path: root/recipes-core/eglibc/files/cvs-gethostbyname4-memory-leak.patch

diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/include/arpa/nameser_compat.h libc/include/arpa/nameser_compat.h
--- libc.orig/include/arpa/nameser_compat.h	2008-05-12 11:38:35.000000000 -0400
+++ libc/include/arpa/nameser_compat.h	2017-04-06 16:34:20.413823000 -0400
@@ -1,8 +1,8 @@
 #ifndef _ARPA_NAMESER_COMPAT_
 #include <resolv/arpa/nameser_compat.h>
 
-/* Picksome unused number to represent lookups of IPv4 and IPv6 (i.e.,
-   T_A and T_AAAA).  */
-#define T_UNSPEC 62321
+/* The number is outside the 16-bit RR type range and is used
+   internally by the implementation.  */
+#define T_QUERY_A_AND_AAAA 439963904
 
 #endif
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/include/resolv.h libc/include/resolv.h
--- libc.orig/include/resolv.h	2013-09-05 18:41:05.000000000 -0400
+++ libc/include/resolv.h	2017-04-06 16:33:09.853700600 -0400
@@ -48,11 +48,11 @@
 libc_hidden_proto (__res_state)
 
 int __libc_res_nquery (res_state, const char *, int, int, u_char *, int,
-		       u_char **, u_char **, int *, int *);
+		       u_char **, u_char **, int *, int *, int *);
 int __libc_res_nsearch (res_state, const char *, int, int, u_char *, int,
-			u_char **, u_char **, int *, int *);
+			u_char **, u_char **, int *, int *, int *);
 int __libc_res_nsend (res_state, const u_char *, int, const u_char *, int,
-		      u_char *, int, u_char **, u_char **, int *, int *)
+		      u_char *, int, u_char **, u_char **, int *, int *, int *)
   attribute_hidden;
 
 libresolv_hidden_proto (_sethtent)
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/gethnamaddr.c libc/resolv/gethnamaddr.c
--- libc.orig/resolv/gethnamaddr.c	2013-06-15 13:37:04.000000000 -0400
+++ libc/resolv/gethnamaddr.c	2017-04-06 16:13:44.727609300 -0400
@@ -621,7 +621,7 @@
 	buf.buf = origbuf = (querybuf *) alloca (1024);
 
 	if ((n = __libc_res_nsearch(&_res, name, C_IN, type, buf.buf->buf, 1024,
-				    &buf.ptr, NULL, NULL, NULL)) < 0) {
+				    &buf.ptr, NULL, NULL, NULL, NULL)) < 0) {
 		if (buf.buf != origbuf)
 			free (buf.buf);
 		Dprintf("res_nsearch failed (%d)\n", n);
@@ -716,12 +716,12 @@
 	buf.buf = orig_buf = (querybuf *) alloca (1024);
 
 	n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf, 1024,
-			      &buf.ptr, NULL, NULL, NULL);
+			      &buf.ptr, NULL, NULL, NULL, NULL);
 	if (n < 0 && af == AF_INET6 && (_res.options & RES_NOIP6DOTINT) == 0) {
 		strcpy(qp, "ip6.int");
 		n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf,
 				      buf.buf != orig_buf ? MAXPACKET : 1024,
-				      &buf.ptr, NULL, NULL, NULL);
+				      &buf.ptr, NULL, NULL, NULL, NULL);
 	}
 	if (n < 0) {
 		if (buf.buf != orig_buf)
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/nss_dns/dns-canon.c libc/resolv/nss_dns/dns-canon.c
--- libc.orig/resolv/nss_dns/dns-canon.c	2014-01-03 12:51:28.000000000 -0500
+++ libc/resolv/nss_dns/dns-canon.c	2017-04-06 16:11:49.654787500 -0400
@@ -62,7 +62,7 @@
     {
       int r = __libc_res_nquery (&_res, name, ns_c_in, qtypes[i],
 				 buf, sizeof (buf), &ansp.ptr, NULL, NULL,
-				 NULL);
+				 NULL, NULL);
       if (r > 0)
 	{
 	  /* We need to decode the response.  Just one question record.
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/nss_dns/dns-host.c libc/resolv/nss_dns/dns-host.c
--- libc.orig/resolv/nss_dns/dns-host.c	2017-04-06 14:03:55.000000000 -0400
+++ libc/resolv/nss_dns/dns-host.c	2017-04-06 16:12:50.319551700 -0400
@@ -190,7 +190,7 @@
   host_buffer.buf = orig_host_buffer = (querybuf *) alloca (1024);
 
