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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-05-04 19:18:25 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-05-06 21:02:04 +0200 |
| commit | 652ba72ed3124f201f98eea9bafb2232b535f549 (patch) | |
| tree | 5c2f1cf8d4ce01f495afb63a398b9c28d1138b49 /libavcodec/jpeg2000dec.c | |
| parent | a96c131eb53b00de154f4773d96a3b323ea3daed (diff) | |
| download | ffmpeg-streaming-652ba72ed3124f201f98eea9bafb2232b535f549.zip ffmpeg-streaming-652ba72ed3124f201f98eea9bafb2232b535f549.tar.gz | |
avcodec/jpeg2000dec: Fix undefined shift in the jpeg2000_decode_packets_po_iteration() CPRL case
Fixes: shift exponent 47 is too large for 32-bit type 'int'
Fixes: 7955/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6016721977606144
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/jpeg2000dec.c')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 5aa0713..12dcc5c 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -1181,10 +1181,10 @@ static int jpeg2000_decode_packets_po_iteration(Jpeg2000DecoderContext *s, Jpeg2 int xc = x / s->cdx[compno]; int yc = y / s->cdy[compno]; - 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 |
