libavformat/r3d.c: Fix Use-of-uninitialized-value in filename.

While reading the filename tag, it may return a EOF and we are still copying the file with uninitialized value. Signed-off-by: Michael Niedermayer <[email protected]>
lgeek · Aug 20, 2020 · 36f7b83 · 36f7b83
1 parent a606e3b
commit 36f7b83
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/libavformat/r3d.c b/libavformat/r3d.c
@@ -56,6 +56,7 @@ static int r3d_read_red1(AVFormatContext *s)
     R3DContext *r3d = s->priv_data;
     char filename[258];
     int tmp;
+    int ret;
     int av_unused tmp2;
     AVRational framerate;
 
@@ -97,7 +98,9 @@ static int r3d_read_red1(AVFormatContext *s)
     r3d->audio_channels = avio_r8(s->pb); // audio channels
     av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
 
-    avio_read(s->pb, filename, 257);
+    ret = avio_read(s->pb, filename, 257);
+    if (ret < 257)
+        return ret < 0 ? ret : AVERROR_EOF;
     filename[sizeof(filename)-1] = 0;
     av_dict_set(&st->metadata, "filename", filename, 0);