evaluate: disable meta set with ranges

... this will cause an assertion in netlink linearization, catch this
at eval stage instead.

before:
BUG: unknown expression type range
nft: netlink_linearize.c:908: netlink_gen_expr: Assertion `0' failed.

after:
/unknown_expr_type_range_assert:3:31-40: Error: Meta expression cannot be a range
meta mark set 0x001-3434
              ^^^^^^^^^^

Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/evaluate.c b/src/evaluate.c
index 51ae276a..131b0a0e 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -3169,6 +3169,19 @@ static int stmt_evaluate_meta(struct eval_ctx *ctx, struct stmt *stmt)
 				&stmt->meta.expr);
 	ctx->stmt_len = 0;
 
+	if (ret < 0)
+		return ret;
+
+	switch (stmt->meta.expr->etype) {
+	case EXPR_RANGE:
+		ret = expr_error(ctx->msgs, stmt->meta.expr,
+				 "Meta expression cannot be a range");
+		break;
+	default:
+		break;
+
+	}
+
 	return ret;
 }