From a2e5bcedb29ba8d1a6a99bf9810713e4f2e79e90 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 7 Jun 2024 01:50:00 +0200
Subject: [PATCH] avformat/rdt: Check pkt_len

Fixes: CID1473553 Untrusted loop bound

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
---
 libavformat/rdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/rdt.c b/libavformat/rdt.c
index 60449d256a..2fa53d34a8 100644
--- a/libavformat/rdt.c
+++ b/libavformat/rdt.c
@@ -206,6 +206,8 @@ ff_rdt_parse_header(const uint8_t *buf, int len,
             return -1; /* not followed by a data packet */
 
         pkt_len = AV_RB16(buf+3);
+        if (pkt_len > len)
+            return AVERROR_INVALIDDATA;
         buf += pkt_len;
         len -= pkt_len;
         consumed += pkt_len;