diff options
| author | Yogesh Ashok Powar <yogeshp@marvell.com> | 2011-07-13 16:12:06 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-07-15 21:38:30 +0400 |
| commit | 16c929df0895e6f52f4a0f17683d709f5fef95d8 (patch) | |
| tree | b0dfdbf0e252ddef7ab480233ce8842c0e7867a1 /drivers/net/wireless/mwl8k.c | |
| parent | 5a865bad44984de245d20bfb7cff99993e8e8294 (diff) | |
| download | linux-16c929df0895e6f52f4a0f17683d709f5fef95d8.tar.xz | |
mwl8k: Fixing sta dereference when ieee80211_tx_info->control.sta is NULL
Following oops was seen on SMP machine
>BUG: unable to handle kernel NULL pointer dereference at 00000012
>IP: [<f8c56691>] mwl8k_tx+0x20e/0x561 [mwl8k]
>*pde = 00000000
>Oops: 0000 [#1] SMP
>Modules linked in: mwl8k mac80211 cfg80211 [last unloaded: cfg80211]
As ieee80211_tx_info->control.sta may be NULL during ->tx call, avoiding sta
dereference in such scenario with the following patch.
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/mwl8k.c')
| -rw-r--r-- | drivers/net/wireless/mwl8k.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c index aeac3cc4dbe4..a09b94509f04 100644 --- a/drivers/net/wireless/mwl8k.c +++ b/drivers/net/wireless/mwl8k.c @@ -1891,9 +1891,9 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb) txpriority = index; - if (ieee80211_is_data_qos(wh->frame_control) && - skb->protocol != cpu_to_be16(ETH_P_PAE) && - sta->ht_cap.ht_supported && priv->ap_fw) { + if (priv->ap_fw && sta && sta->ht_cap.ht_supported + && skb->protocol != cpu_to_be16(ETH_P_PAE) + && ieee80211_is_data_qos(wh->frame_control)) { tid = qos & 0xf; mwl8k_tx_count_packet(sta, tid); spin_lock(&priv->stream_lock); |