avformat/vqf: Check avio_read() in add_metadata()

Fixes: use of uninitialized data Fixes: 383825642/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5380168801124352 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
FFmpeg · Jan 21, 2025 · c43dbec · c43dbec
1 parent 54897da
commit c43dbec
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/libavformat/vqf.c b/libavformat/vqf.c
@@ -63,7 +63,8 @@ static void add_metadata(AVFormatContext *s, uint32_t tag,
     buf = av_malloc(len+1);
     if (!buf)
         return;
-    avio_read(s->pb, buf, len);
+    if (len != avio_read(s->pb, buf, len))
+        return;
     buf[len] = 0;
     AV_WL32(key, tag);
     av_dict_set(&s->metadata, key, buf, AV_DICT_DONT_STRDUP_VAL);