scc

commit f071fe5eaccfa08807649ee69b8f8d7ee28a4505
parent 138e890629e9b4059e62fd6111be6ec01afb97ec
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 27 Aug 2015 21:31:13 +0200

Validate size of array declarations

Array sizes must be possitive integers.

Diffstat:
M
cc1/decl.c
 | 
11
++++++++++-

1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/cc1/decl.c b/cc1/decl.c
@@ -105,7 +105,16 @@ arydcl(struct declarators *dp)
 	}
 	expect(']');
 
-	n = (np == NULL) ? 0 : np->sym->u.i;
+	if (np != NULL) {
+		n = np->sym->u.i;
+		if (n  == 0 || n < 0) {
+			errorp("array size is not a positive number");
+			n = 1;
+		}
+	} else {
+		n = 0;
+	}
+
 	freetree(np);
 
 	push(dp, ARY, n);