Re: [PATCH] CIFS: Fix incorrect max RFC1002 write size value

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Is there a recreation scenario for this.  Your change makes sense but
is it possible to hit?

On Fri, Oct 7, 2011 at 2:05 PM, Pavel Shilovsky <piastry@xxxxxxxxxxx> wrote:
> ..the length field has only 17 bits.
>
> Signed-off-by: Pavel Shilovsky <piastry@xxxxxxxxxxx>
> ---
>  fs/cifs/connect.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
> index 633c246..5779002 100644
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -2807,10 +2807,10 @@ void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
>
>  /*
>  * When the server doesn't allow large posix writes, only allow a wsize of
> - * 128k minus the size of the WRITE_AND_X header. That allows for a write up
> + * 2^17-1 minus the size of the WRITE_AND_X header. That allows for a write up
>  * to the maximum size described by RFC1002.
>  */
> -#define CIFS_MAX_RFC1002_WSIZE (128 * 1024 - sizeof(WRITE_REQ) + 4)
> +#define CIFS_MAX_RFC1002_WSIZE (128 * 1024 - 1 - sizeof(WRITE_REQ) + 4)
>
>  /*
>  * The default wsize is 1M. find_get_pages seems to return a maximum of 256
> --
> 1.7.1
>
> --
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-- 
Thanks,

Steve
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