linux-kernel - Re: [PATCH] Next branch: authgss: authgss.c: Fix warnings for uninitizlized variable expire

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Message-ID: <CAHQdGtQAwp_QuQE-xmjJNkcxbu7g4QtYQv8qrPT_qWpkym1GZg@mail.gmail.com>
Date:	Mon, 1 Sep 2014 09:50:57 -0400
From:	Trond Myklebust <trond.myklebust@...marydata.com>
To:	Shakil A Khan <shakilk1729@...il.com>
Cc:	Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
	Linux Kernel mailing list <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	William Andros Adamson <andros@...app.com>,
	Jeffrey Layton <jlayton@...marydata.com>,
	"David S. Miller" <davem@...emloft.net>,
	Bruce Fields <bfields@...ldses.org>
Subject: Re: [PATCH] Next branch: authgss: authgss.c: Fix warnings for
 uninitizlized variable expire

On Mon, Sep 1, 2014 at 7:32 AM, Shakil A Khan <shakilk1729@...il.com> wrote:
> Signed-off-by : Shakil A Khan <shakilk1729@...il.com>
> ---
>  net/sunrpc/auth_gss/auth_gss.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
> index afb292c..bea0951 100644
> --- a/net/sunrpc/auth_gss/auth_gss.c
> +++ b/net/sunrpc/auth_gss/auth_gss.c
> @@ -1387,7 +1387,7 @@ gss_key_timeout(struct rpc_cred *rc)
>         struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
>         struct gss_cl_ctx *ctx;
>         unsigned long now = jiffies;
> -       unsigned long expire;
> +       unsigned long expire = 0;
>
>         rcu_read_lock();
>         ctx = rcu_dereference(gss_cred->gc_ctx);
> --
> 1.7.1

That would be a compiler bug, not a kernel bug. The kernel code is
perfectly correct as it stands, and will never access the
uninitialised variable.

-- 
Trond Myklebust

Linux NFS client maintainer, PrimaryData

trond.myklebust@...marydata.com
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