ath9k: fix a null pointer deref issue

SVN-Revision: 24312

diff --git a/package/mac80211/patches/320-pending_work.patch b/package/mac80211/patches/320-pending_work.patch
index 44d8df2e0352b3fa65caf715bcd0699c2c3ad58a..38bf6fb9fb57b4f2019967dcc18dd7cc5e74ef93 100644 (file)
--- a/package/mac80211/patches/320-pending_work.patch
+++ b/package/mac80211/patches/320-pending_work.patch
@@ -2137,3 +2137,17 @@
        }
  
        /* add interfaces */
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1745,7 +1745,10 @@ int ath_tx_start(struct ieee80211_hw *hw
+       int frmlen = skb->len + FCS_LEN;
+       int q;
+ 
+-      txctl->an = (struct ath_node *)sta->drv_priv;
++      /* NOTE:  sta can be NULL according to net/mac80211.h */
++      if (sta)
++              txctl->an = (struct ath_node *)sta->drv_priv;
++
+       if (info->control.hw_key)
+               frmlen += info->control.hw_key->icv_len;
+