nscd: Switch to struct scratch_buffer in adhstaiX [BZ #18023]

The pre-allocation of the three scratch buffers increased the initial
stack size somewhat, but if retries are needed, the previous version
used more stack space if extend_alloca could not merge allocations.
Lack of alloca accounting also means could be problematic with
extremely large NSS responses, too.

	[BZ #18023]
	* nscd/aicache.c (addhstaiX): Use struct scratch_buffer instead
	of extend_alloca.

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 5b1c0315e0..1cafbb1882 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,12 @@
 2018-06-25  Florian Weimer  <fweimer@redhat.com>
 
 	[BZ #18023]
+	* nscd/aicache.c (addhstaiX): Use struct scratch_buffer instead
+	of extend_alloca.
+
+2018-06-25  Florian Weimer  <fweimer@redhat.com>
+
+	[BZ #18023]
 	* nscd/grpcache.c (addgrbyX): Use struct scratch_buffer instead
 	of extend_alloca.
 	* nscd/hstcache.c (addhstbyX): Likewise.