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avcodec/pngdec: Use ff_set_dimensions()

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Fixes OOM
Fixes: 1314/clusterfuzz-testcase-minimized-4621997222920192

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 a0296fc056f0d86943c697c505a181744b07dd45)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-04 18:40:46 +02:00
parent dfda395b2f
commit 142c65ba9c
1 changed files with 3 additions and 2 deletions
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5
libavcodec/pngdec.c
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@ -622,8 +622,9 @@ static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s,
}
if (!(s->pic_state & PNG_IDAT)) {
/* init image info */
avctx->width = s->width;
avctx->height = s->height;
ret = ff_set_dimensions(avctx, s->width, s->height);
if (ret < 0)
return ret;
s->channels = ff_png_get_nb_channels(s->color_type);
s->bits_per_pixel = s->bit_depth * s->channels;