netdev - Re: [PATCH 4/4] net: improve the user pointer check in init_user

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Date:   Tue, 28 Jul 2020 11:53:25 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jan Engelhardt <jengelh@...i.de>,
        Ido Schimmel <idosch@...sch.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        David Laight <David.Laight@...LAB.COM>, netdev@...r.kernel.org
Subject: Re: [PATCH 4/4] net: improve the user pointer check in
 init_user_sockptr

On Tue, 28 Jul 2020 17:51:40 +0200 Christoph Hellwig wrote:
> On Tue, Jul 28, 2020 at 08:47:46AM -0700, Jakub Kicinski wrote:
> > Appears to cause these two new warnings, sadly:
> > 
> > net/ipv4/bpfilter/sockopt.c:68:56: warning: dereference of noderef expression
> > net/ipv4/bpfilter/sockopt.c:68:56: warning: dereference of noderef expression  
> 
> Shouldn't this just be one?  That one is justified, though as *optlen
> should be len.

Could be, seems like sparse duplicates some warnings in my build system,
not sure why :S