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avcodec/smacker: Check that the data size is a multiple of a sample vector

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Fixes out of array access
Fixes: ce19e41f0ef1e52a23edc488faecdb58/asan_heap-oob_2504e97_4202_ffa0df1baed14022b9bfd4f8ac23d0cb.smk

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-15 14:52:08 +01:00
parent 6a69a175e7
commit 4a9af07a49
1 changed files with 4 additions and 0 deletions
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4
libavcodec/smacker.c
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@ -670,6 +670,10 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
/* get output buffer */
frame->nb_samples = unp_size / (avctx->channels * (bits + 1));
if (unp_size % (avctx->channels * (bits + 1))) {
av_log(avctx, AV_LOG_ERROR, "unp_size %d is odd\n", unp_size);
return AVERROR(EINVAL);
}
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
samples = (int16_t *)frame->data[0];