From: Cong Wang <amwang@redhat.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>
Subject: Re: [Patch net-next] ipv6: remove another useless NULL check
Date: Mon, 29 Oct 2012 17:08:15 +0800 [thread overview]
Message-ID: <1351501695.8221.11.camel@cr0> (raw)
In-Reply-To: <1351499588.7394.198.camel@edumazet-glaptop>
On Mon, 2012-10-29 at 09:33 +0100, Eric Dumazet wrote:
> On Mon, 2012-10-29 at 16:16 +0800, Cong Wang wrote:
> > When 'rt' is NULL, '&rt->dst' is NULL too because >dst
> > is always the first field of 'rt'. And dst_release accepts
> > NULL.
> >
> > Cc: Eric Dumazet <eric.dumazet@gmail.com>
> > Cc: David S. Miller <davem@davemloft.net>
> > Signed-off-by: Cong Wang <amwang@redhat.com>
> >
> > ---
> > diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
> > index 8f0b12a..adeb479 100644
> > --- a/net/ipv6/addrconf.c
> > +++ b/net/ipv6/addrconf.c
> > @@ -2027,8 +2027,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
> > addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
> > dev, expires, flags);
> > }
> > - if (rt)
> > - dst_release(&rt->dst);
> > + dst_release(&rt->dst);
> > }
> >
> > /* Try to figure out our local address for this prefix */
>
>
>
> Could you instead introduce a helper for that, like we have in IPv4.
Sure, that is better.
prev parent reply other threads:[~2012-10-29 9:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-29 3:50 [Patch net-next] ipv6: fix a potential NULL deref Cong Wang
2012-10-29 6:10 ` Eric Dumazet
2012-10-29 6:49 ` Cong Wang
2012-10-29 7:05 ` Eric Dumazet
2012-10-29 7:25 ` Cong Wang
2012-10-29 8:25 ` Eric Dumazet
2012-10-29 17:29 ` David Miller
2012-10-30 1:44 ` Cong Wang
2012-10-29 17:22 ` David Miller
2012-10-29 8:16 ` [Patch net-next] ipv6: remove another useless NULL check Cong Wang
2012-10-29 8:33 ` Eric Dumazet
2012-10-29 9:08 ` Cong Wang [this message]
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