Coders: proper check for out of bounds per https://bugs.chromium.org/…

…p/oss-fuzz/issues/detail?id=45640
ImageMagick · Mar 17, 2022 · 5468786 · 5468786
1 parent 78f03b6
commit 5468786
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/coders/dcm.c b/coders/dcm.c
@@ -4116,7 +4116,7 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
             {
               index=redmap[i];
               if ((info.scale != (Quantum *) NULL) && (index >= 0) &&
-                  (index <= (int) info.max_value))
+                  (index <= (int) info.scale_size))
                 index=(int) info.scale[index];
               image->colormap[i].red=(Quantum) index;
             }
@@ -4125,7 +4125,7 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
             {
               index=greenmap[i];
               if ((info.scale != (Quantum *) NULL) && (index >= 0) &&
-                  (index <= (int) info.max_value))
+                  (index <= (int) info.scale_size))
                 index=(int) info.scale[index];
               image->colormap[i].green=(Quantum) index;
             }
@@ -4134,7 +4134,7 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
             {
               index=bluemap[i];
               if ((info.scale != (Quantum *) NULL) && (index >= 0) &&
-                  (index <= (int) info.max_value))
+                  (index <= (int) info.scale_size))
                 index=(int) info.scale[index];
               image->colormap[i].blue=(Quantum) index;
             }
@@ -4143,7 +4143,7 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
             {
               index=graymap[i];
               if ((info.scale != (Quantum *) NULL) && (index >= 0) &&
-                  (index <= (int) info.max_value))
+                  (index <= (int) info.scale_size))
                 index=(int) info.scale[index];
               image->colormap[i].red=(Quantum) index;
               image->colormap[i].green=(Quantum) index;