From: Antoine Tenart <atenart@kernel.org>
To: Hangbin Liu <hangbin.liu@linux.dev>
Cc: Zhou Qiuyue <n0ps1edzz@gmail.com>,
netdev@vger.kernel.org, David Ahern <dsahern@kernel.org>,
Ido Schimmel <idosch@nvidia.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@kernel.org>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH net v2] ipv6: raw: fix use-after-free in rawv6_send_hdrinc()
Date: Mon, 26 Oct 2026 16:07:40 +0100 [thread overview]
Message-ID: <at9sKRSEJLVGj9OK@kwain> (raw)
In-Reply-To: <at7uk8gXtzNufuQF@fedora>
On Mon, Oct 26, 2026 at 02:09:23PM +0800, Hangbin Liu wrote:
> On Mon, Oct 26, 2026 at 12:48:08PM +0800, Zhou Qiuyue wrote:
> > diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
> > index b965258cf..bdea82543 100644
> > --- a/net/ipv6/raw.c
> > +++ b/net/ipv6/raw.c
> > @@ -654,6 +654,9 @@ static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
> > if (unlikely(!skb))
> > return 0;
> >
> > + /* l3mdev_ip6_out() may have replaced the skb dst. */
> > + rt = dst_rt6_info(skb_dst(skb));
> > +
> > /* Acquire rcu_read_lock() in case we need to use rt->rt6i_idev
> > * in the error path. Since skb has been freed, the dst could
> > * have been queued for deletion.
>
> Reviewed-by: Hangbin Liu <liuhangbin@kylinos.cn>
Doesn't this change the device seen by the nf hook / used for the stats?
next prev parent reply other threads:[~2026-10-26 15:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-26 4:48 Zhou Qiuyue
2026-10-26 6:09 ` Hangbin Liu
2026-10-26 15:07 ` Antoine Tenart [this message]
2026-10-27 1:38 ` Hangbin Liu
2026-10-27 9:43 ` Antoine Tenart
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