2013-07-16 09:05:27

by Michal Kazior

Subject: [PATCH] ath10k: fix NULL dereference for injected packets

Tx processing functions dereference vif and caused
NULL to be dereferenced for injected frames.

Don't call these functions at all for injected
frames. It doesn't make much sense to do so
anyway.

Signed-off-by: Michal Kazior <[email protected]>
---
drivers/net/wireless/ath/ath10k/mac.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 5082503..cdc08a0 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -1687,10 +1687,14 @@ static void ath10k_tx(struct ieee80211_hw *hw,
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
}

- ath10k_tx_h_qos_workaround(hw, control, skb);
- ath10k_tx_h_update_wep_key(skb);
- ath10k_tx_h_add_p2p_noa_ie(ar, skb);
- ath10k_tx_h_seq_no(skb);
+ /* it makes no sense to process injected frames like that */
+ if (info->control.vif &&
+ info->control.vif->type != NL80211_IFTYPE_MONITOR) {
+ ath10k_tx_h_qos_workaround(hw, control, skb);
+ ath10k_tx_h_update_wep_key(skb);
+ ath10k_tx_h_add_p2p_noa_ie(ar, skb);
+ ath10k_tx_h_seq_no(skb);
+ }

memset(ATH10K_SKB_CB(skb), 0, sizeof(*ATH10K_SKB_CB(skb)));
ATH10K_SKB_CB(skb)->htt.vdev_id = vdev_id;
--
1.7.9.5

2013-07-19 10:36:16

by Kalle Valo

Subject: Re: [PATCH] ath10k: fix NULL dereference for injected packets

Michal Kazior <[email protected]> writes:

> Tx processing functions dereference vif and caused
> NULL to be dereferenced for injected frames.
>
> Don't call these functions at all for injected
> frames. It doesn't make much sense to do so
> anyway.
>
> Signed-off-by: Michal Kazior <[email protected]>

Thanks, applied.

--
Kalle Valo