Author: ume
Date: Thu Dec 17 16:09:15 2015
New Revision: 292404
URL: https://svnweb.freebsd.org/changeset/base/292404
Log:
MFC r292059:
The calls to RES_SET_H_ERRNO() macro on error paths wind up
dereferencing an uninitialized res.
PR: 202142
Submitted by: Sean Boudreau
Modified:
stable/9/lib/libc/net/getaddrinfo.c
Directory Properties:
stable/9/lib/libc/ (props changed)
Modified: stable/9/lib/libc/net/getaddrinfo.c
==============================================================================
--- stable/9/lib/libc/net/getaddrinfo.c Thu Dec 17 16:08:28 2015
(r292403)
+++ stable/9/lib/libc/net/getaddrinfo.c Thu Dec 17 16:09:15 2015
(r292404)
@@ -2202,6 +2202,8 @@ _dns_getaddrinfo(void *rv, void *cb_data
memset(&sentinel, 0, sizeof(sentinel));
cur = &sentinel;
+ res = __res_state();
+
buf = malloc(sizeof(*buf));
if (!buf) {
RES_SET_H_ERRNO(res, NETDB_INTERNAL);
@@ -2248,7 +2250,6 @@ _dns_getaddrinfo(void *rv, void *cb_data
return NS_UNAVAIL;
}
- res = __res_state();
if ((res->options & RES_INIT) == 0 && res_ninit(res) == -1) {
RES_SET_H_ERRNO(res, NETDB_INTERNAL);
free(buf);
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