Re: [PATCH] cifs: set domainName when a domain-key is used in multiuser

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Tentatively merged into cifs-2.6.git for-next pending testing and any
additional review comments

On Wed, Aug 21, 2019 at 5:10 PM Ronnie Sahlberg <lsahlber@xxxxxxxxxx> wrote:
>
> RHBZ: 1710429
>
> When we use a domain-key to authenticate using multiuser we must also set
> the domainnmame for the new volume as it will be used and passed to the server
> in the NTLMSSP Domain-name.
>
> Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
> ---
>  fs/cifs/connect.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
> index a15a6e738eb5..6f5c3ef327bd 100644
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -2981,6 +2981,7 @@ static int
>  cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
>  {
>         int rc = 0;
> +       int is_domain = 0;
>         const char *delim, *payload;
>         char *desc;
>         ssize_t len;
> @@ -3028,6 +3029,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
>                         rc = PTR_ERR(key);
>                         goto out_err;
>                 }
> +               is_domain = 1;
>         }
>
>         down_read(&key->sem);
> @@ -3085,6 +3087,26 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
>                 goto out_key_put;
>         }
>
> +       /*
> +        * If we have a domain key then we must set the domainName in the
> +        * for the request.
> +        */
> +       if (is_domain && ses->domainName) {
> +               vol->domainname = kstrndup(ses->domainName,
> +                                          strlen(ses->domainName),
> +                                          GFP_KERNEL);
> +               if (!vol->domainname) {
> +                       cifs_dbg(FYI, "Unable to allocate %zd bytes for "
> +                                "domain\n", len);
> +                       rc = -ENOMEM;
> +                       kfree(vol->username);
> +                       vol->username = NULL;
> +                       kfree(vol->password);
> +                       vol->password = NULL;
> +                       goto out_key_put;
> +               }
> +       }
> +
>  out_key_put:
>         up_read(&key->sem);
>         key_put(key);
> --
> 2.13.6
>


-- 
Thanks,

Steve



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