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bridge: vlan: enforce no pvid flag in vlan ranges

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Currently it's possible for someone to send a vlan range to the kernel
with the pvid flag set which will result in the pvid bouncing from a
vlan to vlan and isn't correct, it also introduces problems for hardware
where it doesn't make sense having more than 1 pvid. iproute2 already
enforces this, so let's enforce it on kernel-side as well.

Reported-by: Elad Raz <[email protected]>
Signed-off-by: Nikolay Aleksandrov <[email protected]>
Acked-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Nikolay Aleksandrov authored and David S. Miller committed 2015-10-12 19:59:15 -07:00
1 parent cbb41b91e6
commit 6623c60dc2
1 file changed
+3
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net/bridge/br_netlink.c
+3
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@@ -524,6 +524,9 @@ static int br_afspec(struct net_bridge *br,
if (vinfo_start)
return -EINVAL;
vinfo_start = vinfo;
/* don't allow range of pvids */
if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
return -EINVAL;
continue;
}