OSV-2021-1425 Heap-buffer-overflow in fr_dns_label_to_value_box

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39689 Crash type: Heap-buffer-overflow READ 1 Crash state: frdnslabeltovaluebox decodevaluetrampoline frstructfromnetwork...