avformat/4xm: Check for duplicate track ids

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
3 years ago · dd94912479
parent 0dcd95ef8a
commit dd94912479
1 changed files with 3 additions and 0 deletions
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@ -149,6 +149,9 @@ static int parse_strk(AVFormatContext *s,
        memset(&fourxm->tracks[fourxm->track_count], 0,
               sizeof(AudioTrack) * (track + 1 - fourxm->track_count));
        fourxm->track_count = track + 1;
+    } else {
+        if (fourxm->tracks[track].bits)
+            return AVERROR_INVALIDDATA;
    }
    fourxm->tracks[track].adpcm       = AV_RL32(buf + 12);
    fourxm->tracks[track].channels    = AV_RL32(buf + 36);