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bridge: netlink: check vlan_default_pvid range
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: 0f963b7592
("bridge: netlink: add support for default_pvid")
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Tobias Jungel <tobias.jungel@bisdn.de>
Acked-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
47ab37a19a
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@ -835,6 +835,13 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[])
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return -EPROTONOSUPPORT;
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}
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}
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if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
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__u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
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if (defpvid >= VLAN_VID_MASK)
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return -EINVAL;
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}
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#endif
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return 0;
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