linux-kernel - Re: [PATCH] octeontx2-af: Fix memory leak of object buf

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Message-ID: <CA+sq2CekDZgxec43sBOZ4nLJwVE=PdGdHwYogWAPvyCNwZ0Wnw@mail.gmail.com>
Date:   Wed, 24 Mar 2021 12:37:15 +0530
From:   Sunil Kovvuri <sunil.kovvuri@...il.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Sunil Goutham <sgoutham@...vell.com>,
        Linu Cherian <lcherian@...vell.com>,
        Geetha sowjanya <gakula@...vell.com>,
        Jerin Jacob <jerinj@...vell.com>,
        hariprasad <hkelam@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rakesh Babu <rsaladi2@...vell.com>,
        Linux Netdev List <netdev@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] octeontx2-af: Fix memory leak of object buf

On Tue, Mar 23, 2021 at 6:07 PM Colin King <colin.king@...onical.com> wrote:
>
> From: Colin Ian King <colin.king@...onical.com>
>
> Currently the error return path when lfs fails to allocate is not free'ing
> the memory allocated to buf. Fix this by adding the missing kfree.
>
> Addresses-Coverity: ("Resource leak")
> Fixes: f7884097141b ("octeontx2-af: Formatting debugfs entry rsrc_alloc.")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
> index 8ec17ee72b5d..9bf8eaabf9ab 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
> @@ -253,8 +253,10 @@ static ssize_t rvu_dbg_rsrc_attach_status(struct file *filp,
>                 return -ENOSPC;
>
>         lfs = kzalloc(lf_str_size, GFP_KERNEL);
> -       if (!lfs)
> +       if (!lfs) {
> +               kfree(buf);
>                 return -ENOMEM;
> +       }
>         off +=  scnprintf(&buf[off], buf_size - 1 - off, "%-*s", lf_str_size,
>                           "pcifunc");
>         for (index = 0; index < BLK_COUNT; index++)
> --
> 2.30.2
>

Thanks for the fix,
Acked-by: Sunil Goutham <sgoutham@...vell.com>