netdev - [PATCH] bonding: fix bridged bonds in 802.3ad mode

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-next>] [day] [month] [year] [list]

Date:	Thu, 21 Apr 2011 20:47:48 +0200
From:	Jiri Bohac <jbohac@...e.cz>
To:	netdev@...r.kernel.org
Cc:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Jay Vosburgh <fubar@...ibm.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	Benjamin Poirier <benjamin.poirier@...ymtl.ca>
Subject: [PATCH] bonding: fix bridged bonds in 802.3ad mode

802.3ad bonding inside a bridge is broken again. Originally fixed by
43aa1920117801fe9ae3d1fad886b62511e09bee, the bug was re-introduced by
1e253c3b8a1aeed51eef6fc366812f219b97de65.

LACP frames must not have their skb->dev changed by the bridging hook.

Signed-off-by: Jiri Bohac <jbohac@...e.cz>

--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1514,6 +1514,11 @@ static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
 		memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN);
 	}
 
+	/* prevent bridging code from mangling and forwarding LACP frames */
+	if (bond->params.mode == BOND_MODE_8023AD &&
+	    skb->protocol == htons(ETH_P_SLOW))
+		return RX_HANDLER_PASS;
+
 	return RX_HANDLER_ANOTHER;
 }
 
-- 
Jiri Bohac <jbohac@...e.cz>
SUSE Labs, SUSE CZ

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html