netdev - Re: [PATCH -next] neigh: remove the extra slash

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Date:   Sat, 24 Oct 2020 19:27:10 -0700
From:   Joe Perches <joe@...ches.com>
To:     Vasily Averin <vvs@...tuozzo.com>,
        Zhang Qilong <zhangqilong3@...wei.com>, davem@...emloft.net,
        kuba@...nel.org
Cc:     lirongqing@...du.com, roopa@...ulusnetworks.com,
        netdev@...r.kernel.org
Subject: Re: [PATCH -next] neigh: remove the extra slash

On Fri, 2020-10-23 at 13:16 +0300, Vasily Averin wrote:
> On 10/23/20 1:01 PM, Zhang Qilong wrote:
> > The normal path has only one slash.
> 
> it is not normal path
> this string is used to calculate number of symbols in "net/%s/neigh/%s" used below

Then probably better would be to add +1 rather than
use a rather odd filename.

> > diff --git a/net/core/neighbour.c b/net/core/neighbour.c
[]
> > @@ -3623,7 +3623,7 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
> >  	int i;
> >  	struct neigh_sysctl_table *t;
> >  	const char *dev_name_source;
> > -	char neigh_path[ sizeof("net//neigh/") + IFNAMSIZ + IFNAMSIZ ];
> > +	char neigh_path[sizeof("net/neigh/") + IFNAMSIZ + IFNAMSIZ];
> >  	char *p_name;
> >  
> > 
> >  	t = kmemdup(&neigh_sysctl_template, sizeof(*t), GFP_KERNEL);
> >