linux-kernel - Re: [PATCH] vxlan: Wrong type passed to %pIS

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Date:	Fri, 6 Feb 2015 21:13:31 -0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Pravin B Shelar <pshelar@...ira.com>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] vxlan: Wrong type passed to %pIS

On Fri, Feb 6, 2015 at 6:17 PM, Rasmus Villemoes
<linux@...musvillemoes.dk> wrote:
> src_ip is a pointer to a union vxlan_addr, one member of which is a
> struct sockaddr. Passing a pointer to src_ip is wrong; one should pass
> the value of src_ip itself. Since %pIS formally expects something of
> type struct sockaddr*, let's pass a pointer to the appropriate union
> member, though this of course doesn't change the generated code.
>


It is a union, this doesn't harm.

> Fixes: e4c7ed415387 ("vxlan: add ipv6 support")
> Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
> ---
>  drivers/net/vxlan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
> index a8c755dcab14..11defbb24183 100644
> --- a/drivers/net/vxlan.c
> +++ b/drivers/net/vxlan.c
> @@ -991,7 +991,7 @@ static bool vxlan_snoop(struct net_device *dev,
>                 if (net_ratelimit())
>                         netdev_info(dev,
>                                     "%pM migrated from %pIS to %pIS\n",
> -                                   src_mac, &rdst->remote_ip, &src_ip);
> +                                   src_mac, &rdst->remote_ip.sa, &src_ip->sa);
>
>                 rdst->remote_ip = *src_ip;
>                 f->updated = jiffies;

Since you are on it, there is another similar place in vxlan too.
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