On Mon, Feb 21, 2011 at 9:41 AM, Jan Friesse <[email protected]> wrote:
> Corrupted files may contain items with rec_size larger then g_record
> buffer and/or flt_data_size.
>
> Also g_record array size is now defined as constant.
>
> Signed-off-by: Jan Friesse <[email protected]>
> ---
>  tools/corosync-fplay.c |   10 +++++++++-
>  1 files changed, 9 insertions(+), 1 deletions(-)
>
> diff --git a/tools/corosync-fplay.c b/tools/corosync-fplay.c
> index 2ecc06a..c5f778c 100644
> --- a/tools/corosync-fplay.c
> +++ b/tools/corosync-fplay.c
> @@ -341,7 +341,9 @@ static struct printer_subsys printer_subsystems[] = {
>  static unsigned int printer_subsys_count =
>   sizeof (printer_subsystems) / sizeof (struct printer_subsys);
>
> -static unsigned int g_record[10000];
> +#define G_RECORD_SIZE  10000
> +
> +static unsigned int g_record[G_RECORD_SIZE];
>
>  /*
>  * Copy record, dealing with wrapping
> @@ -354,6 +356,12 @@ static int logsys_rec_get (int rec_idx) {
>
>        firstcopy = rec_size;
>        secondcopy = 0;
> +
> +       if (rec_size > G_RECORD_SIZE || rec_size > flt_data_size) {
> +               fprintf (stderr, "rec_size too large. Input file is probably 
> corrupted.\n");
> +               exit (EXIT_FAILURE);
> +       }
> +

As a matter of style/preference, I would have used sizeof(g_record)
instead of G_RECORD_SIZE here.  (Feel free to tell my why my choice of
preference is a bad idea, though, if there is one.  :-) ).

--
Russell Bryant
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