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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-02 18:57:05 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-04 01:10:28 +0200 |
| commit | 652d7c6348f96181fa69f8e2afb7b27a14c0a88a (patch) | |
| tree | 38c50d5c716ec9000e99712b31cf1e3735b190b0 /libavcodec | |
| parent | 0898a3d9909960324e27d3a7a4f48c4effbb654a (diff) | |
| download | ffmpeg-652d7c6348f96181fa69f8e2afb7b27a14c0a88a.tar.gz | |
avcodec/jpeg2000dec: Fixes invalid shifts in jpeg2000_decode_packets_po_iteration()
Fixes: shift exponent 47 is too large for 32-bit type 'int'
Fixes: 9163/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5661750182543360
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 4071b5ce53..96dab8e176 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -1254,10 +1254,10 @@ static int jpeg2000_decode_packets_po_iteration(Jpeg2000DecoderContext *s, Jpeg2 if (reslevelno >= codsty->nreslevels) continue; - if (yc % (1 << (rlevel->log2_prec_height + reducedresno)) && y != tile->coord[1][0]) //FIXME this is a subset of the check + if (yc % (1LL << (rlevel->log2_prec_height + reducedresno)) && y != tile->coord[1][0]) //FIXME this is a subset of the check continue; - if (xc % (1 << (rlevel->log2_prec_width + reducedresno)) && x != tile->coord[0][0]) //FIXME this is a subset of the check + if (xc % (1LL << (rlevel->log2_prec_width + reducedresno)) && x != tile->coord[0][0]) //FIXME this is a subset of the check continue; // check if a precinct exists @@ -1325,10 +1325,10 @@ static int jpeg2000_decode_packets_po_iteration(Jpeg2000DecoderContext *s, Jpeg2 uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno; - if (yc % (1 << (rlevel->log2_prec_height + reducedresno)) && y != tile->coord[1][0]) //FIXME this is a subset of the check + if (yc % (1LL << (rlevel->log2_prec_height + reducedresno)) && y != tile->coord[1][0]) //FIXME this is a subset of the check continue; - if (xc % (1 << (rlevel->log2_prec_width + reducedresno)) && x != tile->coord[0][0]) //FIXME this is a subset of the check + if (xc % (1LL << (rlevel->log2_prec_width + reducedresno)) && x != tile->coord[0][0]) //FIXME this is a subset of the check continue; // check if a precinct exists |