commit 92425f097dc28e9518f5608bff2fce16f9b4f0ef
author Robert Greenwalt <rgreenwalt@google.com> Thu Jul 28 17:21:17 2011 -0700
committer Robert Greenwalt <rgreenwalt@google.com> Thu Jul 28 17:21:17 2011 -0700
tree 505bb4a3a57d83b9b28fac307b8e743a990db8de
parent 28de3e5901fd54208f20e027365d2ba7b7e136b6

Don't call freeaddrinfo with a NULL ptr.

bug:5067055
Change-Id: I863dc4760a0aa449ac6298397ed571d8d9287801

libc/netbsd/resolv/res_cache.c

diff --git a/libc/netbsd/resolv/res_cache.c b/libc/netbsd/resolv/res_cache.c
index efce7dc..20f37e1 100644
--- a/libc/netbsd/resolv/res_cache.c
+++ b/libc/netbsd/resolv/res_cache.c
@@ -1860,8 +1860,10 @@
     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;
+        }
     }
 }