From 8bc74490df252215ce5b618442900e7a107be2a1 Mon Sep 17 00:00:00 2001 From: Michael Paquier Date: Mon, 1 Jun 2020 14:41:32 +0900 Subject: [PATCH] Fix use-after-release mistake in currtid() and currtid2() for views This issue has been present since the introduction of this code as of a3519a2 from 2002, and has been found by buildfarm member prion that uses RELCACHE_FORCE_RELEASE via the tests introduced recently in e786be5. Discussion: https://postgr.es/m/20200601022055.GB4121@paquier.xyz Backpatch-through: 9.5 --- src/backend/utils/adt/tid.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/backend/utils/adt/tid.c b/src/backend/utils/adt/tid.c index 41d540b46e..c1b4d85438 100644 --- a/src/backend/utils/adt/tid.c +++ b/src/backend/utils/adt/tid.c @@ -309,8 +309,13 @@ currtid_for_view(Relation viewrel, ItemPointer tid) rte = rt_fetch(var->varno, query->rtable); if (rte) { + Datum result; + + result = DirectFunctionCall2(currtid_byreloid, + ObjectIdGetDatum(rte->relid), + PointerGetDatum(tid)); heap_close(viewrel, AccessShareLock); - return DirectFunctionCall2(currtid_byreloid, ObjectIdGetDatum(rte->relid), PointerGetDatum(tid)); + return result; } } }