From fd1700e493b7caf2d028d35c86e54935b5f255dc Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sat, 11 Nov 2017 22:31:24 +0100
Subject: PJ_ob_tran: avoid null pointer dereference when underling fwd method
 is NULL. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3645.
 Credit to OSS Fuzz

---
 src/PJ_ob_tran.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/PJ_ob_tran.c b/src/PJ_ob_tran.c
index 4f064809..61724202 100644
--- a/src/PJ_ob_tran.c
+++ b/src/PJ_ob_tran.c
@@ -228,10 +228,10 @@ PJ *PROJECTION(ob_tran) {
     if (fabs(phip) > TOL) { /* oblique */
         Q->cphip = cos(phip);
         Q->sphip = sin(phip);
-        P->fwd = o_forward;
+        P->fwd = Q->link->fwd ? o_forward : 0;
         P->inv = Q->link->inv ? o_inverse : 0;
     } else { /* transverse */
-        P->fwd = t_forward;
+        P->fwd = Q->link->fwd ? t_forward : 0;
         P->inv = Q->link->inv ? t_inverse : 0;
     }
 
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