diff options
Diffstat (limited to 'libqpdf')
| -rw-r--r-- | libqpdf/QPDF.cc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc index 678f773e..ccbfaf7c 100644 --- a/libqpdf/QPDF.cc +++ b/libqpdf/QPDF.cc @@ -1253,6 +1253,21 @@ QPDF::readObjectAtOffset(bool try_recovery, int& objid, int& generation) { setLastObjectDescription(description, exp_objid, exp_generation); + + // Special case: if offset is 0, just return null. Some PDF + // writers, in particuar "Mac OS X 10.7.5 Quartz PDFContext", may + // store deleted objects in the xref table as "0000000000 00000 + // n", which is not correct, but it won't hurt anything for to + // ignore these. + if (offset == 0) + { + QTC::TC("qpdf", "QPDF bogus 0 offset", 0); + warn(QPDFExc(qpdf_e_damaged_pdf, this->file->getName(), + this->last_object_description, 0, + "object has offset 0")); + return QPDFObjectHandle::newNull(); + } + this->file->seek(offset, SEEK_SET); QPDFTokenizer::Token tobjid = readToken(this->file); |