Patch "net: vrf: do not allow table id 0" has been added to the 4.4-stable tree

Patch "net: vrf: do not allow table id 0" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net: vrf: do not allow table id 0

to the 4.4-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:
     net-vrf-do-not-allow-table-id-0.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Jan 12 21:36:14 CET 2017
From: David Ahern <dsa@cumulusnetworks.com>
Date: Tue, 10 Jan 2017 15:22:25 -0800
Subject: net: vrf: do not allow table id 0

From: David Ahern <dsa@cumulusnetworks.com>


[ Upstream commit 24c63bbc18e25d5d8439422aa5fd2d66390b88eb ]

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: 193125dbd8eb ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/vrf.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -925,6 +925,8 @@ static int vrf_newlink(struct net *src_n
 		return -EINVAL;
 
 	vrf->tb_id = nla_get_u32(data[IFLA_VRF_TABLE]);
+	if (vrf->tb_id == RT_TABLE_UNSPEC)
+		return -EINVAL;
 
 	dev->priv_flags |= IFF_L3MDEV_MASTER;
 


Patches currently in stable-queue which might be from dsa@cumulusnetworks.com are

queue-4.4/net-vrf-drop-conntrack-data-after-pass-through-vrf-device-on-tx.patch
queue-4.4/net-ipv4-fix-multipath-selection-with-vrf.patch
queue-4.4/net-vrf-do-not-allow-table-id-0.patch