[FFmpeg-cvslog] avformat/qcp: Check for read failure in header

[Michael Niedermayer]

ffmpeg | branch: release/7.1 | Michael Niedermayer <michael at niedermayer.cc> | Mon Sep 23 20:55:17 2024 +0200| [9285b93143530f36a96ce1d855d51a5c54d868c9] | committer: Michael Niedermayer

avformat/qcp: Check for read failure in header

Fixes: Use of uninitialized value
Fixes: 71551/clusterfuzz-testcase-minimized-ffmpeg_dem_QCP_fuzzer-4647386712965120

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit f52b9d05837c23b0c55013551bc28dce4922de0b)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9285b93143530f36a96ce1d855d51a5c54d868c9
---

 libavformat/qcp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/qcp.c b/libavformat/qcp.c
index fdf18618d2..13a479a11e 100644
--- a/libavformat/qcp.c
+++ b/libavformat/qcp.c
@@ -105,7 +105,8 @@ static int qcp_read_header(AVFormatContext *s)
 
     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     st->codecpar->ch_layout  = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
-    avio_read(pb, buf, 16);
+    if (avio_read(pb, buf, 16) != 16)
+        return AVERROR_INVALIDDATA;
     if (is_qcelp_13k_guid(buf)) {
         st->codecpar->codec_id = AV_CODEC_ID_QCELP;
     } else if (!memcmp(buf, guid_evrc, 16)) {