check size, fix issue #83

saitoha · Aug 29, 2019 · 9c013f2 · 9c013f2
1 parent 2df6437
commit 9c013f2
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/fromsixel.c b/src/fromsixel.c
@@ -729,6 +729,10 @@ sixel_decode_raw_impl(
                 if (context->repeat_count == 0) {
                     context->repeat_count = 1;
                 }
+                if (context->repeat_count > 0xffff) { /* check too huge number */
+                    status = SIXEL_BAD_INPUT;
+                    goto end;
+                }
                 context->state = PS_DECSIXEL;
                 context->param = 0;
                 context->nparams = 0;