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Subject[PATCH] [128/139] mac80211: fix mesh forwarding
Date
2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Johannes Berg <johannes.berg@intel.com>

commit b51aff057c9d0ef6c529dc25fd9f775faf7b6c63 upstream.

Under memory pressure, the mac80211 mesh code
may helpfully print a message that it failed
to clone a mesh frame and then will proceed
to crash trying to use it anyway. Fix that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

---
net/mac80211/rx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

Index: linux-2.6.35.y/net/mac80211/rx.c
===================================================================
--- linux-2.6.35.y.orig/net/mac80211/rx.c
+++ linux-2.6.35.y/net/mac80211/rx.c
@@ -1707,9 +1707,11 @@ ieee80211_rx_h_mesh_fwding(struct ieee80

fwd_skb = skb_copy(skb, GFP_ATOMIC);

- if (!fwd_skb && net_ratelimit())
+ if (!fwd_skb && net_ratelimit()) {
printk(KERN_DEBUG "%s: failed to clone mesh frame\n",
sdata->name);
+ goto out;
+ }

fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
@@ -1747,6 +1749,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
}
}

+ out:
if (is_multicast_ether_addr(hdr->addr1) ||
sdata->dev->flags & IFF_PROMISC)
return RX_CONTINUE;

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