From 7ac476ca0cfa0e0e740a75f3221797ce2d1084c7 Mon Sep 17 00:00:00 2001
From: Juliusz Chroboczek <jch@irif.fr>
Date: Sun, 8 Jun 2025 19:30:23 +0200
Subject: [PATCH] Don't crash on short RTP packet.

---
 rtp/rtp.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/rtp/rtp.go b/rtp/rtp.go
index d5ca0fd..c80b240 100755
--- a/rtp/rtp.go
+++ b/rtp/rtp.go
@@ -44,6 +44,7 @@ const (
 
 var (
 	ErrBadVersion                  = errors.New("bad rtp version header")
+	ErrTruncatedPacket             = errors.New("truncated rtp packet")
 	ErrExtendedHeadersNotSupported = errors.New("rtp extended headers not supported")
 )
 
@@ -135,6 +136,9 @@ func (h *Header) Write(b []byte) []byte {
 
 // Read extracts an RTP header from a byte slice.
 func (h *Header) Read(b []byte) error {
+	if len(b) < 12 {
+		return ErrTruncatedPacket
+	}
 	if b[0]>>6 != Version {
 		return ErrBadVersion
 	} else if (b[0]>>4)&1 != 0 {