From 92425f097dc28e9518f5608bff2fce16f9b4f0ef Mon Sep 17 00:00:00 2001
From: Robert Greenwalt <rgreenwalt@google.com>
Date: Thu, 28 Jul 2011 17:21:17 -0700
Subject: [PATCH] Don't call freeaddrinfo with a NULL ptr.

bug:5067055
Change-Id: I863dc4760a0aa449ac6298397ed571d8d9287801
---
 libc/netbsd/resolv/res_cache.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libc/netbsd/resolv/res_cache.c b/libc/netbsd/resolv/res_cache.c
index efce7dc98..20f37e106 100644
--- a/libc/netbsd/resolv/res_cache.c
+++ b/libc/netbsd/resolv/res_cache.c
@@ -1860,8 +1860,10 @@ _free_nameservers_locked(struct resolv_cache_info* cache_info)
     for (i = 0; i <= MAXNS; i++) {
         free(cache_info->nameservers[i]);
         cache_info->nameservers[i] = NULL;
-        freeaddrinfo(cache_info->nsaddrinfo[i]);
-        cache_info->nsaddrinfo[i] = NULL;
+        if (cache_info->nsaddrinfo[i] != NULL) {
+            freeaddrinfo(cache_info->nsaddrinfo[i]);
+            cache_info->nsaddrinfo[i] = NULL;
+        }
     }
 }