netdev - RE: [PATCH v2] wifi: rtw88: fix memory leak in rtw_usb

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Message-ID: <792ecb45f7e540b1abdb30bf965c5072@realtek.com>
Date:   Thu, 9 Mar 2023 03:47:31 +0000
From:   Ping-Ke Shih <pkshih@...ltek.com>
To:     Dongliang Mu <dzm91@...t.edu.cn>,
        Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
CC:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2] wifi: rtw88: fix memory leak in rtw_usb_probe()



> -----Original Message-----
> From: Dongliang Mu <dzm91@...t.edu.cn>
> Sent: Thursday, March 9, 2023 10:17 AM
> To: Yan-Hsuan Chuang <tony0620emma@...il.com>; Kalle Valo <kvalo@...nel.org>; David S. Miller
> <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
> <pabeni@...hat.com>
> Cc: Dongliang Mu <dzm91@...t.edu.cn>; linux-wireless@...r.kernel.org; netdev@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Subject: [PATCH v2] wifi: rtw88: fix memory leak in rtw_usb_probe()
> 
> drivers/net/wireless/realtek/rtw88/usb.c:876 rtw_usb_probe()
> warn: 'hw' from ieee80211_alloc_hw() not released on lines: 811

Can I know which tool can detect this? It would be good to mention the tool
in commit message.

> 
> Fix this by modifying return to a goto statement.
> 
> Signed-off-by: Dongliang Mu <dzm91@...t.edu.cn>
> ---
> v1->v2: modify the commit title
>  drivers/net/wireless/realtek/rtw88/usb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c
> index 2a8336b1847a..68e1b782d199 100644
> --- a/drivers/net/wireless/realtek/rtw88/usb.c
> +++ b/drivers/net/wireless/realtek/rtw88/usb.c
> @@ -808,7 +808,7 @@ int rtw_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
> 
>         ret = rtw_usb_alloc_rx_bufs(rtwusb);
>         if (ret)
> -               return ret;
> +               goto err_release_hw;
> 
>         ret = rtw_core_init(rtwdev);
>         if (ret)
> --
> 2.39.2