OSV-2021-897 Heap-buffer-overflow in ZSTD_decompressMultiFrame

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35537 Crash type: Heap-buffer-overflow READ Crash state: ZSTDdecompressMultiFrame ZSTDdecompressusingDDict bloscd...