[FFmpeg-cvslog] avcodec/clearvideo: fix invalid shift in tile size check

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Jul 13 20:16:19 2019 +0200| [5dc94924d0fbdedba4356c21ec7de0347b8e4757] | committer: Michael Niedermayer

avcodec/clearvideo: fix invalid shift in tile size check

Fixes: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 15631/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CLEARVIDEO_fuzzer-5690110605000704

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=5dc94924d0fbdedba4356c21ec7de0347b8e4757
---

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

diff --git a/libavcodec/clearvideo.c b/libavcodec/clearvideo.c
index 82df8f3752..26cdfb2731 100644
--- a/libavcodec/clearvideo.c
+++ b/libavcodec/clearvideo.c
@@ -665,7 +665,7 @@ static av_cold int clv_decode_init(AVCodecContext *avctx)
     }
 
     c->tile_shift = av_log2(c->tile_size);
-    if (1 << c->tile_shift != c->tile_size) {
+    if (1U << c->tile_shift != c->tile_size) {
         av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size);
         return AVERROR_INVALIDDATA;
     }