[FFmpeg-cvslog] avcodec/tta: Limit decoder to 16 channels

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Jun 28 20:02:32 2019 +0200| [17209e48e28d6c05c6fa78ec7630c368a6201fe8] | committer: Michael Niedermayer

avcodec/tta: Limit decoder to 16 channels

libtta 2.3 has a limit of 6 channels, so 16 is substantially above the "official" already

Fixes: OOM
Fixes: 15249/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TTA_fuzzer-5643988125614080

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=17209e48e28d6c05c6fa78ec7630c368a6201fe8
---

 libavcodec/tta.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/tta.c b/libavcodec/tta.c
index c7702610b6..4d27fcd555 100644
--- a/libavcodec/tta.c
+++ b/libavcodec/tta.c
@@ -163,7 +163,7 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
         s->data_length = get_bits_long(&gb, 32);
         skip_bits_long(&gb, 32); // CRC32 of header
 
-        if (s->channels == 0) {
+        if (s->channels == 0 || s->channels > 16) {
             av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
             return AVERROR_INVALIDDATA;
         } else if (avctx->sample_rate == 0) {