OSV-2020-249 Heap-buffer-overflow in cipher_generic_initiv

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19926 Crash type: Heap-buffer-overflow READ 16 Crash state: ciphergenericinitiv ciphergenericinitinternal cryptofuzz::module::OpenSSL::OpSymmetricDecryptEVP...