macvlan: validate flags

[~andy/linux] / drivers / net / macvlan.c

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index d0f9c2fd1d4fdaa06110d394411f48bb5f8874bb..16b43bf544b74dd3ee72599f56f429ca2dea8851 100644 (file)
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -739,6 +739,10 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
                        return -EADDRNOTAVAIL;
        }
 
+       if (data && data[IFLA_MACVLAN_FLAGS] &&
+           nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
+               return -EINVAL;
+
        if (data && data[IFLA_MACVLAN_MODE]) {
                switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
                case MACVLAN_MODE_PRIVATE: