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authorTom Sepez <tsepez@chromium.org>2015-02-05 10:41:08 -0800
committerTom Sepez <tsepez@chromium.org>2015-02-05 10:41:08 -0800
commit219b3dab7e184bf8742f61527e37053b04903ff0 (patch)
tree8ce24202dc2fd5a61774c947e5eecf007bea6bf9 /core/src/fpdfapi/fpdf_parser
parentdabc5d57bf473708295800a7991bc1fafdf76288 (diff)
downloadpdfium-219b3dab7e184bf8742f61527e37053b04903ff0.tar.xz
Fix segv in CPDF_DataAvail::CheckRoot() when /Root object is a string.
Handles the case of this malformed PDF without crashing. Note that to get a reproducible test case, a small fix is applied to our .py script which results in some whitespace/numbering difs across the resources (down the road, we ought to generate them on the fly in an intermediate directory). BUG=454695 R=jun_fang@foxitsoftware.com, thestig@chromium.org Review URL: https://codereview.chromium.org/895933003
Diffstat (limited to 'core/src/fpdfapi/fpdf_parser')
-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 16274088c0..4ed4c70e27 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -3390,7 +3390,12 @@ FX_BOOL CPDF_DataAvail::CheckRoot(IFX_DownloadHints* pHints)
}
return FALSE;
}
- CPDF_Reference* pRef = (CPDF_Reference*)m_pRoot->GetDict()->GetElement(FX_BSTRC("Pages"));
+ CPDF_Dictionary* pDict = m_pRoot->GetDict();
+ if (!pDict) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ CPDF_Reference* pRef = (CPDF_Reference*)pDict->GetElement(FX_BSTRC("Pages"));
if (pRef == NULL || pRef->GetType() != PDFOBJ_REFERENCE) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;