silence coverity - reviewed by Evan over jabber

(cherry picked from commit e31a37787b)
This commit is contained in:
Mark Andrews
2014-07-01 09:52:02 +10:00
parent f801f870c8
commit ae67e03572

View File

@@ -240,7 +240,7 @@ isc_netaddr_prefixok(const isc_netaddr_t *na, unsigned int prefixlen) {
return (ISC_R_FAILURE);
nbytes++;
}
if (memcmp(p + nbytes, zeros, ipbytes - nbytes) != 0)
if (nbytes < ipbytes && memcmp(p + nbytes, zeros, ipbytes - nbytes) != 0)
return (ISC_R_FAILURE);
return (ISC_R_SUCCESS);
}