From c6944765e839e6d22df279c8d7cc02a5afe82050 Mon Sep 17 00:00:00 2001
From: Mikhail Efremov <sem@altlinux.org>
Date: Thu, 25 Dec 2014 17:52:36 +0300
Subject: [PATCH] Check VLAN interface name.

---
 alterator-net-eth/backend3/net-eth | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/alterator-net-eth/backend3/net-eth b/alterator-net-eth/backend3/net-eth
index ed9f8b0..68cb41d 100755
--- a/alterator-net-eth/backend3/net-eth
+++ b/alterator-net-eth/backend3/net-eth
@@ -1080,6 +1080,18 @@ vlan_edit() {
   write_iface_option "$cachedir/$new" "VID" "$vid"
 }
 
+check_vlan()
+{
+  local name="$1"; shift
+
+  [ -n "$name" ] || return 1
+
+  if echo "$name" | grep -qs '^[[:alnum:]]$'; then
+      return 0
+  fi
+
+  return 1
+}
 
 # ADD NEW VLAN FOR SELECTED INTERFACE
 vlan_add_new() {
@@ -1095,7 +1107,8 @@ vlan_add_new() {
     return
   fi
 
-  if [ -z "$name" ]; then
+  if ! check_vlan "$name"; then
+    write_error "`_ "Invalid VLAN name: $name"`"
     return
   fi