netdev - Re: [PATCH net] net: sched: fix initialiser warning in sch

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Date:   Sun, 19 Sep 2021 23:49:22 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Davide Caratti <dcaratti@...hat.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        netdev@...r.kernel.org
Subject: Re: [PATCH net] net: sched: fix initialiser warning in sch_frag.c

On Sun, Sep 19, 2021 at 11:40:33PM +0100, Russell King (Oracle) wrote:
> Debian gcc 10.2.1 complains thusly:

Correction: this is with ARM gcc 4.9.4 with the 5.14 kernel which is
no longer supported by 5.15-rc. Please ignore.

> 
> net/sched/sch_frag.c:93:10: warning: missing braces around initializer [-Wmissing-braces]
>    struct rtable sch_frag_rt = { 0 };
>           ^
> net/sched/sch_frag.c:93:10: warning: (near initialization for 'sch_frag_rt.dst') [-Wmissing-braces]
> 
> Fix it by removing the unnecessary '0' initialiser, leaving the
> braces.
> 
> Fixes: 31fe34a0118e ("net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets")
> Suggested-by: Michael Ellerman <mpe@...erman.id.au>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
>  net/sched/sch_frag.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/sched/sch_frag.c b/net/sched/sch_frag.c
> index 8c06381391d6..ab359d63287c 100644
> --- a/net/sched/sch_frag.c
> +++ b/net/sched/sch_frag.c
> @@ -90,7 +90,7 @@ static int sch_fragment(struct net *net, struct sk_buff *skb,
>  	}
>  
>  	if (skb_protocol(skb, true) == htons(ETH_P_IP)) {
> -		struct rtable sch_frag_rt = { 0 };
> +		struct rtable sch_frag_rt = { };
>  		unsigned long orig_dst;
>  
>  		sch_frag_prepare_frag(skb, xmit);
> -- 
> 2.30.2
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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