From add78833eb84b40ca6b4b1d3985f287310e76c75 Mon Sep 17 00:00:00 2001
From: Kristian Evers <kristianevers@gmail.com>
Date: Wed, 24 May 2017 15:36:00 +0200
Subject: Avoid zero div. in pj_Convert_Geocentric_To_Geodetic().

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1800

Credit to OSS-Fuzz.
---
 src/geocent.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/geocent.c b/src/geocent.c
index 66e2c314..e340e73d 100644
--- a/src/geocent.c
+++ b/src/geocent.c
@@ -414,6 +414,11 @@ void pj_Convert_Geocentric_To_Geodetic (GeocentricInfo *gi,
 /*  ellipsoidal (geodetic) height */
         *Height = P*CPHI0+Z*SPHI0-RN*(1.0-gi->Geocent_e2*SPHI0*SPHI0);
 
+        /* avoid zero division */
+        if (RN+*Height==0.0) {
+            *Latitude = 0.0;
+            return;
+        }
         RK = gi->Geocent_e2*RN/(RN+*Height);
         RX = 1.0/sqrt(1.0-RK*(2.0-RK)*ST*ST);
         CPHI = ST*(1.0-RK)*RX;
-- 
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