linux-kernel - Re: [PATCH 5/6] staging: rtl8188eu: use safe iterator in rtw_sta

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Message-ID: <20210516192450.GE2126643@roeck-us.net>
Date:   Sun, 16 May 2021 12:24:50 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] staging: rtl8188eu: use safe iterator in
 rtw_sta_flush

On Sun, May 16, 2021 at 06:06:12PM +0200, Martin Kaiser wrote:
> Use list_for_each_safe, we may delete list items while iterating over
> the list.
> 
> Fixes: 23017c8842d2 ("staging: rtl8188eu: Use list iterators and helpers")
> Signed-off-by: Martin Kaiser <martin@...ser.cx>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
> compile-tested only
> 
>  drivers/staging/rtl8188eu/core/rtw_ap.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/rtl8188eu/core/rtw_ap.c b/drivers/staging/rtl8188eu/core/rtw_ap.c
> index 601974df4114..8ffafc7eb316 100644
> --- a/drivers/staging/rtl8188eu/core/rtw_ap.c
> +++ b/drivers/staging/rtl8188eu/core/rtw_ap.c
> @@ -1579,7 +1579,7 @@ u8 ap_free_sta(struct adapter *padapter, struct sta_info *psta,
>  
>  int rtw_sta_flush(struct adapter *padapter)
>  {
> -	struct list_head *phead, *plist;
> +	struct list_head *phead, *plist, *temp;
>  	struct sta_info *psta = NULL;
>  	struct sta_priv *pstapriv = &padapter->stapriv;
>  	struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
> @@ -1594,7 +1594,7 @@ int rtw_sta_flush(struct adapter *padapter)
>  	spin_lock_bh(&pstapriv->asoc_list_lock);
>  	phead = &pstapriv->asoc_list;
>  	/* free sta asoc_queue */
> -	list_for_each(plist, phead) {
> +	list_for_each_safe(plist, temp, phead) {
>  		psta = list_entry(plist, struct sta_info, asoc_list);
>  
>  		list_del_init(&psta->asoc_list);
> -- 
> 2.20.1
>