netdev - [PATCH] bonding: Allow tun-interfaces as slaves

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 8 Aug 2016 14:48:12 -0700
From:	Jörn Engel <joern@...estorage.com>
To:	dingtianhong <dingtianhong@...wei.com>,
	Jay Vosburgh <fubar@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>
Cc:	Andy Gospodarek <andy@...yhouse.net>, netdev@...r.kernel.org
Subject: [PATCH] bonding: Allow tun-interfaces as slaves

Up until 00503b6f702e (part of 3.14-rc1), the bonding driver could be
used to enslave tun-interfaces.  00503b6f702e broke that behaviour,
afaics as an unintended side-effect.

For the purpose of bond-over-tun in balance-rr mode, simply ignoring the
error from dev_set_mac_address() is good enough.  I am not familiar
enough with the code to judge what new problems this patch might
introduce.

Signed-off-by: Joern Engel <joern@...estorage.com>
---
 drivers/net/bonding/bond_main.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 1f276fa30ba6..bc5dba847f50 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1489,11 +1489,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 		 */
 		memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
 		addr.sa_family = slave_dev->type;
-		res = dev_set_mac_address(slave_dev, &addr);
-		if (res) {
-			netdev_dbg(bond_dev, "Error %d calling set_mac_address\n", res);
-			goto err_restore_mtu;
-		}
+		dev_set_mac_address(slave_dev, &addr);
 	}
 
 	/* set slave flag before open to prevent IPv6 addrconf */
@@ -1777,7 +1773,6 @@ err_restore_mac:
 		dev_set_mac_address(slave_dev, &addr);
 	}
 
-err_restore_mtu:
 	dev_set_mtu(slave_dev, new_slave->original_mtu);
 
 err_free:
-- 
2.1.4