Subject: Re: [PATCH v2] rtlwifi: fix memory leak for USB device

From: Larry Finger <[email-masked]>
Date: Sun, 6 Dec 2015 20:14:21 -0600

On 12/06/2015 06:07 PM, Peter Wu wrote:
> Free skb for received frames with a wrong checksum. This can happen
> pretty rapidly, exhausting all memory.
>
> This fixes a memleak (detected with kmemleak). Originally found while
> using monitor mode, but it also appears during managed mode (once the
> link is up).
>
> Cc: [email-masked]
> Signed-off-by: Peter Wu <[email-masked]>
> ---
>   v2: updated commit message based on Larry's feedback
>   v1: https://lkml.kernel.org/r/[email-masked]
>
> Tested with v4.3, rebased on v4.4-rc3 (changed paths). The bug goes back
> to its introduction in the v2.6.x kernel.
> ---
>   drivers/net/wireless/realtek/rtlwifi/usb.c | 2 ++
>   1 file changed, 2 insertions(+)

ACKed-by: Larry Finger <[email-masked]>

Thanks,

Larry

>
> diff --git a/drivers/net/wireless/realtek/rtlwifi/usb.c b/drivers/net/wireless/realtek/rtlwifi/usb.c
> index 2721cf8..aac1ed3 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/usb.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/usb.c
> @@ -531,6 +531,8 @@ static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
>   			ieee80211_rx(hw, skb);
>   		else
>   			dev_kfree_skb_any(skb);
> +	} else {
> +		dev_kfree_skb_any(skb);
>   	}
>   }
>
>