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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-25 01:12:15 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-31 19:51:56 +0100 |
| commit | 9cf2764389acd24c4b6411ffb886af4f9589f87c (patch) | |
| tree | 072b65540f3cad577442b4428a1d9dd5382111ec | |
| parent | 62dae886b66078ef8658c76b3c3b1bb26665cd44 (diff) | |
| download | ffmpeg-9cf2764389acd24c4b6411ffb886af4f9589f87c.tar.gz | |
avcodec/cook: Move up and extend block_align check
Fixes: signed integer overflow: 2046820356 * 8 cannot be represented in type 'int'
Fixes: 18391/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_COOK_fuzzer-5631674666188800
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 1c63edcdd208bf18a3be66e94deb6ac115f6364e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/cook.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/libavcodec/cook.c b/libavcodec/cook.c index 501d27b132..90b22ecca7 100644 --- a/libavcodec/cook.c +++ b/libavcodec/cook.c @@ -1075,6 +1075,9 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) return AVERROR_INVALIDDATA; } + if (avctx->block_align >= INT_MAX / 8) + return AVERROR(EINVAL); + /* Initialize RNG. */ av_lfg_init(&q->random_state, 0); @@ -1234,10 +1237,6 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) if ((ret = init_cook_vlc_tables(q))) return ret; - - if (avctx->block_align >= UINT_MAX / 2) - return AVERROR(EINVAL); - /* Pad the databuffer with: DECODE_BYTES_PAD1 or DECODE_BYTES_PAD2 for decode_bytes(), AV_INPUT_BUFFER_PADDING_SIZE, for the bitstreamreader. */ |