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avcodec/jpeg2000dec: Skip de-quantization of empty areas

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Fixes: Timeout (26sec -> 18sec)
Fixes: 13448/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-576903098243481

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 2019-03-19 17:10:42 +01:00
parent c0ca67ba40
commit b8f53a2342
1 changed files with 2 additions and 0 deletions
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libavcodec/jpeg2000dec.c
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@ -1730,6 +1730,8 @@ static inline void tile_codeblocks(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
bandpos); bandpos);
if (ret) if (ret)
coded = 1; coded = 1;
else
continue;
x = cblk->coord[0][0] - band->coord[0][0]; x = cblk->coord[0][0] - band->coord[0][0];
y = cblk->coord[1][0] - band->coord[1][0]; y = cblk->coord[1][0] - band->coord[1][0];