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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jerome Pouiller <Jerome.Pouiller@silabs.com>
Cc: devel@driverdev.osuosl.org, linux-wireless@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"David S . Miller" <davem@davemloft.net>,
	Kalle Valo <kvalo@codeaurora.org>
Subject: Re: [PATCH 08/32] staging: wfx: simplify hif_handle_tx_data()
Date: Thu, 2 Apr 2020 16:13:39 +0300	[thread overview]
Message-ID: <20200402131338.GS2001@kadam> (raw)
In-Reply-To: <20200401110405.80282-9-Jerome.Pouiller@silabs.com>

On Wed, Apr 01, 2020 at 01:03:41PM +0200, Jerome Pouiller wrote:
> From: Jérôme Pouiller <jerome.pouiller@silabs.com>
> 
> The last argument of hif_handle_tx_data() was now unused. In add,
> hif_handle_tx_data() has nothing to do with HIF layer and should be
> renamed. Finally, it not convenient to pass a wfx_vif as parameter. It
> is easier to let hif_handle_tx_data() find the interface itself.
> 
> Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
> ---
>  drivers/staging/wfx/queue.c | 19 ++++++++++---------
>  1 file changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c
> index 2553f77522d9..8647731e02c0 100644
> --- a/drivers/staging/wfx/queue.c
> +++ b/drivers/staging/wfx/queue.c
> @@ -319,13 +319,17 @@ bool wfx_tx_queues_is_empty(struct wfx_dev *wdev)
>  	return ret;
>  }
>  
> -static bool hif_handle_tx_data(struct wfx_vif *wvif, struct sk_buff *skb,
> -			       struct wfx_queue *queue)
> +static bool wfx_handle_tx_data(struct wfx_dev *wdev, struct sk_buff *skb)
>  {
>  	struct hif_req_tx *req = wfx_skb_txreq(skb);
>  	struct ieee80211_key_conf *hw_key = wfx_skb_tx_priv(skb)->hw_key;
>  	struct ieee80211_hdr *frame =
>  		(struct ieee80211_hdr *)(req->frame + req->data_flags.fc_offset);
> +	struct wfx_vif *wvif =
> +		wdev_to_wvif(wdev, ((struct hif_msg *)skb->data)->interface);
                                                      ^^^^^^^^^
This is on the TX side so it's probably okay, but one problem I have
noticed is that we do this on the RX side as well with checking that

	if (skb->len < sizeof(struct hif_msg))
		return -EINVAL;

So we could be reading beyond the end of the skb.  If we got really
unlucky it could lead to an Oops.

regards,
dan carpenter


  reply	other threads:[~2020-04-02 13:13 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-01 11:03 [PATCH 00/32] staging: wfx: rework the Tx queue Jerome Pouiller
2020-04-01 11:03 ` [PATCH 01/32] staging: wfx: add sanity checks to hif_join() Jerome Pouiller
2020-04-02 12:42   ` Dan Carpenter
2020-04-02 16:14     ` Jérôme Pouiller
2020-04-01 11:03 ` [PATCH 02/32] staging: wfx: do not stop mac80211 queueing during tx_policy upload Jerome Pouiller
2020-04-01 11:03 ` [PATCH 03/32] staging: wfx: take advantage of ieee80211_{stop/start}_queues Jerome Pouiller
2020-04-01 11:03 ` [PATCH 04/32] staging: wfx: remove "burst" mechanism Jerome Pouiller
2020-04-02 13:05   ` Dan Carpenter
2020-04-02 14:47     ` Jérôme Pouiller
2020-04-01 11:03 ` [PATCH 05/32] staging: wfx: uniformize queue_id retrieval Jerome Pouiller
2020-04-01 11:03 ` [PATCH 06/32] staging: wfx: drop useless queue_id field Jerome Pouiller
2020-04-01 11:03 ` [PATCH 07/32] staging: wfx: avoid useless wake_up Jerome Pouiller
2020-04-01 11:03 ` [PATCH 08/32] staging: wfx: simplify hif_handle_tx_data() Jerome Pouiller
2020-04-02 13:13   ` Dan Carpenter [this message]
2020-04-02 14:44     ` Jérôme Pouiller
2020-04-01 11:03 ` [PATCH 09/32] staging: wfx: simplify wfx_tx_queues_empty() Jerome Pouiller
2020-04-01 11:03 ` [PATCH 10/32] staging: wfx: drop unused argument in wfx_get_prio_queue() Jerome Pouiller
2020-04-01 11:03 ` [PATCH 11/32] staging: wfx: simplify wfx_tx_queue_mask_get() Jerome Pouiller
2020-04-01 11:03 ` [PATCH 12/32] staging: wfx: drop useless sta_asleep_mask Jerome Pouiller
2020-04-01 11:03 ` [PATCH 13/32] staging: wfx: drop argument tx_allowed_mask since it is constant now Jerome Pouiller
2020-04-01 11:03 ` [PATCH 14/32] staging: wfx: do not use link_map_cache to track CAB Jerome Pouiller
2020-04-01 11:03 ` [PATCH 15/32] staging: wfx: drop useless link_map_cache Jerome Pouiller
2020-04-01 11:03 ` [PATCH 16/32] staging: wfx: do not rely anymore on link_id to choose packet in queue Jerome Pouiller
2020-04-01 11:03 ` [PATCH 17/32] staging: wfx: drop unused link_id field Jerome Pouiller
2020-04-01 11:03 ` [PATCH 18/32] staging: wfx: drop unused raw_link_id field Jerome Pouiller
2020-04-01 11:03 ` [PATCH 19/32] staging: wfx: rename wfx_tx_get_raw_link_id() Jerome Pouiller
2020-04-01 11:03 ` [PATCH 20/32] staging: wfx: replace wfx_tx_queues_get_after_dtim() by wfx_tx_queues_has_cab() Jerome Pouiller
2020-04-01 11:03 ` [PATCH 21/32] staging: wfx: introduce a counter of pending frames Jerome Pouiller
2020-04-01 11:03 ` [PATCH 22/32] staging: wfx: change the way to choose frame to send Jerome Pouiller
2020-04-01 11:03 ` [PATCH 23/32] staging: wfx: drop now useless field edca_params Jerome Pouiller
2020-04-01 11:03 ` [PATCH 24/32] staging: wfx: drop struct wfx_queue_stats Jerome Pouiller
2020-04-01 11:03 ` [PATCH 25/32] staging: wfx: simplify usage of wfx_tx_queues_put() Jerome Pouiller
2020-04-01 11:03 ` [PATCH 26/32] staging: wfx: improve interface between data_tx.c and queue.c Jerome Pouiller
2020-04-01 11:04 ` [PATCH 27/32] staging: wfx: relocate wfx_skb_dtor() prior its callers Jerome Pouiller
2020-04-01 11:04 ` [PATCH 28/32] staging: wfx: repair wfx_flush() Jerome Pouiller
2020-04-01 11:04 ` [PATCH 29/32] staging: wfx: wfx_flush() did not ensure that frames are processed Jerome Pouiller
2020-04-01 11:04 ` [PATCH 30/32] staging: wfx: fix potential deadlock in wfx_tx_flush() Jerome Pouiller
2020-04-01 11:04 ` [PATCH 31/32] staging: wfx: fix case where AP stop with CAB traffic pending Jerome Pouiller
2020-04-01 11:04 ` [PATCH 32/32] staging: wfx: remove hack about tx_rate policies Jerome Pouiller
2020-04-03  8:03 ` [PATCH 00/32] staging: wfx: rework the Tx queue Dan Carpenter

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