   n = __libc_res_nsearch (&_res, name, C_IN, type, host_buffer.buf->buf,
-			  1024, &host_buffer.ptr, NULL, NULL, NULL);
+			  1024, &host_buffer.ptr, NULL, NULL, NULL, NULL);
   if (n < 0)
     {
       switch (errno)
@@ -225,7 +225,7 @@
 	n = __libc_res_nsearch (&_res, name, C_IN, T_A, host_buffer.buf->buf,
 				host_buffer.buf != orig_host_buffer
 				? MAXPACKET : 1024, &host_buffer.ptr,
-				NULL, NULL, NULL);
+				NULL, NULL, NULL, NULL);
 
       if (n < 0)
 	{
@@ -308,12 +308,13 @@
   u_char *ans2p = NULL;
   int nans2p = 0;
   int resplen2 = 0;
+  int ans2p_malloced = 0;
 
   int olderr = errno;
   enum nss_status status;
-  int n = __libc_res_nsearch (&_res, name, C_IN, T_UNSPEC,
+  int n = __libc_res_nsearch (&_res, name, C_IN, T_QUERY_A_AND_AAAA,
 			      host_buffer.buf->buf, 2048, &host_buffer.ptr,
-			      &ans2p, &nans2p, &resplen2);
+			      &ans2p, &nans2p, &resplen2, &ans2p_malloced);
   if (n < 0)
     {
       switch (errno)
@@ -352,6 +353,10 @@
 			  resplen2, name, pat, buffer, buflen,
 			  errnop, herrnop, ttlp);
 
+  /* Check whether ans2p was separately allocated.  */
+  if (ans2p_malloced)
+    free (ans2p);
+
   if (host_buffer.buf != orig_host_buffer)
     free (host_buffer.buf);
 
@@ -460,7 +465,7 @@
 	  strcpy (qp, "].ip6.arpa");
 	  n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR,
 				 host_buffer.buf->buf, 1024, &host_buffer.ptr,
-				 NULL, NULL, NULL);
+				 NULL, NULL, NULL, NULL);
 	  if (n >= 0)
 	    goto got_it_already;
 	}
@@ -481,14 +486,14 @@
     }
 
   n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, host_buffer.buf->buf,
-			 1024, &host_buffer.ptr, NULL, NULL, NULL);
+			 1024, &host_buffer.ptr, NULL, NULL, NULL, NULL);
   if (n < 0 && af == AF_INET6 && (_res.options & RES_NOIP6DOTINT) == 0)
     {
       strcpy (qp, "ip6.int");
       n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, host_buffer.buf->buf,
 			     host_buffer.buf != orig_host_buffer
 			     ? MAXPACKET : 1024, &host_buffer.ptr,
-			     NULL, NULL, NULL);
+			     NULL, NULL, NULL, NULL);
     }
   if (n < 0)
     {
@@ -613,7 +618,8 @@
   int have_to_map = 0;
   uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct host_data);
   buffer += pad;
-  if (__builtin_expect (buflen < sizeof (struct host_data) + pad, 0))
+  buflen = buflen > pad ? buflen - pad : 0;
+  if (__glibc_unlikely (buflen < sizeof (struct host_data)))
     {
       /* The buffer is too small.  */
     too_small:
@@ -1267,8 +1273,8 @@
      expected application behaviour.  Some of the synthesized responses
      aren't very well thought out and sometimes appear to imply that
      IPv4 responses are always answer 1, and IPv6 responses are always
-     answer 2, but that's not true (see the implementation of send_dg
-     and send_vc to see response can arrive in any order, particularly
+     answer 2, but that's not true (see the implemetnation of send_dg
+     and send_vc to see response can arrive in any order, particlarly
      for UDP). However, we expect it holds roughly enough of the time
      that this code works, but certainly needs to be fixed to make this
      a more robust implementation.
@@ -1305,12 +1311,12 @@
      ----------------------------------------------
 
