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Fix #14742 fuzzing crash (stack-overflow) in CheckNullPointer::nullPointerByDeRefAndCheck() #8693

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Fix #14742 fuzzing crash (stack-overflow) in CheckNullPointer::nullPointerByDeRefAndCheck() #8693

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974c9a9
Update tokenlist.cpp
chrchr-github Jul 3, 2026
b9bf0f7
Create 14742
chrchr-github Jul 3, 2026
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5 changes: 4 additions & 1 deletion lib/tokenlist.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1951,8 +1951,11 @@ void TokenList::validateAst(bool print) const
if (tok->str() == "?") {
if (!tok->astOperand1() || !tok->astOperand2())
throw InternalError(tok, "AST broken, ternary operator missing operand(s)", InternalError::AST);
if (tok->astOperand2()->str() != ":")
const Token* colon = tok->astOperand2();
if (colon->str() != ":")
throw InternalError(tok, "Syntax Error: AST broken, ternary operator lacks ':'.", InternalError::AST);
if ((colon->astOperand1() && !precedes(colon->astOperand1(), colon)) || !succeeds(colon->astOperand2(), colon))
throw InternalError(tok, "AST broken, ternary operator has bad operand(s)", InternalError::AST);
}

// Check for endless recursion
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1 change: 1 addition & 0 deletions test/cli/fuzz-crash_c/14742
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
i(){b?8:{}!$}
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