[FFmpeg-cvslog] avcodec/ra288: Check block_align for the assumed value

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Oct 29 18:46:34 2019 +0100| [b6abdb1faf810e93189797a61af124fcd05269d4] | committer: Michael Niedermayer

avcodec/ra288: Check block_align for the assumed value

Fixes: Timeout (224sec -> 1ms)
Fixes: 18408/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RA_288_fuzzer-5740382570151936

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=b6abdb1faf810e93189797a61af124fcd05269d4
---

 libavcodec/ra288.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ra288.c b/libavcodec/ra288.c
index f1b3c8eab5..aa4bd5d90f 100644
--- a/libavcodec/ra288.c
+++ b/libavcodec/ra288.c
@@ -77,7 +77,7 @@ static av_cold int ra288_decode_init(AVCodecContext *avctx)
     avctx->channel_layout = AV_CH_LAYOUT_MONO;
     avctx->sample_fmt     = AV_SAMPLE_FMT_FLT;
 
-    if (avctx->block_align <= 0) {
+    if (avctx->block_align != 38) {
         av_log(avctx, AV_LOG_ERROR, "unsupported block align\n");
         return AVERROR_PATCHWELCOME;
     }