From 955e9fc38c804ce72464738d9902bf908ffbad60 Mon Sep 17 00:00:00 2001
From: Kimball Thurston <kdt3rd@gmail.com>
Date: Thu, 30 Sep 2021 22:52:16 +1300
Subject: [PATCH] Also fail when the user provides a preview image that has a
 zero size coordinate

oss fuzz 39399

Signed-off-by: Kimball Thurston <kdt3rd@gmail.com>
---
 src/lib/OpenEXRCore/parse_header.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/OpenEXRCore/parse_header.c b/src/lib/OpenEXRCore/parse_header.c
index 0cb71acbfc..233610c2ea 100644
--- a/src/lib/OpenEXRCore/parse_header.c
+++ b/src/lib/OpenEXRCore/parse_header.c
@@ -720,7 +720,7 @@ extract_attr_preview (
             sz[0],
             sz[1]);
 
-    if (fsize > 0 && bytes >= (uint64_t) fsize)
+    if (bytes == 0 || (fsize > 0 && bytes >= (uint64_t) fsize))
     {
         return ctxt->print_error (
             ctxt,