src/backend/tcop/utility.c +++ b/src/backend/tcop/utility.c @@ -333,6 +333,9 @@ standard_ProcessUtility(Node *parsetree, { bool isTopLevel = (context == PROCESS_UTILITY_TOPLEVEL); + /* This can recurse, so check for excessive recursion */ + check_stack_depth(); + check_xact_readonly(parsetree); if (completionTag)