linux-kernel - Re: [PATCH] usb: typec: ucsi: ccg: fix memory leak in do

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Message-ID: <20190528080612.GC7167@kuha.fi.intel.com>
Date:   Tue, 28 May 2019 11:06:12 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ajay Gupta <ajayg@...dia.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: typec: ucsi: ccg: fix memory leak in do_flash

On Tue, May 28, 2019 at 11:04:52AM +0300, Heikki Krogerus wrote:
> On Mon, May 27, 2019 at 01:10:50PM -0500, Gustavo A. R. Silva wrote:
> > In case memory resources for *fw* were successfully allocated,
> > release them before return.
> > 
> > Addresses-Coverity-ID: 1445499 ("Resource leak")
> > Fixes: 5c9ae5a87573 ("usb: typec: ucsi: ccg: add firmware flashing support")
> > Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> 
> Acked-by: Heikki Krogerus <heikki.krogerus@...il.com>

That email address does not actually exist :-/. Sorry.

Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>


> > ---
> >  drivers/usb/typec/ucsi/ucsi_ccg.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
> > index 9d46aa9e4e35..bf63074675fc 100644
> > --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> > +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> > @@ -862,8 +862,10 @@ static int do_flash(struct ucsi_ccg *uc, enum enum_flash_mode mode)
> >  
> >  not_signed_fw:
> >  	wr_buf = kzalloc(CCG4_ROW_SIZE + 4, GFP_KERNEL);
> > -	if (!wr_buf)
> > -		return -ENOMEM;
> > +	if (!wr_buf) {
> > +		err = -ENOMEM;
> > +		goto release_fw;
> > +	}
> >  
> >  	err = ccg_cmd_enter_flashing(uc);
> >  	if (err)
> > -- 
> > 2.21.0

-- 
heikki