From 86471c88e0727c0e85766b6da8c088c836cc3105 Mon Sep 17 00:00:00 2001
From: Ingo Weyrich <heckflosse67@gmx.de>
Date: Mon, 24 Aug 2020 14:04:47 +0200
Subject: [PATCH] Canon EOS R5 CR3 pegs cpu at 100% with no GUI, #5882

---
 rtengine/canon_cr3_decoder.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rtengine/canon_cr3_decoder.cc b/rtengine/canon_cr3_decoder.cc
index f9850189c..51beb66f3 100644
--- a/rtengine/canon_cr3_decoder.cc
+++ b/rtengine/canon_cr3_decoder.cc
@@ -602,7 +602,9 @@ int DCraw::parseCR3(
                             relpos_inBox += lTag;
                         }
                     }
-
+                    if (!szItem) {
+                        goto fin;
+                    }
                     relpos_inDir += szItem;
                 }