netdev - Re: [PATCH 2/3] staging: r8188eu: Fix case where ethtype was never obtained and always be checked against 0

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Message-ID: <53457428.4030408@cogentembedded.com>
Date:	Wed, 09 Apr 2014 20:24:08 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Larry Finger <Larry.Finger@...inger.net>,
	gregkh@...uxfoundation.org
CC:	netdev@...r.kernel.org, devel@...verdev.osuosl.org,
	Stable <stable@...r.kernel.org>
Subject: Re: [PATCH 2/3] staging: r8188eu: Fix case where ethtype was never
 obtained and always be checked against 0

On 04/09/2014 08:12 PM, Larry Finger wrote:

> Zero-initializing ether_type masked that the ether type would never be
> obtained for 8021x packets and the comparition against eapol_type
> would always fail.

> Reported-by: Jes Sorensen <Jes.Sorensen@...hat.com>
> Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
> Cc: Stable <stable@...r.kernel.org>
> ---
>   drivers/staging/rtl8188eu/core/rtw_recv.c | 20 ++++++++------------
>   1 file changed, 8 insertions(+), 12 deletions(-)

> diff --git a/drivers/staging/rtl8188eu/core/rtw_recv.c b/drivers/staging/rtl8188eu/core/rtw_recv.c
> index 01fcabc..61084d6 100644
> --- a/drivers/staging/rtl8188eu/core/rtw_recv.c
> +++ b/drivers/staging/rtl8188eu/core/rtw_recv.c
> @@ -551,7 +551,7 @@ static struct recv_frame *portctrl(struct adapter *adapter,
>   	struct sta_info *psta;
>   	struct sta_priv *pstapriv;
>   	struct recv_frame *prtnframe;
> -	u16	ether_type = 0;
> +	u16	ether_type;

    I suggest:

	u16 ethertype;

>   	u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
>   	struct rx_pkt_attrib *pattrib;
>   	__be16 be_tmp;
> @@ -571,19 +571,17 @@ static struct recv_frame *portctrl(struct adapter *adapter,
>
>   	RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
>
> -	if (auth_alg == 2) {
> +	if (auth_alg == dot11AuthAlgrthm_8021X) {
> +		/* get ether_type */
> +		ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;

    Why not:

		ptr += pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;

WBR, Sergei


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