This is a note to let you know that I've just added the patch titled bridge: netlink: check vlan_default_pvid range to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bridge-netlink-check-vlan_default_pvid-range.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed May 31 09:13:34 JST 2017 From: Tobias Jungel <tobias.jungel@xxxxxxxx> Date: Wed, 17 May 2017 09:29:12 +0200 Subject: bridge: netlink: check vlan_default_pvid range From: Tobias Jungel <tobias.jungel@xxxxxxxx> [ Upstream commit a285860211bf257b0e6d522dac6006794be348af ] Currently it is allowed to set the default pvid of a bridge to a value above VLAN_VID_MASK (0xfff). This patch adds a check to br_validate and returns -EINVAL in case the pvid is out of bounds. Reproduce by calling: [root@test ~]# ip l a type bridge [root@test ~]# ip l a type dummy [root@test ~]# ip l s bridge0 type bridge vlan_filtering 1 [root@test ~]# ip l s bridge0 type bridge vlan_default_pvid 9999 [root@test ~]# ip l s dummy0 master bridge0 [root@test ~]# bridge vlan port vlan ids bridge0 9999 PVID Egress Untagged dummy0 9999 PVID Egress Untagged Fixes: 0f963b7592ef ("bridge: netlink: add support for default_pvid") Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Tobias Jungel <tobias.jungel@xxxxxxxx> Acked-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/bridge/br_netlink.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -776,6 +776,13 @@ static int br_validate(struct nlattr *tb return -EPROTONOSUPPORT; } } + + if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { + __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); + + if (defpvid >= VLAN_VID_MASK) + return -EINVAL; + } #endif return 0; Patches currently in stable-queue which might be from tobias.jungel@xxxxxxxx are queue-4.9/bridge-netlink-check-vlan_default_pvid-range.patch