linux-kernel - Re: [PATCH][cifs-next] cifs: ensure variable rc is initialized at the after

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Date:   Wed, 28 Aug 2019 22:59:57 -0500
From:   Steve French <smfrench@...il.com>
To:     Colin King <colin.king@...onical.com>,
        ronnie sahlberg <ronniesahlberg@...il.com>
Cc:     Steve French <sfrench@...ba.org>,
        CIFS <linux-cifs@...r.kernel.org>,
        samba-technical <samba-technical@...ts.samba.org>,
        kernel-janitors <kernel-janitors@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][cifs-next] cifs: ensure variable rc is initialized at the
 after_open label

Merged into cifs-2.6.git for-next

Ronnie,
You ok with merging this as a distinct patch?

On Wed, Aug 28, 2019 at 7:02 PM Colin King <colin.king@...onical.com> wrote:
>
> From: Colin Ian King <colin.king@...onical.com>
>
> A previous fix added a jump to after_open which now leaves variable
> rc in a uninitialized state. A couple of the cases in the following
> switch statement do not set variable rc, hence the error check on rc
> at the end of the switch statement is reading a garbage value in rc
> for those specific cases. Fix this by initializing rc to zero before
> the switch statement.
>
> Fixes: 955a9c5b39379 ("cifs: create a helper to find a writeable handle by path name")
> Addresses-Coverity: ("Uninitialized scalar variable")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  fs/cifs/smb2inode.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
> index 70342bcd89b4..939fc7b2234c 100644
> --- a/fs/cifs/smb2inode.c
> +++ b/fs/cifs/smb2inode.c
> @@ -116,6 +116,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
>         smb2_set_next_command(tcon, &rqst[num_rqst]);
>   after_open:
>         num_rqst++;
> +       rc = 0;
>
>         /* Operation */
>         switch (command) {
> --
> 2.20.1
>


-- 
Thanks,

Steve