[libvirt] [PATCH v3 04/11] Helper functions for host TPM support
Daniel P. Berrange
berrange at redhat.com
Tue Apr 2 10:29:32 UTC 2013
On Tue, Apr 02, 2013 at 06:23:55AM -0400, Stefan Berger wrote:
> On 04/01/2013 04:07 PM, Corey Bryant wrote:
> >
> >
> >On 03/21/2013 11:42 AM, Stefan Berger wrote:
> >>Signed-off-by: Stefan Berger<stefanb at linux.vnet.ibm.com>
> >>
> >>+
> >>+char *
> >>+virTPMFindCancelPath(void)
> >>+{
> >>+ unsigned int idx;
> >>+ int len;
> >>+ DIR *pnp_dir;
> >>+ char path[100], *p;
> >
> >Is there any reason not to use PATH_MAX instead of 100 here?
>
> You get a compiler error then due to the function using too much
> space on the stack.
The answer to that is *NOT* to use a shorter 100 byte buffer,
but to use virAsprintf() instead of snprintf(). Never use
fixed length buffers for filepaths.
Daniel
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