From e08b7bddd25349a24a294616e4d9c984c138e531 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 26 Mar 2019 15:49:42 +0100
Subject: omerc inverse: fix division

Test case https://oss-fuzz.com/testcase-detail/5739351578771456 of
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13894
Credit to OSS Fuzz
---
 src/projections/omerc.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/projections/omerc.cpp')

diff --git a/src/projections/omerc.cpp b/src/projections/omerc.cpp
index e9b7b4a0..c33f6489 100644
--- a/src/projections/omerc.cpp
+++ b/src/projections/omerc.cpp
@@ -97,6 +97,10 @@ static PJ_LP e_inverse (PJ_XY xy, PJ *P) {          /* Ellipsoidal, inverse */
         u = xy.y * Q->cosrot + xy.x * Q->sinrot + Q->u_0;
     }
     Qp = exp(- Q->BrA * v);
+    if( Qp == 0 ) {
+        proj_errno_set(P, PJD_ERR_INVALID_X_OR_Y);
+        return proj_coord_error().lp;
+    }
     Sp = .5 * (Qp - 1. / Qp);
     Tp = .5 * (Qp + 1. / Qp);
     Vp = sin(Q->BrA * u);
-- 
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