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avcodec/cngdec: Fix integer clipping

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Fixes: runtime error: value -36211.7 is outside the range of representable values of type 'short'
Fixes: 2992/clusterfuzz-testcase-6649611793989632

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 51090133b3)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-02 18:34:09 +01:00
parent b45971a955
commit b9e9c5cee0
1 changed files with 1 additions and 1 deletions
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libavcodec/cngdec.c
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@ -147,7 +147,7 @@ static int cng_decode_frame(AVCodecContext *avctx, void *data,
return ret;
buf_out = (int16_t *)frame->data[0];
for (i = 0; i < avctx->frame_size; i++)
buf_out[i] = p->filter_out[i + p->order];
buf_out[i] = av_clip_int16(p->filter_out[i + p->order]);
memcpy(p->filter_out, p->filter_out + avctx->frame_size,
p->order * sizeof(*p->filter_out));