nss: Fix UB on test-netdb

The gethostname is defined as not accepting NULL arguments, so
use a minimal size for initial call.

diff --git a/nss/test-netdb.c b/nss/test-netdb.c
index 3911c3c42aa83eb83069bc757cc16d11a6bcfb7b..b7125cfed1d2d4f86ae1dcf3f155e93fe4a0f7fd 100644 (file)
--- a/nss/test-netdb.c
+++ b/nss/test-netdb.c
@@ -178,6 +178,9 @@ test_hosts (void)
   hptr1 = gethostbyname2 ("localhost", AF_INET);
   output_hostent ("gethostbyname2 (\"localhost\", AF_INET)", hptr1);
 
+  name = xmalloc (2);
+  namelen += 2;
+
   while (gethostname (name, namelen) < 0 && errno == ENAMETOOLONG)
     {
       namelen += 2;            /* tiny increments to test a lot */