Silence untrusted loop bound

630
   	1. tainted_argument: Calling function dns_rdata_tostruct taints argument nsec3param.iterations. [show details]
631        result = dns_rdata_tostruct(nsec3rdata, &nsec3param, NULL);
   	2. Condition !!(result == 0), taking true branch.
   	3. Condition !!(result == 0), taking true branch.
632        RUNTIME_CHECK(result == ISC_R_SUCCESS);
633
634        dns_fixedname_init(&fixed);
   	
CID 281425 (#1 of 1): Untrusted loop bound (TAINTED_SCALAR)
4. tainted_data: Passing tainted expression nsec3param.iterations to dns_nsec3_hashname, which uses it as a loop boundary. [show details]
   	Ensure that tainted values are properly sanitized, by checking that their values are within a permissible range.
635        result = dns_nsec3_hashname(&fixed, rawhash, &rhsize, vctx->origin,
636                                    vctx->origin, nsec3param.hash,
637                                    nsec3param.iterations, nsec3param.salt,
638                                    nsec3param.salt_length);