shithub: dav1d

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frame-mt: set b->filter2d for intra bc blocks

Fixes #154, index out of bounds in decode_b() with
clusterfuzz-testcase-minimized-dav1d_fuzzer_mt-5750775674830848. Credits
to oss-fuzz.

--- a/src/decode.c

+++ b/src/decode.c

@@ -1299,6 +1299,7 @@

         // reconstruction

         if (f->frame_thread.pass == 1) {

             f->bd_fn.read_coef_blocks(t, bs, b);

+            b->filter2d = FILTER_2D_BILINEAR;

         } else {

             if (f->bd_fn.recon_b_inter(t, bs, b)) return -1;

         }