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avcodec/jpeg2000dec: Check image offset

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Fixes: left shift of negative value -538967841
Fixes: 62447/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6427134337613824

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 88453250db)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-10-04 23:32:17 +02:00
parent 8ba64279ce
commit 7ffdd2be6a
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1 changed files with 5 additions and 0 deletions
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libavcodec/jpeg2000dec.c
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@ -308,6 +308,11 @@ static int get_siz(Jpeg2000DecoderContext *s)
return AVERROR_INVALIDDATA;
}
if (s->image_offset_x >= s->width || s->image_offset_y >= s->height) {
av_log(s->avctx, AV_LOG_ERROR, "image offsets outside image");
return AVERROR_INVALIDDATA;
}
if (s->reduction_factor && (s->image_offset_x || s->image_offset_y) ){
av_log(s->avctx, AV_LOG_ERROR, "reduction factor with image offsets is not fully implemented");
return AVERROR_PATCHWELCOME;