linux-kernel - Re: [PATCH 6/6] staging: r8188eu: use ARRAY_SIZE for mlme_sta

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Date:   Fri, 22 Apr 2022 12:20:18 +0200
From:   Martin Kaiser <martin@...ser.cx>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] staging: r8188eu: use ARRAY_SIZE for mlme_sta_tbl

Thus wrote Dan Carpenter (dan.carpenter@...cle.com):

> On Sun, Apr 17, 2022 at 12:22:21PM +0200, Martin Kaiser wrote:
> > Use ARRAY_SIZE instead of hard-coding the number of entries in the
> > mlme_sta_tbl array.

> > Signed-off-by: Martin Kaiser <martin@...ser.cx>
> > ---
> >  drivers/staging/r8188eu/core/rtw_mlme_ext.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)

> > diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
> > index abb910f33c1c..973adebdd69c 100644
> > --- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
> > +++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
> > @@ -404,7 +404,7 @@ void mgt_dispatcher(struct adapter *padapter, struct recv_frame *precv_frame)
> >  		return;

> >  	index = (le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
> > -	if (index > 13)
> > +	if (index > ARRAY_SIZE(mlme_sta_tbl))
>                   ^
> This is an off by one.  Should be >=.  The auto builders would have
> caught this eventually.

Thanks for spotting this, Dan. You're right, the array has 14 elements :-(

This has already made it into staging-next, I'll fix it in a new patch.

Best regards,
Martin

> >  		return;
> >  	fct = mlme_sta_tbl[index];

> regards,
> dan carpenter