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net: vrf: do not allow table id 0
Frank reported that vrf devices can be created with a table id of 0.
This breaks many of the run time table id checks and should not be
allowed. Detect this condition at create time and fail with EINVAL.
Fixes: 193125dbd8
("net: Introduce VRF device driver")
Reported-by: Frank Kellermann <frank.kellermann@atos.net>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 2 additions and 0 deletions
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@ -1252,6 +1252,8 @@ static int vrf_newlink(struct net *src_net, struct net_device *dev,
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return -EINVAL;
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return -EINVAL;
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vrf->tb_id = nla_get_u32(data[IFLA_VRF_TABLE]);
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vrf->tb_id = nla_get_u32(data[IFLA_VRF_TABLE]);
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if (vrf->tb_id == RT_TABLE_UNSPEC)
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return -EINVAL;
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dev->priv_flags |= IFF_L3MDEV_MASTER;
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dev->priv_flags |= IFF_L3MDEV_MASTER;
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