--- a/hotspot/src/cpu/aarch64/vm/globals_aarch64.hpp	Wed Jul 05 22:44:47 2017 +0200
+++ b/hotspot/src/cpu/aarch64/vm/globals_aarch64.hpp	Thu Jan 26 11:47:39 2017 -0500
@@ -46,7 +46,10 @@
 
 #define DEFAULT_STACK_YELLOW_PAGES (2)
 #define DEFAULT_STACK_RED_PAGES (1)
-#define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5))
+// Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
+// stack if compiled for unix and LP64. To pass stack overflow tests we need
+// 20 shadow pages.
+#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+5))
 #define DEFAULT_STACK_RESERVED_PAGES (0)
 
 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES