netdev - Re: [3.8-rc1] Networking problems after pulling-in net.git#master

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Message-ID: <CAM_iQpVdqYceHejqyQOn5wqj-xQFjn6E4u5ws4MuoOd=SiVtww@mail.gmail.com>
Date:	Sun, 23 Dec 2012 21:44:30 +0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	sedat.dilek@...il.com
Cc:	Borislav Petkov <bp@...en8.de>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [3.8-rc1] Networking problems after pulling-in net.git#master

On Sun, Dec 23, 2012 at 9:19 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>
> The culprit commit here seems to be...
>
> commit 9650388b5c56578fdccc79c57a8c82fb92b8e7f1
> Author: Eric Dumazet <edumazet@...gle.com>
> Date:   Fri Dec 21 07:32:10 2012 +0000
>
>     ipv4: arp: fix a lockdep splat in arp_solicit()

Can you try the following one-line fix?

Thanks.

------------>

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 1169ed4..75e0d7c 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -365,7 +365,7 @@ static void arp_solicit(struct neighbour *neigh,
struct sk_buff *skb)
                        pr_debug("trying to ucast probe in NUD_INVALID\n");
                neigh_ha_snapshot(dst_ha, neigh, dev);
        } else {
-               memset(dst_ha, 0, dev->addr_len);
+               memcpy(dst_ha, dev->broadcast, MAX_ADDR_LEN);
                probes -= neigh->parms->app_probes;
                if (probes < 0) {
 #ifdef CONFIG_ARPD
--
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