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diff --git a/os/access.c b/os/access.c
index 28f2d32..fe6e831 100644
--- a/os/access.c
+++ b/os/access.c
@@ -1390,14 +1390,23 @@ InvalidHost(register struct sockaddr *saddr, int len, ClientPtr client)
else
return 0;
}
+
+ /* An empty address requires both a NULL addr *and* a zero length
+ * as the address comparison functions call memcmp with both
+ * parameters. Make sure they agree here
+ */
+ if (addr == NULL)
+ len = 0;
+ if (len == 0)
+ addr = NULL;
for (host = validhosts; host; host = host->next) {
if (host->family == FamilyServerInterpreted) {
- if (addr && siAddrMatch(family, addr, len, host, client)) {
+ if (siAddrMatch(family, addr, len, host, client)) {
return 0;
}
}
else {
- if (addr && addrEqual(family, addr, len, host))
+ if (addrEqual(family, addr, len, host))
return 0;
}
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