llvm-undname: Fix nullptr deref on invalid structor names in template args
Similar to r358421: A StructorIndentifierNode has a Class field which
is read when printing it, but if the StructorIndentifierNode appears in
a template argument then demangleFullyQualifiedSymbolName() which sets
Class isn't called. Since StructorIndentifierNodes are always leaf
names, we can just reject them as well.
Found by oss-fuzz.
llvm-svn: 358491
diff --git a/llvm/lib/Demangle/MicrosoftDemangle.cpp b/llvm/lib/Demangle/MicrosoftDemangle.cpp
index c3bdfa2..49cfcde 100644
--- a/llvm/lib/Demangle/MicrosoftDemangle.cpp
+++ b/llvm/lib/Demangle/MicrosoftDemangle.cpp
@@ -949,9 +949,10 @@
if (NBB & NBB_Template) {
// NBB_Template is only set for types and non-leaf names ("a::" in "a::b").
- // A conversion operator only makes sense in a leaf name , so reject it in
- // NBB_Template contexts.
- if (Identifier->kind() == NodeKind::ConversionOperatorIdentifier) {
+ // Structors and conversion operators only makes sense in a leaf name, so
+ // reject them in NBB_Template contexts.
+ if (Identifier->kind() == NodeKind::ConversionOperatorIdentifier ||
+ Identifier->kind() == NodeKind::StructorIdentifier) {
Error = true;
return nullptr;
}