https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6780

diff --git a/coders/wpg.c b/coders/wpg.c
index f0cfdc9d3c08c53b15d301d3abaffb3a211a290f..7e25a52b321b022516653745aa41febbd5515ac0 100644 (file)
--- a/coders/wpg.c
+++ b/coders/wpg.c
@@ -565,6 +565,7 @@ static int UnpackWPG2Raster(Image *image,int bpp,ExceptionInfo *exception)
     sizeof(*BImgBuff));
   if(BImgBuff==NULL)
     return(-2);
+  (void) ResetMagickMemory(BImgBuff,0,ldblk*sizeof(*BImgBuff));
 
   while( y< image->rows)
     {