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authorArnaldo Carvalho de Melo <acme@redhat.com>2009-09-11 22:35:22 +0400
committerDavid S. Miller <davem@davemloft.net>2009-09-11 23:54:23 +0400
commitffcfb8db540ff879c2a85bf7e404954281443414 (patch)
tree9b0014cd056c4283e6df924a5fe28ab54542c1d3 /net/appletalk/aarp.c
parent8ba69ba6a324b13e1190fc31e41954d190fd4f1d (diff)
downloadlinux-ffcfb8db540ff879c2a85bf7e404954281443414.tar.xz
Subject: [PATCH] appletalk: Fix skb leak when ipddp interface is not loaded
And also do a better job of returning proper NET_{RX,XMIT}_ values. Based on a patch and suggestions by Mark Smith. This fixes CVE-2009-2903 Reported-by: Mark Smith <lk-netdev@lk-netdev.nosense.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/appletalk/aarp.c')
-rw-r--r--net/appletalk/aarp.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/net/appletalk/aarp.c b/net/appletalk/aarp.c
index 89f99d3beb60..9d4adfd22757 100644
--- a/net/appletalk/aarp.c
+++ b/net/appletalk/aarp.c
@@ -599,7 +599,7 @@ int aarp_send_ddp(struct net_device *dev, struct sk_buff *skb,
/* Non ELAP we cannot do. */
if (dev->type != ARPHRD_ETHER)
- return -1;
+ goto free_it;
skb->dev = dev;
skb->protocol = htons(ETH_P_ATALK);
@@ -634,7 +634,7 @@ int aarp_send_ddp(struct net_device *dev, struct sk_buff *skb,
if (!a) {
/* Whoops slipped... good job it's an unreliable protocol 8) */
write_unlock_bh(&aarp_lock);
- return -1;
+ goto free_it;
}
/* Set up the queue */
@@ -663,15 +663,21 @@ out_unlock:
write_unlock_bh(&aarp_lock);
/* Tell the ddp layer we have taken over for this frame. */
- return 0;
+ goto sent;
sendit:
if (skb->sk)
skb->priority = skb->sk->sk_priority;
- dev_queue_xmit(skb);
+ if (dev_queue_xmit(skb))
+ goto drop;
sent:
- return 1;
+ return NET_XMIT_SUCCESS;
+free_it:
+ kfree_skb(skb);
+drop:
+ return NET_XMIT_DROP;
}
+EXPORT_SYMBOL(aarp_send_ddp);
/*
* An entry in the aarp unresolved queue has become resolved. Send