From 22a76dcc405e68b51ef58b0b8dbe09439eabaae0 Mon Sep 17 00:00:00 2001
From: Bryan Cantrill <bryan@joyent.com>
Date: Wed, 10 Dec 2014 16:54:26 +0000
Subject: OS-3611 lx brand: 64-bit processes should not use VAs above VA hole

---
 usr/src/uts/common/os/exec.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'usr/src/uts/common/os/exec.c')

diff --git a/usr/src/uts/common/os/exec.c b/usr/src/uts/common/os/exec.c
index d044b2a08d..cfb5c27302 100644
--- a/usr/src/uts/common/os/exec.c
+++ b/usr/src/uts/common/os/exec.c
@@ -1949,6 +1949,9 @@ exec_args(execa_t *uap, uarg_t *args, intpdata_t *intp, void **auxvpp)
 		usrstack = (char *)USRSTACK32;
 	}
 
+	if (args->maxstack != 0 && (uintptr_t)usrstack > args->maxstack)
+		usrstack = (char *)args->maxstack;
+
 	ASSERT(P2PHASE((uintptr_t)usrstack, args->stk_align) == 0);
 
 #if defined(__sparc)
-- 
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