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avcodec/clearvideo: fix invalid shift in tile size check

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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@niedermayer.cc>
(cherry picked from commit 5dc94924d0fbdedba4356c21ec7de0347b8e4757)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-07-13 20:16:19 +02:00
parent 2736e0875c
commit 34479be7a6
1 changed files with 1 additions and 1 deletions
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2
libavcodec/clearvideo.c
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@ -665,7 +665,7 @@ static av_cold int clv_decode_init(AVCodecContext *avctx)
} }
c->tile_shift = av_log2(c->tile_size); 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); av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size);
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
} }