--- texinfo/install-info/install-info.c

+++ texinfo/install-info/install-info.c

@@ -799,13 +799,11 @@ readfile (char *filename, int *sizep,

     char **compression_program)

 {

   char *real_name;

-  FILE *f;

-  int filled = 0;

-  int data_size = 8192;

+  unsigned data_size = 8192, filled = 0;

   char *data = xmalloc (data_size);

   /* If they passed the space for the file name to return, use it.  */

-  f = open_possibly_compressed_file (filename, create_callback,

+  FILE *f = open_possibly_compressed_file (filename, create_callback,

                                      opened_filename ? opened_filename

                                                      : &real_name,

                                      compression_program);

@@ -819,9 +817,9 @@ readfile (char *filename, int *sizep,

         break;

       filled += nread;

-      if (filled == data_size)

+      if (data_size - filled < 8192)

         {

-          data_size += 65536;

+          data_size <<= 1;

           data = xrealloc (data, data_size);

         }

     }