shithub: jbig2

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jbig2dec: Attempting to compose NULL on a page is silently accepted.

--- a/jbig2_image.c

+++ b/jbig2_image.c

@@ -256,6 +256,9 @@

     uint8_t *d, *dd;

     uint8_t mask, rightmask;

+    if (src == NULL)

+        return 0;

+

     if (op != JBIG2_COMPOSE_OR) {

         /* hand off the the general routine */

         return jbig2_image_compose_unopt(ctx, dst, src, x, y, op);