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Added check for total arguments size for variadic functions.

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This commit is contained in:
acqn 2023-09-18 16:44:04 +08:00
parent 12193790e5
commit 51e304f10f
2 changed files with 17 additions and 0 deletions
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4
src/cc65/expr.c
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@ -1035,6 +1035,10 @@ static void FunctionCall (ExprDesc* Expr)
/* Parse the argument list and pass them to the called function */ /* Parse the argument list and pass them to the called function */
ArgSize = FunctionArgList (Func, IsFastcall, Expr); ArgSize = FunctionArgList (Func, IsFastcall, Expr);
if (ArgSize > 0xFF && (Func->Flags & FD_VARIADIC) != 0) {
Error ("Total size of all arguments passed to a variadic function cannot exceed 255 bytes");
}
/* We need the closing paren here */ /* We need the closing paren here */
ConsumeRParen (); ConsumeRParen ();

13
test/err/bug2144.c Normal file
View File

@ -0,0 +1,13 @@
/* Bug #2144 - Maximum parameter size is not checked for variadic functions */
void a(...) {}
void b()
{
/* Argument size > 255 */
a(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L);
}