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avcodec/tiff: Check jpeg context against jpeg frame parameters

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Fixes: out of array access
Fixes: 24825/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-6326925027704832

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-08-20 01:05:35 +02:00
parent ad29f9e47c
commit b9ea493afe
1 changed files with 5 additions and 0 deletions
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5
libavcodec/tiff.c
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@ -919,6 +919,11 @@ static int dng_decode_jpeg(AVCodecContext *avctx, AVFrame *frame,
/* Copy the outputted tile's pixels from 'jpgframe' to 'frame' (final buffer) */ /* Copy the outputted tile's pixels from 'jpgframe' to 'frame' (final buffer) */
if (s->jpgframe->width != s->avctx_mjpeg->width ||
s->jpgframe->height != s->avctx_mjpeg->height ||
s->jpgframe->format != s->avctx_mjpeg->pix_fmt)
return AVERROR_INVALIDDATA;
/* See dng_blit for explanation */ /* See dng_blit for explanation */
if (s->avctx_mjpeg->width == w * 2 && if (s->avctx_mjpeg->width == w * 2 &&
s->avctx_mjpeg->height == h / 2 && s->avctx_mjpeg->height == h / 2 &&