[FFmpeg-cvslog] avformat/argo_brp: Check that ASF chunk header is completely read

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Aug 19 22:17:48 2024 +0200| [815d00868101956e2f1f9f8dd509c11af5a63684] | committer: Michael Niedermayer

avformat/argo_brp: Check that ASF chunk header is completely read

Fixes: Use of uninitialized value
Fixes: 71280/clusterfuzz-testcase-minimized-ffmpeg_dem_ARGO_BRP_fuzzer-4692991866896384

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=815d00868101956e2f1f9f8dd509c11af5a63684
---

 libavformat/argo_brp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavformat/argo_brp.c b/libavformat/argo_brp.c
index f88def3731..94b404b5d0 100644
--- a/libavformat/argo_brp.c
+++ b/libavformat/argo_brp.c
@@ -380,8 +380,8 @@ static int argo_brp_read_packet(AVFormatContext *s, AVPacket *pkt)
         if (blk.size < ASF_CHUNK_HEADER_SIZE)
             return AVERROR_INVALIDDATA;
 
-        if ((ret = avio_read(s->pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
-            return ret;
+        if (avio_read(s->pb, buf, ASF_CHUNK_HEADER_SIZE) != ASF_CHUNK_HEADER_SIZE)
+            return AVERROR_INVALIDDATA;
 
         ff_argo_asf_parse_chunk_header(&ckhdr, buf);