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avcodec/mjpegdec: Check for odd progressive RGB

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Fixes: out of array access
Fixes: 9225/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEGLS_fuzzer-5684770334834688

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 ee1e3ca5eb1ec7d34e925d129c893e33847ee0b7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-07-06 16:28:14 +02:00
parent 469503ac1d
commit 4ead5a9470
1 changed files with 4 additions and 0 deletions
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4
libavcodec/mjpegdec.c
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@ -594,6 +594,10 @@ unk_pixfmt:
av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
return AVERROR_PATCHWELCOME;
}
if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->progressive && s->avctx->pix_fmt == AV_PIX_FMT_GBRP) {
avpriv_report_missing_feature(s->avctx, "progressive for weird subsampling");
return AVERROR_PATCHWELCOME;
}
if (s->ls) {
memset(s->upscale_h, 0, sizeof(s->upscale_h));
memset(s->upscale_v, 0, sizeof(s->upscale_v));