[PATCH COMMITTED] getaddrinfo: Release resolver context on error in gethosts [BZ #21885]

[Florian Weimer]

2017-08-03  Florian Weimer  <fweimer@redhat.com>

	[BZ #21885]
	* sysdeps/posix/getaddrinfo.c (gethosts): Release resolver context
	on memory allocation failure.

diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index efa7118..699411c 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -255,6 +255,8 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
       break;								      \
     if (!scratch_buffer_grow (tmpbuf))					      \
       {									      \
+	__resolv_context_enable_inet6 (res_ctx, res_enable_inet6);	      \
+	__resolv_context_put (res_ctx);					      \
 	result = -EAI_MEMORY;						      \
 	goto free_and_return;						      \
       }									      \