OSV-2021-450 Global-buffer-overflow in coap_pdu_parse_opt

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31479 Crash type: Global-buffer-overflow WRITE 1 Crash state: coappduparseopt coappduparse...

OSV-2020-2080 Heap-buffer-overflow in coap_opt_length

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26371 Crash type: Heap-buffer-overflow READ 1 Crash state: coapoptlength coappduparseopt coappduparse...