Set up Prysm for fuzz testing on Fuzzbuzz (#8789)

* Wrap beacon fuzz tests in go-fuzz compatible test functions

* Add fuzzbuzz.yaml

fuzz/block_fuzz.go

@@ -99,6 +99,12 @@ func (fakeChecker) Resync() error {
 	return nil
 }
 
+// FuzzBlock wraps BeaconFuzzBlock in a go-fuzz compatible interface
+func FuzzBlock(b []byte) int {
+	BeaconFuzzBlock(b)
+	return 0
+}
+
 // BeaconFuzzBlock runs full processing of beacon block against a given state.
 func BeaconFuzzBlock(b []byte) {
 	params.UseMainnetConfig()

fuzz/rpc_status_fuzz.go

@@ -62,6 +62,12 @@ func init() {
 	})
 }
 
+// FuzzP2PRPCStatus wraps BeaconFuzzP2PRPCStatus in a go-fuzz compatible interface
+func FuzzP2PRPCStatus(b []byte) int {
+	BeaconFuzzP2PRPCStatus(b)
+	return 0
+}
+
 // BeaconFuzzP2PRPCStatus implements libfuzzer and beacon fuzz interface.
 func BeaconFuzzP2PRPCStatus(b []byte) {
 	s, err := h.NewStream(context.Background(), p.PeerID(), "/eth2/beacon_chain/req/status/1/ssz_snappy")

fuzz/ssz_encoder_attestations_fuzz.go

@@ -10,6 +10,13 @@ import (
 
 var buf = new(bytes.Buffer)
 
+// FuzzSszEncoderAttestation wraps SszEncoderAttestationFuzz in a
+// go-fuzz compatible interface
+func FuzzSszEncoderAttestation(b []byte) int {
+	SszEncoderAttestationFuzz(b)
+	return 0
+}
+
 // SszEncoderAttestationFuzz runs network encode/decode for attestations.
 func SszEncoderAttestationFuzz(b []byte) {
 	params.UseMainnetConfig()

fuzz/state_fuzz.go

@@ -17,6 +17,12 @@ func init() {
 	})
 }
 
+// FuzzState wraps BeaconStateFuzz in a go-fuzz compatible interface
+func FuzzState(b []byte) int {
+	BeaconStateFuzz(b)
+	return 0
+}
+
 // BeaconStateFuzz --
 func BeaconStateFuzz(input []byte) {
 	params.UseMainnetConfig()

fuzzbuzz.yaml

@@ -0,0 +1,6 @@
+base:
+  language: go
+  docker_image: golang:latest
+  build_tags:
+    - libfuzzer
+    - blst_disabled