      [1] If the first response is a success we return success.
-	 This ignores the state of the second answer and in fact
-	 incorrectly sets errno and h_errno to that of the second
+         This ignores the state of the second answer and in fact
+         incorrectly sets errno and h_errno to that of the second
 	 answer.  However because the response is a success we ignore
 	 *errnop and *h_errnop (though that means you touched errno on
-	 success).  We are being conservative here and returning the
-	 likely IPv4 response in the first answer as a success.
+         success).  We are being conservative here and returning the
+         likely IPv4 response in the first answer as a success.
 
      [2] If the first response is a recoverable TRYAGAIN we return
 	 that instead of looking at the second response.  The
@@ -1364,7 +1370,7 @@
       if (status != NSS_STATUS_SUCCESS && status2 != NSS_STATUS_NOTFOUND)
 	status = status2;
       /* Do not return a truncated second response (unless it was
-	 unavoidable e.g. unrecoverable TRYAGAIN).  */
+         unavoidable e.g. unrecoverable TRYAGAIN).  */
       if (status == NSS_STATUS_SUCCESS
 	  && (status2 == NSS_STATUS_TRYAGAIN
 	      && *errnop == ERANGE && *h_errnop != NO_RECOVERY))
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/nss_dns/dns-network.c libc/resolv/nss_dns/dns-network.c
--- libc.orig/resolv/nss_dns/dns-network.c	2014-01-03 12:51:28.000000000 -0500
+++ libc/resolv/nss_dns/dns-network.c	2017-04-06 16:13:18.561373600 -0400
@@ -118,18 +118,15 @@
   } net_buffer;
   querybuf *orig_net_buffer;
   int anslen;
-  char *qbuf;
   enum nss_status status;
 
   if (__res_maybe_init (&_res, 0) == -1)
     return NSS_STATUS_UNAVAIL;
 
-  qbuf = strdupa (name);
-
   net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
 
-  anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
-			       1024, &net_buffer.ptr, NULL, NULL, NULL);
+  anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
+			       1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
   if (anslen < 0)
     {
       /* Nothing found.  */
@@ -205,7 +202,7 @@
   net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
 
   anslen = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
-			      1024, &net_buffer.ptr, NULL, NULL, NULL);
+			      1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
   if (anslen < 0)
     {
       /* Nothing found.  */
@@ -398,8 +395,8 @@
 
 	case BYNAME:
 	  {
-	    char **ap = result->n_aliases++;
-	    while (*ap != NULL)
+	    char **ap;
+	    for (ap = result->n_aliases; *ap != NULL; ++ap)
 	      {
 		/* Check each alias name for being of the forms:
 		   4.3.2.1.in-addr.arpa		= net 1.2.3.4
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/res_mkquery.c libc/resolv/res_mkquery.c
--- libc.orig/resolv/res_mkquery.c	2013-09-05 18:41:05.000000000 -0400
+++ libc/resolv/res_mkquery.c	2017-04-06 16:13:56.412597600 -0400
@@ -110,6 +110,10 @@
 	int n;
 	u_char *dnptrs[20], **dpp, **lastdnptr;
 
+	if (class < 0 || class > 65535
+	    || type < 0 || type > 65535)
+	  return -1;
+
 #ifdef DEBUG
 	if (statp->options & RES_DEBUG)
 		printf(";; res_nmkquery(%s, %s, %s, %s)\n",
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/res_query.c libc/resolv/res_query.c
--- libc.orig/resolv/res_query.c	2017-04-06 14:03:55.000000000 -0400
+++ libc/resolv/res_query.c	2017-04-06 16:15:04.137842200 -0400
@@ -98,7 +98,7 @@
 __libc_res_nquerydomain(res_state statp, const char *name, const char *domain,
 			int class, int type, u_char *answer, int anslen,
 			u_char **answerp, u_char **answerp2, int *nanswerp2,
-			int *resplen2);
+			int *resplen2, int *answerp2_malloced);
 
