From 4c8a5cb8c7f69dd227f03f32eb99b53ea0586aba Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Thu, 18 Apr 2019 22:12:55 +0200
Subject: isea: avoid invalid integer shift

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14286
Credit to OSS Fuzz
---
 src/projections/isea.cpp | 4 ++++
 1 file changed, 4 insertions(+)

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

diff --git a/src/projections/isea.cpp b/src/projections/isea.cpp
index 28510cb0..e8720b27 100644
--- a/src/projections/isea.cpp
+++ b/src/projections/isea.cpp
@@ -898,6 +898,10 @@ static int isea_hex(struct isea_dgg *g, int tri,
 
     quad = isea_ptdi(g, tri, pt, &v);
 
+    if( v.x < (INT_MIN >> 4) || v.x > (INT_MAX >> 4) )
+    {
+        throw "Invalid shift";
+    }
     hex->x = ((int)v.x << 4) + quad;
     hex->y = v.y;
 
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