linux-kernel - Re: [PATCH] infiniband: cxgb4: cm: Check skb value

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Message-ID: <ZPcg7/QbN73C/OYK@localhost.localdomain>
Date:   Tue, 5 Sep 2023 15:37:03 +0300
From:   Artem Chernyshev <artem.chernyshev@...-soft.ru>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Leon Romanovsky <leon@...nel.org>,
        Potnuri Bharat Teja <bharat@...lsio.com>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH] infiniband: cxgb4: cm: Check skb value

On Mon, Sep 04, 2023 at 10:07:26PM +0200, Krzysztof Kozlowski wrote:
> On 04/09/2023 13:59, Artem Chernyshev wrote:
> > get_skb() can't allocate skb in case of OOM.
> > 
> > Found by Linux Verification Center (linuxtesting.org) with SVACE.
> > 
> > Signed-off-by: Artem Chernyshev <artem.chernyshev@...-soft.ru>
> > ---
> >  drivers/infiniband/hw/cxgb4/cm.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
> > index ced615b5ea09..775da62b38ec 100644
> > --- a/drivers/infiniband/hw/cxgb4/cm.c
> > +++ b/drivers/infiniband/hw/cxgb4/cm.c
> > @@ -1965,6 +1965,10 @@ static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
> >  	int win;
> >  
> >  	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
> > +	if (!skb) {
> > +		pr_err("%s - cannot alloc skb!\n", __func__);
> 
> I don't think we print memory allocation failures.
> 
> Best regards,
> Krzysztof
> 

Sure, will fix that in v2

Thanks,
Artem