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mac80211: fix mesh forwarding when ratelimited too 

Commit b51aff057c 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.

Cc: stable@kernel.org [2.6.27+]
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Milton Miller 2010-12-30 02:01:03 -06:00 committed by John W. Linville
parent 554d1d027b
commit 919bbad580
1 changed files with 2 additions and 2 deletions
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4
net/mac80211/rx.c
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@ -1788,11 +1788,11 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
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);