linux-kernel - Re: [PATCH] mwifiex: fix memory leak on regd when chan is zero

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Message-ID: <87vaxx9jhk.fsf@kamboji.qca.qualcomm.com>
Date:   Thu, 15 Sep 2016 20:10:47 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Amitkumar Karwar <akarwar@...vell.com>,
        Nishant Sarmukadam <nishants@...vell.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mwifiex: fix memory leak on regd when chan is zero

Colin King <colin.king@...onical.com> writes:

> From: Colin Ian King <colin.king@...onical.com>
>
> When chan is zero mwifiex_create_custom_regdomain does not kfree
> regd and we have a memory leak. Fix this by freeing regd before
> the return.
>
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c b/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
> index 3344a26..15a91f3 100644
> --- a/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
> +++ b/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
> @@ -1049,8 +1049,10 @@ mwifiex_create_custom_regdomain(struct mwifiex_private *priv,
>  		enum nl80211_band band;
>  
>  		chan = *buf++;
> -		if (!chan)
> +		if (!chan) {
> +			kfree(regd);
>  			return NULL;
> +		}

Bob sent a similar fix and he also did more:

mwifiex: fix error handling in mwifiex_create_custom_regdomain

https://patchwork.kernel.org/patch/9331337/

-- 
Kalle Valo