linux-kernel - Re: [PATCH] net: ipv6: fix return value check in esp_remove

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZSjbatU0tcVZGWCW@gauss3.secunet.de>
Date:   Fri, 13 Oct 2023 07:53:46 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
CC:     Cong Wang <xiyou.wangcong@...il.com>, Ma Ke <make_ruc2021@....com>,
        <davem@...emloft.net>, <dsahern@...nel.org>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: ipv6: fix return value check in esp_remove_trailer

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@....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.