check chain name length (max 28 chars)

diff --git a/PVE/Firewall.pm b/PVE/Firewall.pm
index 2c5e6b4e27408d0281a3f525a953809cf59bcc4e..be9b847d6e463e4bcc2f35abf025ec6d6163920b 100644 (file)
--- a/PVE/Firewall.pm
+++ b/PVE/Firewall.pm
@@ -258,6 +258,8 @@ sub ruleset_generate_rule {
 sub ruleset_create_chain {
     my ($ruleset, $chain) = @_;
 
+    die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
+
     die "chain '$chain' already exists\n" if $ruleset->{$chain};
 
     $ruleset->{$chain} = [];