From 8269866a5d467c8c05e770720a268e1f3cb868c0 Mon Sep 17 00:00:00 2001
From: sarthurdev <965089+sarthurdev@users.noreply.github.com>
Date: Mon, 10 Oct 2022 16:04:09 +0200
Subject: firewall: T4741: Verify zone `from` is defined before use

---
 data/templates/firewall/nftables-zone.j2 | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

(limited to 'data/templates/firewall/nftables-zone.j2')

diff --git a/data/templates/firewall/nftables-zone.j2 b/data/templates/firewall/nftables-zone.j2
index 919881e19..17ef5101d 100644
--- a/data/templates/firewall/nftables-zone.j2
+++ b/data/templates/firewall/nftables-zone.j2
@@ -39,18 +39,22 @@
 {%     if zone_conf.local_zone is vyos_defined %}
     chain VZONE_{{ zone_name }}_IN {
         iifname lo counter return
-{%         for from_zone, from_conf in zone_conf.from.items() if from_conf.firewall[fw_name] is vyos_defined %}
+{%         if zone_conf.from is vyos_defined %}
+{%             for from_zone, from_conf in zone_conf.from.items() if from_conf.firewall[fw_name] is vyos_defined %}
         iifname { {{ zone[from_zone].interface | join(",") }} } counter jump NAME{{ suffix }}_{{ from_conf.firewall[fw_name] }}
         iifname { {{ zone[from_zone].interface | join(",") }} } counter return
-{%         endfor %}
+{%             endfor %}
+{%         endif %}
         {{ zone_conf | nft_default_rule('zone_' + zone_name) }}
     }
     chain VZONE_{{ zone_name }}_OUT {
         oifname lo counter return
-{%         for from_zone, from_conf in zone_conf.from_local.items() if from_conf.firewall[fw_name] is vyos_defined %}
+{%         if zone_conf.from_local is vyos_defined %}
+{%             for from_zone, from_conf in zone_conf.from_local.items() if from_conf.firewall[fw_name] is vyos_defined %}
         oifname { {{ zone[from_zone].interface | join(",") }} } counter jump NAME{{ suffix }}_{{ from_conf.firewall[fw_name] }}
         oifname { {{ zone[from_zone].interface | join(",") }} } counter return
-{%         endfor %}
+{%             endfor %}
+{%         endif %}
         {{ zone_conf | nft_default_rule('zone_' + zone_name) }}
     }
 {%     else %}
@@ -59,12 +63,14 @@
 {%         if zone_conf.intra_zone_filtering is vyos_defined %}
         iifname { {{ zone_conf.interface | join(",") }} } counter return
 {%         endif %}
-{%         for from_zone, from_conf in zone_conf.from.items() if from_conf.firewall[fw_name] is vyos_defined %}
-{%             if zone[from_zone].local_zone is not defined %}
+{%         if zone_conf.from is vyos_defined %}
+{%             for from_zone, from_conf in zone_conf.from.items() if from_conf.firewall[fw_name] is vyos_defined %}
+{%                 if zone[from_zone].local_zone is not defined %}
         iifname { {{ zone[from_zone].interface | join(",") }} } counter jump NAME{{ suffix }}_{{ from_conf.firewall[fw_name] }}
         iifname { {{ zone[from_zone].interface | join(",") }} } counter return
-{%             endif %}
-{%         endfor %}
+{%                 endif %}
+{%             endfor %}
+{%         endif %}
         {{ zone_conf | nft_default_rule('zone_' + zone_name) }}
     }
 {%     endif %}
-- 
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