From 1d03ab5267bdbc7c0bcb041efaad42a462fdeb5f Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Thu, 11 Jan 2024 18:14:15 +0100
Subject: [PATCH] evaluate: tproxy: move range error checks after arg
 evaluation

Testing for range before evaluation will still crash us later during
netlink linearization, prefixes turn into ranges, symbolic expression
might hide a range/prefix.

So move this after the argument has been evaluated.

Signed-off-by: Florian Westphal <fw@strlen.de>
---
 src/evaluate.c                                   | 12 ++++++------
 tests/shell/testcases/bogons/nft-f/tproxy_ranges |  8 ++++++++
 2 files changed, 14 insertions(+), 6 deletions(-)
 create mode 100644 tests/shell/testcases/bogons/nft-f/tproxy_ranges

diff --git a/src/evaluate.c b/src/evaluate.c
index 197c82c2..d11bed01 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -4132,22 +4132,22 @@ static int stmt_evaluate_tproxy(struct eval_ctx *ctx, struct stmt *stmt)
 		return err;
 
 	if (stmt->tproxy.addr != NULL) {
-		if (stmt->tproxy.addr->etype == EXPR_RANGE)
-			return stmt_error(ctx, stmt, "Address ranges are not supported for tproxy.");
-
 		err = stmt_evaluate_addr(ctx, stmt, &stmt->tproxy.family,
 					 &stmt->tproxy.addr);
-
 		if (err < 0)
 			return err;
+
+		if (stmt->tproxy.addr->etype == EXPR_RANGE)
+			return stmt_error(ctx, stmt, "Address ranges are not supported for tproxy.");
 	}
 
 	if (stmt->tproxy.port != NULL) {
-		if (stmt->tproxy.port->etype == EXPR_RANGE)
-			return stmt_error(ctx, stmt, "Port ranges are not supported for tproxy.");
 		err = nat_evaluate_transport(ctx, stmt, &stmt->tproxy.port);
 		if (err < 0)
 			return err;
+
+		if (stmt->tproxy.port->etype == EXPR_RANGE)
+			return stmt_error(ctx, stmt, "Port ranges are not supported for tproxy.");
 	}
 
 	return 0;
diff --git a/tests/shell/testcases/bogons/nft-f/tproxy_ranges b/tests/shell/testcases/bogons/nft-f/tproxy_ranges
new file mode 100644
index 00000000..1230860e
--- /dev/null
+++ b/tests/shell/testcases/bogons/nft-f/tproxy_ranges
@@ -0,0 +1,8 @@
+define range = 42-80
+
+table t {
+	chain c {
+		tcp dport 42 tproxy to 192.168.0.1:$range
+		tcp dport 42 tproxy to 192.168.0.0/16
+	}
+}
-- 
2.33.0