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-rw-r--r--xfa/fxfa/fm2js/cxfa_fmparser.cpp5
-rw-r--r--xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp20
2 files changed, 25 insertions, 0 deletions
diff --git a/xfa/fxfa/fm2js/cxfa_fmparser.cpp b/xfa/fxfa/fm2js/cxfa_fmparser.cpp
index f000066a19..20e0fa6d1c 100644
--- a/xfa/fxfa/fm2js/cxfa_fmparser.cpp
+++ b/xfa/fxfa/fm2js/cxfa_fmparser.cpp
@@ -911,6 +911,8 @@ std::unique_ptr<CXFA_FMExpression> CXFA_FMParser::ParseIfExpression() {
return nullptr;
std::unique_ptr<CXFA_FMSimpleExpression> pCondition = ParseParenExpression();
+ if (!pCondition)
+ return nullptr;
if (!CheckThenNext(TOKthen))
return nullptr;
@@ -923,6 +925,8 @@ std::unique_ptr<CXFA_FMExpression> CXFA_FMParser::ParseIfExpression() {
return nullptr;
auto elseIfCondition = ParseParenExpression();
+ if (!elseIfCondition)
+ return nullptr;
if (!CheckThenNext(TOKthen))
return nullptr;
@@ -969,6 +973,7 @@ std::unique_ptr<CXFA_FMExpression> CXFA_FMParser::ParseWhileExpression() {
std::move(pCondition),
pdfium::MakeUnique<CXFA_FMBlockExpression>(std::move(exprs)));
}
+
// For := 'for' Assignment 'upto' Accessor ('step' SimpleExpression)?
// 'do' ExpressionList 'endfor' |
// 'for' Assignment 'downto' Accessor ('step' SimpleExpression)?
diff --git a/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp b/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp
index 52de964f65..5ee27b189e 100644
--- a/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp
+++ b/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp
@@ -218,3 +218,23 @@ TEST(CXFA_FMParserTest, ParseFuncWithBadParamsList) {
ASSERT_TRUE(ast == nullptr);
EXPECT_TRUE(parser->HasError());
}
+
+TEST(CXFA_FMParserTest, ParseBadIfExpression) {
+ const wchar_t input[] = {L"if ( then"};
+
+ auto parser = pdfium::MakeUnique<CXFA_FMParser>(input);
+ std::unique_ptr<CXFA_FMAST> ast = parser->Parse();
+ ASSERT_TRUE(ast == nullptr);
+ EXPECT_TRUE(parser->HasError());
+}
+
+TEST(CXFA_FMParserTest, ParseBadElseIfExpression) {
+ const wchar_t input[] = {
+ L"if ($ ne -1) then\n"
+ L"elseif( then"};
+
+ auto parser = pdfium::MakeUnique<CXFA_FMParser>(input);
+ std::unique_ptr<CXFA_FMAST> ast = parser->Parse();
+ ASSERT_TRUE(ast == nullptr);
+ EXPECT_TRUE(parser->HasError());
+}