awk: abort if NF set to negative value

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-28 12:16:29 +01:00 · 2018-11-28 12:16:29 +01:00 · 75a1c87357
commit 75a1c87357
parent 572dfb8e78
1 changed files with 2 additions and 0 deletions
--- a/editors/awk.c
+++ b/editors/awk.c
@ -1849,6 +1849,8 @@ static void handle_special(var *v)

 	if (v == intvar[NF]) {
 		n = (int)getvar_i(v);
+		if (n < 0)
+			syntax_error("NF set to negative value");
 		fsrealloc(n);

 		/* recalculate $0 */