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| author | Caolán McNamara <caolanm@redhat.com> | 2018-02-07 21:10:16 +0000 |
|---|---|---|
| committer | Caolán McNamara <caolanm@redhat.com> | 2018-02-09 10:15:56 +0000 |
| commit | 75a171a405afd6eac236af93aa9d29a9c3ec9c64 (patch) | |
| tree | 7c2c04c0e0228445c24f730bf87a2399647ff398 | |
| parent | ae73c3ff112e1ed38eb4678ac5745990661a2e66 (diff) | |
check ntables offset
Change-Id: Id75f5f4b578fd176c17e5763569f1403260c6594
| -rw-r--r-- | vcl/source/fontsubset/sft.cxx | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/vcl/source/fontsubset/sft.cxx b/vcl/source/fontsubset/sft.cxx index 474d07ba4266..64beb34b28b1 100644 --- a/vcl/source/fontsubset/sft.cxx +++ b/vcl/source/fontsubset/sft.cxx @@ -1482,8 +1482,11 @@ static int doOpenTTFont( sal_uInt32 facenum, TrueTypeFont* t ) return SF_TTFORMAT; } - t->ntables = GetUInt16(t->ptr + tdoffset, 4); - if (t->ntables >= 128) { + if (tdoffset + 4 + sizeof(sal_uInt16) <= static_cast<sal_uInt32>(t->fsize)) { + t->ntables = GetUInt16(t->ptr + tdoffset, 4); + } + + if (t->ntables >= 128 || t->ntables == 0) { CloseTTFont(t); return SF_TTFORMAT; } |