netdev - Re: [PATCH net-next] net: adjust skb->truesize in pskb_expand

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Date:   Thu, 26 Jan 2017 18:34:58 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Slava Shwartsman <slavash@...lanox.com>
Subject: Re: [PATCH net-next] net: adjust skb->truesize in pskb_expand_head()

On Fri, 2017-01-27 at 10:22 +0800, kbuild test robot wrote:
> Hi Eric,
> 
> [auto build test WARNING on net-next/master]
> 
> url:    https://github.com/0day-ci/linux/commits/Eric-Dumazet/net-adjust-skb-truesize-in-pskb_expand_head/20170127-082517
> config: i386-randconfig-x0-01270914 (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386 

Hmm... I thought sock_edemux was safe, but apparently it uses a
parameter for no good reason.

I will add this to v2

diff --git a/include/net/sock.h b/include/net/sock.h
index 7144750d14e56b9d5392e43dc46cb40a87e3d397..94e65fd703548dd40e16c30207fd55c879ed0b60 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1534,7 +1534,7 @@ void sock_efree(struct sk_buff *skb);
 #ifdef CONFIG_INET
 void sock_edemux(struct sk_buff *skb);
 #else
-#define sock_edemux(skb) sock_efree(skb)
+#define sock_edemux sock_efree
 #endif
 
 int sock_setsockopt(struct socket *sock, int level, int op,