 /*
  * Formulate a normal query, send, and await answer.
@@ -119,14 +119,15 @@
 		  u_char **answerp,	/* if buffer needs to be enlarged */
 		  u_char **answerp2,
 		  int *nanswerp2,
-		  int *resplen2)
+		  int *resplen2,
+		  int *answerp2_malloced)
 {
 	HEADER *hp = (HEADER *) answer;
 	HEADER *hp2;
 	int n, use_malloc = 0;
 	u_int oflags = statp->_flags;
 
-	size_t bufsize = (type == T_UNSPEC ? 2 : 1) * QUERYSIZE;
+	size_t bufsize = (type == T_QUERY_A_AND_AAAA ? 2 : 1) * QUERYSIZE;
 	u_char *buf = alloca (bufsize);
 	u_char *query1 = buf;
 	int nquery1 = -1;
@@ -141,7 +142,7 @@
 		printf(";; res_query(%s, %d, %d)\n", name, class, type);
 #endif
 
-	if (type == T_UNSPEC)
+	if (type == T_QUERY_A_AND_AAAA)
 	  {
 	    n = res_nmkquery(statp, QUERY, name, class, T_A, NULL, 0, NULL,
 			     query1, bufsize);
@@ -194,7 +195,7 @@
 	if (__builtin_expect (n <= 0, 0) && !use_malloc) {
 		/* Retry just in case res_nmkquery failed because of too
 		   short buffer.  Shouldn't happen.  */
-		bufsize = (type == T_UNSPEC ? 2 : 1) * MAXPACKET;
+		bufsize = (type == T_QUERY_A_AND_AAAA ? 2 : 1) * MAXPACKET;
 		buf = malloc (bufsize);
 		if (buf != NULL) {
 			query1 = buf;
@@ -224,7 +225,8 @@
 	}
 	assert (answerp == NULL || (void *) *answerp == (void *) answer);
 	n = __libc_res_nsend(statp, query1, nquery1, query2, nquery2, answer,
-			     anslen, answerp, answerp2, nanswerp2, resplen2);
+			     anslen, answerp, answerp2, nanswerp2, resplen2,
+			     answerp2_malloced);
 	if (use_malloc)
 		free (buf);
 	if (n < 0) {
@@ -316,7 +318,7 @@
 	   int anslen)		/* size of answer buffer */
 {
 	return __libc_res_nquery(statp, name, class, type, answer, anslen,
-				 NULL, NULL, NULL, NULL);
+				 NULL, NULL, NULL, NULL, NULL);
 }
 libresolv_hidden_def (res_nquery)
 
@@ -335,7 +337,8 @@
 		   u_char **answerp,
 		   u_char **answerp2,
 		   int *nanswerp2,
-		   int *resplen2)
+		   int *resplen2,
+		   int *answerp2_malloced)
 {
 	const char *cp, * const *domain;
 	HEADER *hp = (HEADER *) answer;
@@ -360,7 +363,7 @@
 	if (!dots && (cp = res_hostalias(statp, name, tmp, sizeof tmp))!= NULL)
 		return (__libc_res_nquery(statp, cp, class, type, answer,
 					  anslen, answerp, answerp2,
-					  nanswerp2, resplen2));
+					  nanswerp2, resplen2, answerp2_malloced));
 
 #ifdef DEBUG
 	if (statp->options & RES_DEBUG)
@@ -377,8 +380,9 @@
 	if (dots >= statp->ndots || trailing_dot) {
 		ret = __libc_res_nquerydomain(statp, name, NULL, class, type,
 					      answer, anslen, answerp,
-					      answerp2, nanswerp2, resplen2);
-		if (ret > 0 || trailing_dot)
+					      answerp2, nanswerp2, resplen2,
+					      answerp2_malloced);
+		if (ret > 0 || (ret == 0 && *resplen2 > 0) || trailing_dot)
 			return (ret);
 		saved_herrno = h_errno;
 		tried_as_is++;
@@ -386,12 +390,12 @@
 			answer = *answerp;
 			anslen = MAXPACKET;
 		}
-		if (answerp2
-		    && (*answerp2 < answer || *answerp2 >= answer + anslen))
+		if (answerp2 && *answerp2_malloced)
 		  {
 		    free (*answerp2);
 		    *answerp2 = NULL;
 		    *nanswerp2 = 0;
+		    *answerp2_malloced = 0;
 		  }
 	}
 
