[FFmpeg-devel] [PATCH 2/3] avformat/lafdec: Check if all data was read

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/3] avformat/lafdec: Check if all data was read
Date: Tue, 31 Jan 2023 00:45:26 +0100
Message-ID: <20230130234527.13149-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20230130234527.13149-1-michael@niedermayer.cc>

Fixes: OOM
Fixes: 54572/clusterfuzz-testcase-minimized-ffmpeg_dem_LAF_fuzzer-4974038870523904

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/lafdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/lafdec.c b/libavformat/lafdec.c
index d02b479c4d..b78ec3649c 100644
--- a/libavformat/lafdec.c
+++ b/libavformat/lafdec.c
@@ -208,6 +208,8 @@ again:
         ret = avio_read(pb, s->data, st_count * st->codecpar->sample_rate * bpp);
         if (ret < 0)
             return ret;
+        if (ret != st_count * st->codecpar->sample_rate * bpp)
+            return AVERROR_INVALIDDATA;
     }
 
     st = ctx->streams[s->index];
-- 
2.17.1

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