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avcodec/tiertexseqv: set the fixed dimenasions, do not depend on the demuxer doing so

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Fixes: out of array access
Fixes: 1348/clusterfuzz-testcase-minimized-6195673642827776

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ce551a3925)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-05 12:48:12 +02:00
parent 133705f9e8
commit 2341bd7558
1 changed files with 5 additions and 0 deletions
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5
libavcodec/tiertexseqv.c
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@ -213,10 +213,15 @@ static int seqvideo_decode(SeqVideoContext *seq, const unsigned char *data, int
static av_cold int seqvideo_decode_init(AVCodecContext *avctx)
{
SeqVideoContext *seq = avctx->priv_data;
int ret;
seq->avctx = avctx;
avctx->pix_fmt = AV_PIX_FMT_PAL8;
ret = ff_set_dimensions(avctx, 256, 128);
if (ret < 0)
return ret;
seq->frame = av_frame_alloc();
if (!seq->frame)
return AVERROR(ENOMEM);