linux-kernel - Re: [PATCH] net/netfiliter: Fix used uninitialized warn in ip_vs_proc_sync

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Message-ID: <15645b18-f0ec-81f5-61ed-da8c141e5110@Netapp.com>
Date:   Mon, 7 Nov 2016 10:44:10 -0500
From:   Anna Schumaker <Anna.Schumaker@...app.com>
To:     Shuah Khan <shuahkh@....samsung.com>,
        <trond.myklebust@...marydata.com>
CC:     <linux-nfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net/netfiliter: Fix used uninitialized warn in
 ip_vs_proc_sync_conn()

Hi Shuah,

On 11/07/2016 10:41 AM, Shuah Khan wrote:
> Fix the following warn:
> 
>  net/netfilter/ipvs/ip_vs_sync.c: In function ‘ip_vs_proc_sync_conn’:
>  net/netfilter/ipvs/ip_vs_sync.c:1069:33: warning: ‘opt.init_seq’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>    struct ip_vs_sync_conn_options opt;
>                                   ^~~
>  net/netfilter/ipvs/ip_vs_sync.c:1069:33: warning: ‘opt.delta’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>  net/netfilter/ipvs/ip_vs_sync.c:1069:33: warning: ‘opt.previous_delta’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>  net/netfilter/ipvs/ip_vs_sync.c:1069:33: warning: ‘*((void *)&opt+12).init_seq’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>  net/netfilter/ipvs/ip_vs_sync.c:1069:33: warning: ‘*((void *)&opt+12).delta’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>  net/netfilter/ipvs/ip_vs_sync.c:1069:33: warning: ‘*((void *)&opt+12).previous_delta’ may be used uninitialized in this function [-Wmaybe-uninitialized]

Are you sure you put the right commit message on this patch?  The message describes a warning in ip_vs_sync.c, but the patch is for nfs4session.c.

Thanks,
Anna

> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
>  fs/nfs/nfs4session.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c
> index b629730..68e700e 100644
> --- a/fs/nfs/nfs4session.c
> +++ b/fs/nfs/nfs4session.c
> @@ -196,7 +196,7 @@ static int nfs4_slot_get_seqid(struct nfs4_slot_table  *tbl, u32 slotid,
>  static bool nfs4_slot_seqid_in_use(struct nfs4_slot_table *tbl,
>  		u32 slotid, u32 seq_nr)
>  {
> -	u32 cur_seq;
> +	u32 cur_seq = 0;
>  	bool ret = false;
>  
>  	spin_lock(&tbl->slot_tbl_lock);
>