@@ -418,21 +422,20 @@
 						      class, type,
 						      answer, anslen, answerp,
 						      answerp2, nanswerp2,
-						      resplen2);
-			if (ret > 0)
+						      resplen2, answerp2_malloced);
+			if ((ret > 0) || (ret == 0 && *resplen2 > 0))
 				return (ret);
 
 			if (answerp && *answerp != answer) {
 				answer = *answerp;
 				anslen = MAXPACKET;
 			}
-			if (answerp2
-			    && (*answerp2 < answer
-				|| *answerp2 >= answer + anslen))
+			if (answerp2 && *answerp2_malloced)
 			  {
 			    free (*answerp2);
 			    *answerp2 = NULL;
 			    *nanswerp2 = 0;
+			    *answerp2_malloced = 0;
 			  }
 
 			/*
@@ -488,8 +491,9 @@
 	    && !(tried_as_is || root_on_list)) {
 		ret = __libc_res_nquerydomain(statp, name, NULL, class, type,
 					      answer, anslen, answerp,
-					      answerp2, nanswerp2, resplen2);
-		if (ret > 0)
+					      answerp2, nanswerp2, resplen2,
+					      answerp2_malloced);
+		if ((ret > 0) || (ret == 0 && *resplen2 > 0))
 			return (ret);
 	}
 
@@ -500,11 +504,12 @@
 	 * else send back meaningless H_ERRNO, that being the one from
 	 * the last DNSRCH we did.
 	 */
-	if (answerp2 && (*answerp2 < answer || *answerp2 >= answer + anslen))
+	if (answerp2 && *answerp2_malloced)
 	  {
 	    free (*answerp2);
 	    *answerp2 = NULL;
 	    *nanswerp2 = 0;
+	    *answerp2_malloced = 0;
 	  }
 	if (saved_herrno != -1)
 		RES_SET_H_ERRNO(statp, saved_herrno);
@@ -524,7 +529,7 @@
 	    int anslen)		/* size of answer */
 {
 	return __libc_res_nsearch(statp, name, class, type, answer,
-				  anslen, NULL, NULL, NULL, NULL);
+				  anslen, NULL, NULL, NULL, NULL, NULL);
 }
 libresolv_hidden_def (res_nsearch)
 
@@ -542,7 +547,8 @@
 			u_char **answerp,
 			u_char **answerp2,
 			int *nanswerp2,
-			int *resplen2)
+			int *resplen2,
+			int *answerp2_malloced)
 {
 	char nbuf[MAXDNAME];
 	const char *longname = nbuf;
@@ -584,7 +590,7 @@
 	}
 	return (__libc_res_nquery(statp, longname, class, type, answer,
 				  anslen, answerp, answerp2, nanswerp2,
-				  resplen2));
+				  resplen2, answerp2_malloced));
 }
 
 int
@@ -596,7 +602,8 @@
 	    int anslen)		/* size of answer */
 {
 	return __libc_res_nquerydomain(statp, name, domain, class, type,
-				       answer, anslen, NULL, NULL, NULL, NULL);
+				       answer, anslen, NULL, NULL, NULL, NULL,
+				       NULL);
 }
 libresolv_hidden_def (res_nquerydomain)
 
diff -Naur '--exclude=.git' '--exclude=*.pyc' '--exclude=*.py' '--exclude=*.*~' libc.orig/resolv/res_send.c libc/resolv/res_send.c
--- libc.orig/resolv/res_send.c	2017-04-06 14:03:55.000000000 -0400
+++ libc/resolv/res_send.c	2017-04-06 16:16:12.448561400 -0400
@@ -120,13 +120,13 @@
 #define MAXPACKET       65536
 #endif
 
