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| author | Mark Smith <lk-netdev@lk-netdev.nosense.org> | 2009-08-06 23:21:22 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-08-12 20:44:50 -0700 |
| commit | 6885ffb3a1b4abf731fd0891a2c1544a83c2651d (patch) | |
| tree | 20d18c7787dca4100243b122d8485fbbb76215eb /net/appletalk | |
| parent | b91cd1440870f7a0649e570498b7b93caf9f781c (diff) | |
| download | lwn-6885ffb3a1b4abf731fd0891a2c1544a83c2651d.tar.gz lwn-6885ffb3a1b4abf731fd0891a2c1544a83c2651d.zip | |
Use correct NET_RX_* returns for atalk_rcv()
In all rx'd SKB cases, atalk_rcv() either eventually jumps to or falls through
to the label out:, which returns numeric 0. Numeric 0 corresponds to
NET_RX_SUCCESS, which is incorrect in failed SKB cases.
This patch makes atalk_rcv() provide the correct returns by:
o explicitly returning NET_RX_SUCCESS in the two success cases
o having the out: label return NET_RX_DROP, instead of numeric 0
o making the failed SKB labels and processing more consistent with other
_rcv() routines in the kernel, simplifying validation and removing a
backwards goto
Signed-off-by: Mark Smith <markzzzsmith@yahoo.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/appletalk')
| -rw-r--r-- | net/appletalk/ddp.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c index 875eda5dbad7..0d42d5da50ad 100644 --- a/net/appletalk/ddp.c +++ b/net/appletalk/ddp.c @@ -1400,7 +1400,7 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, __u16 len_hops; if (!net_eq(dev_net(dev), &init_net)) - goto freeit; + goto drop; /* Don't mangle buffer if shared */ if (!(skb = skb_share_check(skb, GFP_ATOMIC))) @@ -1408,7 +1408,7 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, /* Size check and make sure header is contiguous */ if (!pskb_may_pull(skb, sizeof(*ddp))) - goto freeit; + goto drop; ddp = ddp_hdr(skb); @@ -1426,7 +1426,7 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, if (skb->len < sizeof(*ddp) || skb->len < (len_hops & 1023)) { pr_debug("AppleTalk: dropping corrupted frame (deh_len=%u, " "skb->len=%u)\n", len_hops & 1023, skb->len); - goto freeit; + goto drop; } /* @@ -1436,7 +1436,7 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, if (ddp->deh_sum && atalk_checksum(skb, len_hops & 1023) != ddp->deh_sum) /* Not a valid AppleTalk frame - dustbin time */ - goto freeit; + goto drop; /* Check the packet is aimed at us */ if (!ddp->deh_dnet) /* Net 0 is 'this network' */ @@ -1449,7 +1449,7 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, * AppleTalk iface */ atalk_route_packet(skb, dev, ddp, len_hops, origlen); - goto out; + return NET_RX_SUCCESS; } /* if IP over DDP is not selected this code will be optimized out */ @@ -1465,18 +1465,21 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, sock = atalk_search_socket(&tosat, atif); if (!sock) /* But not one of our sockets */ - goto freeit; + goto drop; /* Queue packet (standard) */ skb->sk = sock; if (sock_queue_rcv_skb(sock, skb) < 0) - goto freeit; -out: - return 0; -freeit: + goto drop; + + return NET_RX_SUCCESS; + +drop: kfree_skb(skb); - goto out; +out: + return NET_RX_DROP; + } /* |