aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndy Gospodarek <andy@greyhouse.net>2010-09-10 11:43:20 +0000
committerPaul Gortmaker <paul.gortmaker@windriver.com>2011-01-06 18:07:58 -0500
commitc54851e65ebe3033f070d03cf44fcb92b8021819 (patch)
tree15dfd5e50a1c268e3466cc6084dca2bdea3aa16a
parent77a8dd404ee1eee8bb5c2a9c8b83b5df2a0624d4 (diff)
bonding: correctly process non-linear skbs
commit ab12811c89e88f2e66746790b1fe4469ccb7bdd9 upstream. It was recently brought to my attention that 802.3ad mode bonds would no longer form when using some network hardware after a driver update. After snooping around I realized that the particular hardware was using page-based skbs and found that skb->data did not contain a valid LACPDU as it was not stored there. That explained the inability to form an 802.3ad-based bond. For balance-alb mode bonds this was also an issue as ARPs would not be properly processed. This patch fixes the issue in my tests and should be applied to 2.6.36 and as far back as anyone cares to add it to stable. Thanks to Alexander Duyck <alexander.h.duyck@intel.com> and Jesse Brandeburg <jesse.brandeburg@intel.com> for the suggestions on this one. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> CC: Alexander Duyck <alexander.h.duyck@intel.com> CC: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
-rw-r--r--drivers/net/bonding/bond_3ad.c3
-rw-r--r--drivers/net/bonding/bond_alb.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 822f586d72a..0ddf4c66afe 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -2466,6 +2466,9 @@ int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct pac
if (!(dev->flags & IFF_MASTER))
goto out;
+ if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
+ goto out;
+
read_lock(&bond->lock);
slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev),
orig_dev);
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 40fdc41446c..0d42b382442 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -368,6 +368,9 @@ static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct
goto out;
}
+ if (!pskb_may_pull(skb, arp_hdr_len(bond_dev)))
+ goto out;
+
if (skb->len < sizeof(struct arp_pkt)) {
pr_debug("Packet is too small to be an ARP\n");
goto out;