-
+#ifdef SOCK_NONBLOCK
 #ifndef __ASSUME_SOCK_CLOEXEC
 static int __have_o_nonblock;
 #else
 # define __have_o_nonblock 0
 #endif
-
+#endif
 
 /* From ev_streams.c.  */
 
@@ -203,12 +203,12 @@
 static int		send_vc(res_state, const u_char *, int,
 				const u_char *, int,
 				u_char **, int *, int *, int, u_char **,
-				u_char **, int *, int *);
+				u_char **, int *, int *, int *);
 static int		send_dg(res_state, const u_char *, int,
 				const u_char *, int,
 				u_char **, int *, int *, int,
 				int *, int *, u_char **,
-				u_char **, int *, int *);
+				u_char **, int *, int *, int *);
 #ifdef DEBUG
 static void		Aerror(const res_state, FILE *, const char *, int,
 			       const struct sockaddr *);
@@ -360,7 +360,7 @@
 __libc_res_nsend(res_state statp, const u_char *buf, int buflen,
 		 const u_char *buf2, int buflen2,
 		 u_char *ans, int anssiz, u_char **ansp, u_char **ansp2,
-		 int *nansp2, int *resplen2)
+		 int *nansp2, int *resplen2, int *ansp2_malloced)
 {
   int gotsomewhere, terrno, try, v_circuit, resplen, ns, n;
 
@@ -565,7 +565,8 @@
 			try = statp->retry;
 			n = send_vc(statp, buf, buflen, buf2, buflen2,
 				    &ans, &anssiz, &terrno,
-				    ns, ansp, ansp2, nansp2, resplen2);
+				    ns, ansp, ansp2, nansp2, resplen2,
+				    ansp2_malloced);
 			if (n < 0)
 				return (-1);
 			if (n == 0 && (buf2 == NULL || *resplen2 == 0))
@@ -575,7 +576,7 @@
 			n = send_dg(statp, buf, buflen, buf2, buflen2,
 				    &ans, &anssiz, &terrno,
 				    ns, &v_circuit, &gotsomewhere, ansp,
-				    ansp2, nansp2, resplen2);
+				    ansp2, nansp2, resplen2, ansp2_malloced);
 			if (n < 0)
 				return (-1);
 			if (n == 0 && (buf2 == NULL || *resplen2 == 0))
@@ -665,7 +666,7 @@
 	  const u_char *buf, int buflen, u_char *ans, int anssiz)
 {
   return __libc_res_nsend(statp, buf, buflen, NULL, 0, ans, anssiz,
-			  NULL, NULL, NULL, NULL);
+			  NULL, NULL, NULL, NULL, NULL);
 }
 libresolv_hidden_def (res_nsend)
 
@@ -709,7 +710,7 @@
    are needed but ANSCP is NULL, then as much of the response as
    possible is read into the buffer, but the results will be truncated.
    When truncation happens because of a small answer buffer the DNS
-   packets header field TC will bet set to 1, indicating a truncated
+   packets header feild TC will bet set to 1, indicating a truncated
    message and the rest of the socket data will be read and discarded.
 
    Answers to the query are stored secondly in *ANSP2 up to a max of
@@ -747,7 +748,7 @@
 	const u_char *buf, int buflen, const u_char *buf2, int buflen2,
 	u_char **ansp, int *anssizp,
 	int *terrno, int ns, u_char **anscp, u_char **ansp2, int *anssizp2,
-	int *resplen2)
+	int *resplen2, int *ansp2_malloced)
 {
 	const HEADER *hp = (HEADER *) buf;
 	const HEADER *hp2 = (HEADER *) buf2;
@@ -828,7 +829,7 @@
 	 */
 	int recvresp1 = 0;
 	/* Skip the second response if there is no second query.
-	   To do that we mark the second response as received.  */
+           To do that we mark the second response as received.  */
 	int recvresp2 = buf2 == NULL;
 	uint16_t rlen16;
  read_len:
@@ -896,6 +897,8 @@
 			}
 			*thisanssizp = MAXPACKET;
 			*thisansp = newp;
+			if (thisansp == ansp2)
+			  *ansp2_malloced = 1;
 			anhp = (HEADER *) newp;
 			/* A uint16_t can't be larger than MAXPACKET
 			   thus it's safe to allocate MAXPACKET but
@@ -993,6 +996,7 @@
 
