From c2c1622f05d9b94444c8d5fe07aa378fe18269a8 Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Fri, 16 Mar 2018 12:06:03 +0100
Subject: [PATCH] Added extra checks to force an early exit.

---
 coders/pict.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/coders/pict.c b/coders/pict.c
index 67972026f..017866c7b 100644
--- a/coders/pict.c
+++ b/coders/pict.c
@@ -500,7 +500,7 @@ static unsigned char *DecodeImage(Image *blob,Image *image,
       scanline_length=ReadBlobMSBShort(blob);
     else
       scanline_length=1UL*ReadBlobByte(blob);
-    if (scanline_length >= row_bytes)
+    if ((scanline_length >= row_bytes) || (scanline_length == 0))
       {
         (void) ThrowMagickException(exception,GetMagickModule(),
           CorruptImageError,"UnableToUncompressImage","`%s'",image->filename);
@@ -945,6 +945,8 @@ static Image *ReadPICTImage(const ImageInfo *image_info,
       code=ReadBlobMSBSignedShort(image);
     if (code < 0)
       break;
+    if (code == 0)
+      continue;
     if (code > 0xa1)
       {
         if (image->debug != MagickFalse)
-- 
2.40.0