From mboxrd@z Thu Jan  1 00:00:00 1970
From: hjl@varesearch.com (H.J. Lu)
To: libc-hacker@sourceware.cygnus.com (GNU C Library)
Subject: nscd and getxxxxx_r () are all screwed up.
Date: Mon, 09 Aug 1999 18:48:00 -0000
Message-id: <19990810014844.037B03FC1@varesearch.com>
X-SW-Source: 1999-08/msg00022.html

nscd and getxxxxx_r () in glibc 2.1.2 are all screwed up. hstcache.c
in nscd has:

  while (__gethostbyname2_r (key, AF_INET, &resultbuf, buffer, buflen, 
                             &hst, &h_errno) != 0
         && h_errno == NETDB_INTERNAL
         && errno == ERANGE) 
    {
      errno = 0;
      buflen += 256; 
      buffer = alloca (buflen);
    }

However, when getanswer_r in resolve/nss_dns/dns-host.c runs out of
buffer around line 619, it never bothers to set errno nor h_errno. It
does that with


	if (result->h_name == NULL)
	  {
	    ....
	  }


It is incorrect since getanswer_r can run out of memory after 
result->h_name is set. It looks like a mess to me. I hope someone
will fix it soon.


-- 
H.J. Lu (hjl@gnu.org)