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mac80211: fix wiphy supported_band access

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Fix wiphy supported_band access in tx radiotap parsing introduced
in commit 5ec3aed9ba4c ("mac80211: Parse legacy and HT rate in
injected frames"). In particular, info->band is always set to 0
(IEEE80211_BAND_2GHZ) since it has not assigned yet.
This cause a kernel crash on 5GHz only devices.
Move ieee80211_parse_tx_radiotap() after info->band assignment

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Lorenzo Bianconi 2016-02-19 12:18:01 +01:00 • committed by Johannes Berg
commit 109843b07a
1 changed files with 5 additions and 4 deletions
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9
net/mac80211/tx.c
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@ -1892,10 +1892,6 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
IEEE80211_TX_CTL_INJECTED;
/* process and remove the injection radiotap header */
if (!ieee80211_parse_tx_radiotap(local, skb))
goto fail;
rcu_read_lock();
/*
@ -1957,6 +1953,11 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
goto fail_rcu;
info->band = chandef->chan->band;
/* process and remove the injection radiotap header */
if (!ieee80211_parse_tx_radiotap(local, skb))
goto fail_rcu;
ieee80211_xmit(sdata, NULL, skb);
rcu_read_unlock();