diff options
| author | Even Rouault <even.rouault@spatialys.com> | 2017-09-01 10:26:18 +0200 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2017-09-01 10:26:18 +0200 |
| commit | 6ce49bf5aebb3c45c464fa82d14cfd4bf7026a28 (patch) | |
| tree | 8bf785fb83b0d925fab66867b2321eef87976d3a /src/lib | |
| parent | 04b70908a7ada29481d2e1903b76f44a68d4d268 (diff) | |
Fix undefined shift behaviour in opj_dwt_is_whole_tile_decoding(). Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3255. Credit to OSS Fuzz
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/openjp2/dwt.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/lib/openjp2/dwt.c b/src/lib/openjp2/dwt.c index ee0b5b22..7377b642 100644 --- a/src/lib/openjp2/dwt.c +++ b/src/lib/openjp2/dwt.c @@ -1218,13 +1218,14 @@ static OPJ_BOOL opj_dwt_is_whole_tile_decoding(opj_tcd_t *p_tcd, /* Tolerate small margin within the reduced resolution factor to consider if */ /* the whole tile path must be taken */ return (tcx0 >= (OPJ_UINT32)tilec->x0 && - ((tcx0 - (OPJ_UINT32)tilec->x0) >> shift) == 0 && tcy0 >= (OPJ_UINT32)tilec->y0 && - ((tcy0 - (OPJ_UINT32)tilec->y0) >> shift) == 0 && tcx1 <= (OPJ_UINT32)tilec->x1 && - (((OPJ_UINT32)tilec->x1 - tcx1) >> shift) == 0 && tcy1 <= (OPJ_UINT32)tilec->y1 && - (((OPJ_UINT32)tilec->y1 - tcy1) >> shift) == 0); + (shift >= 32 || + (((tcx0 - (OPJ_UINT32)tilec->x0) >> shift) == 0 && + ((tcy0 - (OPJ_UINT32)tilec->y0) >> shift) == 0 && + (((OPJ_UINT32)tilec->x1 - tcx1) >> shift) == 0 && + (((OPJ_UINT32)tilec->y1 - tcy1) >> shift) == 0))); } /* <summary> */ |