[050/272] mac80211: fix mesh forwarding when ratelimited too

Greg KH
2011-02-16T00:19:25Z

From: Milton Miller <miltonm@bga.com>

commit 919bbad580445801c22ef6ccbe624551fee652bd upstream.

Commit b51aff057c9d0ef6c529dc25fd9f775faf7b6c63 said:

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.

Avoid the reference whenever the frame copy is unsuccessful
regardless of the debug message being suppressed or printed.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
net/mac80211/rx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1788,11 +1788,11 @@ 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);
+ if (!fwd_skb)
goto out;
- }

fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);