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authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2015-07-02 15:48:17 +0300
committerDavid S. Miller <davem@davemloft.net>2015-07-02 22:19:17 +0300
commit462e1ead9296a8452499fb10cf3b51903ffe24ac (patch)
tree7b09da8f3051c6c94f0acf2a7b992b8a62a723f9 /net
parentc4555d16d9d24b4a376b87817d264e16f00d08d8 (diff)
downloadlinux-462e1ead9296a8452499fb10cf3b51903ffe24ac.tar.xz
bridge: vlan: fix usage of vlan 0 and 4095 again
Vlan ids 0 and 4095 were disallowed by commit: 8adff41c3d25 ("bridge: Don't use VID 0 and 4095 in vlan filtering") but then the check was removed when vlan ranges were introduced by: bdced7ef7838 ("bridge: support for multiple vlans and vlan ranges in setlink and dellink requests") So reintroduce the vlan range check. Before patch: [root@testvm ~]# bridge vlan add vid 0 dev eth0 master (succeeds) After Patch: [root@testvm ~]# bridge vlan add vid 0 dev eth0 master RTNETLINK answers: Invalid argument Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Fixes: bdced7ef7838 ("bridge: support for multiple vlans and vlan ranges in setlink and dellink requests") Acked-by: Toshiaki Makita <toshiaki.makita1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_netlink.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 6b67ed3831de..364bdc98bd9b 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -457,6 +457,8 @@ static int br_afspec(struct net_bridge *br,
if (nla_len(attr) != sizeof(struct bridge_vlan_info))
return -EINVAL;
vinfo = nla_data(attr);
+ if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
+ return -EINVAL;
if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
if (vinfo_start)
return -EINVAL;