shithub: jbig2

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Add sanity check on image sizes.

Inspired by bug 697395, but doesn't actually solve any problem
seen in that bug (or at least, not that I can see, as I can't
reproduce the problem with file2).

--- a/jbig2_image.c

+++ b/jbig2_image.c

@@ -38,6 +38,13 @@

     uint32_t stride;

     int64_t check;

+    if (width == 0 || height == 0) {

+        jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1,

+            "zero width (%d) or height (%d) in jbig2_image_new",

+            width, height);

+        return NULL;

+    }

+

     image = jbig2_new(ctx, Jbig2Image, 1);

     if (image == NULL) {

         jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1, "could not allocate image structure in jbig2_image_new");