On Thu, Nov 14, 2013 at 9:33 PM, Felix Fietkau <nbd@xxxxxxxxxxx> wrote:
> Commit "rt2x00: fix HT TX descriptor settings regression"
> assumes that the control parameter to rt2x00mac_tx is always non-NULL.
> There is an internal call in rt2x00lib_bc_buffer_iter where NULL is
> passed. Fix the resulting crash by adding an initialized dummy on-stack
> ieee80211_tx_control struct.
>
> Cc: stable@xxxxxxxxxxxxxxx # 3.7+
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
Good catch!
Acked-by: Gertjan van Wingerde <gwingerde@xxxxxxxxx>
> ---
> drivers/net/wireless/rt2x00/rt2x00dev.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
> index 080b1fc..9dd92a7 100644
> --- a/drivers/net/wireless/rt2x00/rt2x00dev.c
> +++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
> @@ -181,6 +181,7 @@ static void rt2x00lib_autowakeup(struct work_struct *work)
> static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
> struct ieee80211_vif *vif)
> {
> + struct ieee80211_tx_control control = {};
> struct rt2x00_dev *rt2x00dev = data;
> struct sk_buff *skb;
>
> @@ -195,7 +196,7 @@ static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
> */
> skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
> while (skb) {
> - rt2x00mac_tx(rt2x00dev->hw, NULL, skb);
> + rt2x00mac_tx(rt2x00dev->hw, &control, skb);
> skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
> }
> }
> --
> 1.8.3.4 (Apple Git-47)
>
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--
---
Gertjan
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