Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 as permitted sender) client-ip=23.128.96.36;
Date:   Fri, 13 Oct 2023 07:53:46 +0200
From:   Steffen Klassert <steffen.klassert@secunet.com>
To:     Herbert Xu <herbert@gondor.apana.org.au>
CC:     Cong Wang <xiyou.wangcong@gmail.com>, Ma Ke <make_ruc2021@163.com>,
        <davem@davemloft.net>, <dsahern@kernel.org>, <edumazet@google.com>,
        <kuba@kernel.org>, <pabeni@redhat.com>, <netdev@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] net: ipv6: fix return value check in esp_remove_trailer
Message-ID: <ZSjbatU0tcVZGWCW@gauss3.secunet.de>
References: <20231007005953.3994960-1-make_ruc2021@163.com>
 <ZSLh0vtpbP81Vh7G@pop-os.localdomain>
 <ZSUTdBpSTgNz5CA8@gondor.apana.org.au>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <ZSUTdBpSTgNz5CA8@gondor.apana.org.au>
Precedence: bulk

On Tue, Oct 10, 2023 at 05:03:48PM +0800, Herbert Xu wrote:
> On Sun, Oct 08, 2023 at 10:07:30AM -0700, Cong Wang wrote:
> > On Sat, Oct 07, 2023 at 08:59:53AM +0800, Ma Ke wrote:
> > > In esp_remove_trailer(), to avoid an unexpected result returned by
> > > pskb_trim, we should check the return value of pskb_trim().
> > > 
> > > Signed-off-by: Ma Ke <make_ruc2021@163.com>
> > > ---
> > >  net/ipv6/esp6.c | 4 +++-
> > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > We need the same change for net/ipv4/esp4.c?
> 
> Please verify that it can actually fail first.  Note that I'm
> busy right now so I haven't looked at it at all.

It can, we don't linearize the packte data anymore.