From 8ae2f83174808ac41324c33a749b9cb7ac7eca51 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 16 Apr 2019 22:02:26 +0200
Subject: omerc: avoid division by zero

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14279
Credit to OSS Fuzz
---
 src/projections/omerc.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/projections/omerc.cpp b/src/projections/omerc.cpp
index c0278043..e07c209e 100644
--- a/src/projections/omerc.cpp
+++ b/src/projections/omerc.cpp
@@ -201,6 +201,10 @@ PJ *PROJECTION(omerc) {
         L = pow(pj_tsfn(phi2, sin(phi2), P->e), Q->B);
         F = Q->E / H;
         p = (L - H) / (L + H);
+        if( p == 0 ) {
+            // Not quite, but es is very close to 1...
+            return pj_default_destructor(P, PJD_ERR_INVALID_ECCENTRICITY);
+        }
         J = Q->E * Q->E;
         J = (J - L * H) / (J + L * H);
         if ((con = lam1 - lam2) < -M_PI)
-- 
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