 		/* only try IPv6 if IPv6 NS and if not failed before */
 		if (nsap->sa_family == AF_INET6 && !statp->ipv6_unavail) {
+#ifdef SOCK_NONBLOCK
 			if (__builtin_expect (__have_o_nonblock >= 0, 1)) {
 				EXT(statp).nssocks[ns] =
 				  socket(PF_INET6, SOCK_DGRAM|SOCK_NONBLOCK,
@@ -1005,12 +1009,14 @@
 #endif
 			}
 			if (__builtin_expect (__have_o_nonblock < 0, 0))
+#endif
 				EXT(statp).nssocks[ns] =
 				  socket(PF_INET6, SOCK_DGRAM, 0);
 			if (EXT(statp).nssocks[ns] < 0)
 			    statp->ipv6_unavail = errno == EAFNOSUPPORT;
 			slen = sizeof (struct sockaddr_in6);
 		} else if (nsap->sa_family == AF_INET) {
+#ifdef SOCK_NONBLOCK
 			if (__builtin_expect (__have_o_nonblock >= 0, 1)) {
 				EXT(statp).nssocks[ns]
 				  = socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK,
@@ -1023,6 +1029,7 @@
 #endif
 			}
 			if (__builtin_expect (__have_o_nonblock < 0, 0))
+#endif
 				EXT(statp).nssocks[ns]
 				  = socket(PF_INET, SOCK_DGRAM, 0);
 			slen = sizeof (struct sockaddr_in);
@@ -1049,7 +1056,11 @@
 			__res_iclose(statp, false);
 			return (0);
 		}
+#ifdef SOCK_NONBLOCK
 		if (__builtin_expect (__have_o_nonblock < 0, 0)) {
+#else
+                {
+#endif
 			/* Make socket non-blocking.  */
 			int fl = __fcntl (EXT(statp).nssocks[ns], F_GETFL);
 			if  (fl != -1)
@@ -1083,7 +1094,7 @@
    are needed but ANSCP is NULL, then as much of the response as
    possible is read into the buffer, but the results will be truncated.
    When truncation happens because of a small answer buffer the DNS
-   packets header field TC will bet set to 1, indicating a truncated
+   packets header feild TC will bet set to 1, indicating a truncated
    message, while the rest of the UDP packet is discarded.
 
    Answers to the query are stored secondly in *ANSP2 up to a max of
@@ -1128,7 +1139,7 @@
 	const u_char *buf, int buflen, const u_char *buf2, int buflen2,
 	u_char **ansp, int *anssizp,
 	int *terrno, int ns, int *v_circuit, int *gotsomewhere, u_char **anscp,
-	u_char **ansp2, int *anssizp2, int *resplen2)
+	u_char **ansp2, int *anssizp2, int *resplen2, int *ansp2_malloced)
 {
 	const HEADER *hp = (HEADER *) buf;
 	const HEADER *hp2 = (HEADER *) buf2;
@@ -1165,7 +1176,7 @@
 	int nwritten = 0;
 	int recvresp1 = 0;
 	/* Skip the second response if there is no second query.
-	   To do that we mark the second response as received.  */
+           To do that we mark the second response as received.  */
 	int recvresp2 = buf2 == NULL;
 	pfd[0].fd = EXT(statp).nssocks[ns];
 	pfd[0].events = POLLOUT;
@@ -1359,6 +1370,8 @@
 			if (newp != NULL) {
 				*thisanssizp = MAXPACKET;
 				*thisansp = newp;
+				if (thisansp == ansp2)
+				  *ansp2_malloced = 1;
 			}
 		}
 		/* We could end up with truncation if anscp was NULL
@@ -1542,6 +1555,7 @@
 					retval = reopen (statp, terrno, ns);
 					if (retval <= 0)
 						return retval;
+					pfd[0].fd = EXT(statp).nssocks[ns];
 				}
 			}
 			goto wait;