[FFmpeg-devel] [PATCH 2/5] avformat/mpeg: Check len in mpegps_probe()

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/5] avformat/mpeg: Check len in mpegps_probe()
Date: Fri,  7 Jun 2024 02:32:12 +0200
Message-ID: <20240607003215.1723906-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20240607003215.1723906-1-michael@niedermayer.cc>

Fixes: CID1473590 Untrusted loop bound

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/mpeg.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 5556861e1c4..c3dff3e4ea2 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -76,6 +76,9 @@ static int mpegps_probe(const AVProbeData *p)
             int pes  = endpes <= i && check_pes(p->buf + i, p->buf + p->buf_size);
             int pack = check_pack_header(p->buf + i);
 
+            if (len > INT_MAX - i)
+                break;
+
             if (code == SYSTEM_HEADER_START_CODE)
                 sys++;
             else if (code == PACK_START_CODE && pack)
-- 
2.45.2

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