netdev - Re: 4.4-rc2 xfrm_lookup kasan trace

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Message-ID: <1449162578.25029.0.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 03 Dec 2015 09:09:38 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	davej@...emonkey.org.uk, netdev@...r.kernel.org
Subject: Re: 4.4-rc2 xfrm_lookup kasan trace

On Thu, 2015-12-03 at 11:59 -0500, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Mon, 30 Nov 2015 17:22:11 -0800
> 
> > @@ -2198,6 +2198,7 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
> >  	xdst = NULL;
> >  	route = NULL;
> >  
> > +	sk = sk_to_full_sk((struct sock *)sk);
> 
> The war against const...
> 
> I know this is the only instance where const is input, but you may want to
> consider adding the const verion of the helper anyways to avoid ugly casts
> like this.

Agreed, it is sad C language has no way to 'propagate' the const..



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