linux-kernel - Re: [PATCH] CIFS: fix structurally dead code in smb311_posix

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Date:   Thu, 21 Jun 2018 11:59:10 -0500
From:   Steve French <smfrench@...il.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Aurelien Aptel <aaptel@...e.com>, Steve French <sfrench@...ba.org>,
        CIFS <linux-cifs@...r.kernel.org>,
        samba-technical <samba-technical@...ts.samba.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] CIFS: fix structurally dead code in smb311_posix_mkdir

Folded this patch and the equivalent one from Dan in with the comments
from Aurelien  into one patch and repushed to cifs-2.6.git for-next -
see attached.

On Thu, Jun 21, 2018 at 8:35 AM, Gustavo A. R. Silva
<gustavo@...eddedor.com> wrote:
> Code at line: 1950: rc = -EIO; is unreachable. Hence, the function
> returns rc with a value of zero and, this is not the actual intention
> of this particular piece of code.
>
> Fix this by placing the goto instruction just after the update to rc.
>
> Addresses-Coverity-ID: 1470124 ("Structurally dead code")
> Fixes: 5539e9b24a38 ("CIFS: fix memory leak and remove dead code")
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---
>  fs/cifs/smb2pdu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
> index 062a2a5..c9489b1 100644
> --- a/fs/cifs/smb2pdu.c
> +++ b/fs/cifs/smb2pdu.c
> @@ -1946,8 +1946,8 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
>         if (ses && (ses->server))
>                 server = ses->server;
>         else {
> -               goto err_free_path;
>                 rc = -EIO;
> +               goto err_free_path;
>         }
>
>         /* resource #2: request */
> --
> 2.7.4
>
> --
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-- 
Thanks,

Steve

View attachment "0001-CIFS-fix-memory-leak-and-remove-dead-code.patch" of type "text/x-patch" (5293 bytes)