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mac80211: Fix headroom allocation when forwarding mesh pkt 

This patch fix issue introduced by my previous commit that
tried to ensure enough headroom was present, and instead
broke it.

When forwarding mesh pkt, mac80211 may also add security header,
and it must therefore be taken into account in the needed headroom.

Fixes: d8da0b5d64 ("mac80211: Ensure enough headroom when forwarding mesh pkt")
Signed-off-by: Cedric Izoard <cedric.izoard@ceva-dsp.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Cedric Izoard 2017-01-11 14:39:07 +00:00 committed by Johannes Berg
parent eeb0d56fab
commit c38c39bf7c
1 changed files with 2 additions and 1 deletions
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3
net/mac80211/rx.c
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@ -2472,7 +2472,8 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
if (!ifmsh->mshcfg.dot11MeshForwarding)
goto out;
fwd_skb = skb_copy_expand(skb, local->tx_headroom, 0, GFP_ATOMIC);
fwd_skb = skb_copy_expand(skb, local->tx_headroom +
sdata->encrypt_headroom, 0, GFP_ATOMIC);
if (!fwd_skb) {
net_info_ratelimited("%s: failed to clone mesh frame\n",
sdata->name);