https://github.com/ImageMagick/ImageMagick/issues/120

diff --git a/coders/wpg.c b/coders/wpg.c
index 964530533ea4a7d62048454b5f68bd95176d57c2..b01dcf9cc63aba8cd8137ab71fa15b2e256fd727 100644 (file)
--- a/coders/wpg.c
+++ b/coders/wpg.c
@@ -1331,7 +1331,7 @@ static Image *ReadWPGImage(const ImageInfo *image_info,
                   {
                     ldblk=(ssize_t) ((bpp*image->columns+7)/8);
                     BImgBuff=(unsigned char *) AcquireQuantumMemory((size_t)
-                      ldblk,sizeof(*BImgBuff));
+                      ldblk+1,sizeof(*BImgBuff));
                     if (BImgBuff == (unsigned char *) NULL)
                       goto NoMemory;