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

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Message-ID: <4630a0ec293ba44672e8c8fbe046794b8688e60c.camel@kernel.org>
Date: Wed, 27 Mar 2024 06:09:09 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Aleksandr Aprelkov <aaprelkov@...rgate.com>, Trond Myklebust
	 <trond.myklebust@...merspace.com>
Cc: Anna Schumaker <anna@...nel.org>, Chuck Lever <chuck.lever@...cle.com>, 
 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, 2024-03-27 at 14:10 +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>
> ---
>  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);

This should probably go in via Chuck's tree.

Reviewed-by: Jeff Layton <jlayton@...nel.org>