[sbix] Fix memory leak in early return

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11210
2018-10-30 17:05:28 +02:00 · 2018-10-30 17:05:28 +02:00 · 0af3d176a6
commit 0af3d176a6
parent edaa768253
2 changed files with 3 additions and 0 deletions
--- a/src/hb-ot-color-sbix-table.hh
+++ b/src/hb-ot-color-sbix-table.hh
@ -244,7 +244,10 @@ struct sbix
      hb_blob_t *blob = reference_png (font, glyph, &x_offset, &y_offset, &strike_ppem);

      if (unlikely (blob->length < sizeof (PNGHeader)))
+      {
+        hb_blob_destroy (blob);
        return false;
+      }

      const PNGHeader &png = *blob->as<PNGHeader>();

--- a/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-shape-fuzzer-5768601332613120
+++ b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-shape-fuzzer-5768601332613120