From 070afae9d3bf73dd3a4eaf8c04a9a44ff51ebfda Mon Sep 17 00:00:00 2001
From: Patrick McClurg <patrick.mcclurg@protocol.ai>
Date: Tue, 9 Jan 2024 19:11:57 +0100
Subject: [PATCH] fixed panic identified in fuzzing

---
 internal/dkg/actions_passive.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/dkg/actions_passive.go b/internal/dkg/actions_passive.go
index 61940daf3..ec4e12384 100644
--- a/internal/dkg/actions_passive.go
+++ b/internal/dkg/actions_passive.go
@@ -29,6 +29,9 @@ func (d *Process) Packet(ctx context.Context, packet *drand.GossipPacket) (*dran
 
 	packetName := packetName(packet)
 	packetSig := hex.EncodeToString(packet.Metadata.Signature)
+	if len(packetSig) < 8 {
+		return nil, errors.New("packet signature is too short")
+	}
 	shortSig := packetSig[0:8]
 	d.log.Debugw("processing DKG gossip packet", "type", packetName, "sig", shortSig)
 	_, span := tracer.NewSpan(ctx, fmt.Sprintf("packet.%s", packetName))