File ImageMagick-CVE-2019-13304,13305,13306.patch of Package ImageMagick.17846

Index: ImageMagick-7.0.7-34/coders/pnm.c
===================================================================
--- ImageMagick-7.0.7-34.orig/coders/pnm.c	2018-05-20 17:55:43.000000000 +0200
+++ ImageMagick-7.0.7-34/coders/pnm.c	2019-07-18 11:44:16.044760360 +0200
@@ -1746,13 +1746,13 @@ static MagickBooleanType WritePNMImage(c
           {
             *q++=(unsigned char) (GetPixelLuma(image,p) >= (QuantumRange/2.0) ?
               '0' : '1');
-            *q++=' ';
             if ((q-pixels+1) >= (ssize_t) sizeof(pixels))
               {
                 *q++='\n';
                 (void) WriteBlob(image,q-pixels,pixels);
                 q=pixels;
               }
+            *q++=' ';
             p+=GetPixelChannels(image);
           }
           *q++='\n';
@@ -1814,14 +1814,14 @@ static MagickBooleanType WritePNMImage(c
                 count=(ssize_t) FormatLocaleString(buffer,MagickPathExtent,
                   "%u ",ScaleQuantumToLong(index));
             extent=(size_t) count;
-            (void) strncpy((char *) q,buffer,extent);
-            q+=extent;
             if ((q-pixels+extent+1) >= sizeof(pixels))
               {
                 *q++='\n';
                 (void) WriteBlob(image,q-pixels,pixels);
                 q=pixels;
               }
+            (void) strncpy((char *) q,buffer,extent);
+            q+=extent;
             p+=GetPixelChannels(image);
           }
           *q++='\n';
@@ -1889,14 +1889,14 @@ static MagickBooleanType WritePNMImage(c
                   ScaleQuantumToLong(GetPixelGreen(image,p)),
                   ScaleQuantumToLong(GetPixelBlue(image,p)));
             extent=(size_t) count;
-            (void) strncpy((char *) q,buffer,extent);
-            q+=extent;
-            if ((q-pixels+extent+1) >= sizeof(pixels))
+            if ((q-pixels+extent+2) >= sizeof(pixels))
               {
                 *q++='\n';
                 (void) WriteBlob(image,q-pixels,pixels);
                 q=pixels;
               }
+            (void) strncpy((char *) q,buffer,extent);
+            q+=extent;
             p+=GetPixelChannels(image);
           }
           *q++='\n';