From: Paul Ramsey <pramsey@cleverelephant.ca>
Date: Mon, 16 Apr 2018 17:26:57 +0000 (+0000)
Subject: Guard against lookup failure, to avoid segfault in internally called case (references... 
X-Git-Tag: 2.5.0alpha~28
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ff4e2443880834ff68eccaa77a9e0b0cfa325d16;p=postgis

Guard against lookup failure, to avoid segfault in internally called case (references #4067)


git-svn-id: http://svn.osgeo.org/postgis/trunk@16542 b70326c6-7e19-0410-871a-916f4a2858ee
---

diff --git a/libpgcommon/lwgeom_transform.c b/libpgcommon/lwgeom_transform.c
index a6c46c22b..b793635a9 100644
--- a/libpgcommon/lwgeom_transform.c
+++ b/libpgcommon/lwgeom_transform.c
@@ -696,6 +696,9 @@ SetSpatialRefSysSchema(FunctionCallInfo fcinfo)
 	if (!fcinfo || !fcinfo->flinfo) return;
 
 	nsp_name = get_namespace_name(get_func_namespace(fcinfo->flinfo->fn_oid));
+	/* early exit if we cannot lookup nsp_name, cf #4067 */
+	if (!nsp_name) return;
+
 	elog(DEBUG4, "%s located %s in namespace %s", __func__, get_func_name(fcinfo->flinfo->fn_oid), nsp_name);
 	spatialRefSysSchema = MemoryContextStrdup(CacheMemoryContext, nsp_name);;
 	return;