From: Michael Paquier <michael@paquier.xyz>
Date: Wed, 28 Apr 2021 02:58:55 +0000 (+0900)
Subject: Fix use-after-release issue with pg_identify_object_as_address()
X-Git-Tag: REL_10_17~13
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=b797918d27cc532b4835d87c676de34d4b9ee9bd;p=postgresql.git

Fix use-after-release issue with pg_identify_object_as_address()

Spotted by buildfarm member prion, with -DRELCACHE_FORCE_RELEASE.

Introduced in f7aab36.

Discussion: https://postgr.es/m/2759018.1619577848@sss.pgh.pa.us
Backpatch-through: 9.6
---

diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index fa2da451ab8..b0ff255a593 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -4953,7 +4953,7 @@ getObjectIdentityParts(const ObjectAddress *object,
 					elog(ERROR, "cache lookup failed for event trigger %u",
 						 object->objectId);
 				trigForm = (Form_pg_event_trigger) GETSTRUCT(tup);
-				evtname = NameStr(trigForm->evtname);
+				evtname = pstrdup(NameStr(trigForm->evtname));
 				appendStringInfoString(&buffer, quote_identifier(evtname));
 				if (objname)
 					*objname = list_make1(evtname);