Possible patch for memory leak in rlm_wimax

[Alan DeKok]

James Ballantine wrote:
> We are seeing what I think may be a memory leak inside the rlm_wimax
> module: Several HMAC_CTX structures are initialised with
> HMAC_CTX_init(), but only the last one seems to be cleaned up with
> HMAC_CTX_cleanup().

  That looks right.  The extra calls to HMAC_CTX_init() aren't necessary.

> I've attached a patch which removes the memory leak according to my
> tests. However, I don't know if my change is correct - whether a single
> HMAC_CTX should be re-used (as I've done in this patch), or whether a
> new one should be created and cleaned up for each use. I would
> appreciate it if someone with more familiarity than me could review this
> change.

  The same context can be used for every HMAC.

  I'll apply a patch.

  Alan DeKok.