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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-06 16:28:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-10 01:52:56 +0200 |
| commit | 270a7ff111aa95793ba156b797f1d1e4caaa7efd (patch) | |
| tree | 0b3fbd5be4320398ef7ec8e940e5cdc7874799b0 | |
| parent | a80b8a01cc934b3417cea5c50a9f607d77f223ec (diff) | |
| download | ffmpeg-270a7ff111aa95793ba156b797f1d1e4caaa7efd.tar.gz | |
avcodec/mjpegdec: Check for odd progressive RGB
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>
| -rw-r--r-- | libavcodec/mjpegdec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 8f6fa35233..14896cb1ab 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -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)); |