*** libspf2-1.2.5/src/libspf2/spf_dns_resolv.c	Sat Feb 19 03:38:12 2005
--- libspf2-1.2.5/src/libspf2/spf_dns_resolv.c	Wed Jun 20 15:15:26 2007
***************
*** 144,151 ****
--- 144,163 ----
  	if (res_spec == NULL) {
  		res_state = (struct __res_state *)
  						malloc(sizeof(struct __res_state));
+ 		if (res_state == NULL) {
+ 			SPF_error("Failed to aquire res_state memory");
+ 			return NULL;
+ 		}
+ 		/* Always initialize to zero, some resolver libary may
+ 		 * try to expect an old state which will then used
+ 		 * to cleanup from this previous state - if this is garbage
+ 		 * the resolver library could raise a fault after some time ...
+ 		 */
+ 		memset((void *)res_state, 0, sizeof(struct __res_state));
+ 
  		if (res_ninit(res_state) != 0) {
  			SPF_error("Failed to call res_ninit()");
+ 			return NULL;
  		}
  		pthread_setspecific(res_state_key, (void *)res_state);
  	}