From: Paul Ramsey <pramsey@cleverelephant.ca>
Date: Fri, 16 Aug 2019 20:59:43 +0000 (+0000)
Subject: Avoid reading into empty ptarray
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=edd5134deb592b8c6eeefcbb9e430e6b04728e64;p=postgis

Avoid reading into empty ptarray
References #4475


git-svn-id: http://svn.osgeo.org/postgis/branches/2.3@17721 b70326c6-7e19-0410-871a-916f4a2858ee
---

diff --git a/liblwgeom/g_serialized.c b/liblwgeom/g_serialized.c
index 167ed84d3..ded19115d 100644
--- a/liblwgeom/g_serialized.c
+++ b/liblwgeom/g_serialized.c
@@ -706,7 +706,8 @@ static size_t gserialized_from_lwpoly(const LWPOLY *poly, uint8_t *buf)
 			lwerror("Dimensions mismatch in lwpoly");
 
 		pasize = pa->npoints * ptsize;
-		memcpy(loc, getPoint_internal(pa, 0), pasize);
+		if ( pasize )
+			memcpy(loc, getPoint_internal(pa, 0), pasize);
 		loc += pasize;
 	}
 	return (size_t)(loc - buf);