From 1e2bb45309d0cabaf2cc8be599a717b2003268f1 Mon Sep 17 00:00:00 2001
From: maharudragadhave-Druva <maharudra.gadhave@druva.com>
Date: Wed, 18 Jun 2025 20:00:07 +0530
Subject: [PATCH] Fix: [Issue-101] Panic: runtime error: slice bounds out of
 range in PacketCodec.SessionId() and SetSessionId() when receiving truncated
 SMB2 packets

---
 internal/smb2/packet.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/internal/smb2/packet.go b/internal/smb2/packet.go
index 93774d8..8ab67bc 100644
--- a/internal/smb2/packet.go
+++ b/internal/smb2/packet.go
@@ -189,10 +189,16 @@ func (p PacketCodec) SetTreeId(u uint32) {
 }
 
 func (p PacketCodec) SessionId() uint64 {
+	if len(p) < 48 {
+		return 0
+	}
 	return le.Uint64(p[40:48])
 }
 
 func (p PacketCodec) SetSessionId(u uint64) {
+	if len(p) < 48 {
+		return
+	}
 	le.PutUint64(p[40:48], u)
 }