Re: [PATCH] infiniband-diags: Verify timeout value specified to diagnostics

[Jay Fenlason <fenlason-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

Sorry if you get this more than once, I seem to have outgoing mail misconfiguration here.

On Wed, Dec 15, 2010 at 11:47:09AM -0800, Ira Weiny wrote:
>
> Verify timeout value specified to diagnostics
>
>
> Signed-off-by: Ira Weiny <weiny2-eSE4LqFkL++LYFxP40JT4w@public.gmane.org>
> ---
>  infiniband-diags/src/ibdiag_common.c |   10 +++++++---
>  1 files changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/infiniband-diags/src/ibdiag_common.c b/infiniband-diags/src/ibdia
+g_common.c
> index 99861f1..8ccf2fc 100644
> --- a/infiniband-diags/src/ibdiag_common.c
> +++ b/infiniband-diags/src/ibdiag_common.c
> @@ -175,9 +175,13 @@ static int process_opt(int ch, char *optarg)
>               ibd_dest_type = IB_DEST_GUID;
>               break;
>       case 't':
> -             val = strtoul(optarg, 0, 0);
> -             madrpc_set_timeout(val);
> -             ibd_timeout = val;
> +             val = (int)strtol(optarg, NULL, 0);
> +             if (val > 0) {
> +                     madrpc_set_timeout(val);
> +                     ibd_timeout = val;
> +             } else
> +                     IBERROR("Invalid timeout \"%s\".  Timeout requires a "
> +                             "positive integer value.", optarg);
>               break;
>       case 's':
>               /* srcport is not required when resolving via IB_DEST_LID */
> --
> 1.5.4.5

This only partially detects invalid timeouts.  For example, timeouts
of "123skidoo" or 1234534587347895789457897897894578978912902393 will
be accepted but will not work as expected.  To fully test the
conversion, you need to do something more like:

  long val;
  char *endp;

  ...
  errno = 0;
  val = strtol ( optarg, &endp 0 );
  if ( errno || ( endp && *endp != '\0' ) || val < 0 || val > INT_MAX ) {
        /* invalid timeout detected */
  ...

All of the tests are required to detect invalid inputs.

		-- JF
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