linux-kernel - Re: [PATCH] sunrpc: removed redundant procp check

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Date: Wed, 27 Mar 2024 10:10:53 -0400
From: Chuck Lever <chuck.lever@...cle.com>
To: Aleksandr Aprelkov <aaprelkov@...rgate.com>
Cc: Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>, Jeff Layton <jlayton@...nel.org>,
        Neil Brown <neilb@...e.de>, Olga Kornievskaia <kolga@...app.com>,
        Dai Ngo <Dai.Ngo@...cle.com>, Tom Talpey <tom@...pey.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-nfs@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org
Subject: Re: [PATCH] sunrpc: removed redundant procp check

On Wed, Mar 27, 2024 at 02:10:44PM +0700, Aleksandr Aprelkov wrote:
> since vs_proc pointer is dereferenced before getting it's address there's
> no need to check for NULL.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 8e5b67731d08 ("SUNRPC: Add a callback to initialise server requests")
> Signed-off-by: Aleksandr Aprelkov <aaprelkov@...rgate.com>

Applied to nfsd-next. Thanks!


> ---
>  net/sunrpc/svc.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
> index b33e429336fb..2b4b1276d4e8 100644
> --- a/net/sunrpc/svc.c
> +++ b/net/sunrpc/svc.c
> @@ -1265,8 +1265,6 @@ svc_generic_init_request(struct svc_rqst *rqstp,
>  	if (rqstp->rq_proc >= versp->vs_nproc)
>  		goto err_bad_proc;
>  	rqstp->rq_procinfo = procp = &versp->vs_proc[rqstp->rq_proc];
> -	if (!procp)
> -		goto err_bad_proc;
>  
>  	/* Initialize storage for argp and resp */
>  	memset(rqstp->rq_argp, 0, procp->pc_argzero);
> -- 
> 2.34.1
> 

-- 
Chuck Lever