From a8bb80622894077537ef88b1dab0e80c62cc3984 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Sat, 16 May 2015 20:10:23 +0100
Subject: [PATCH] setbrk: but don't wipe shrinks of the stack!

---
 Applications/V7/cmd/sh/setbrk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Applications/V7/cmd/sh/setbrk.c b/Applications/V7/cmd/sh/setbrk.c
index fe1b31a7..14a58b0f 100644
--- a/Applications/V7/cmd/sh/setbrk.c
+++ b/Applications/V7/cmd/sh/setbrk.c
@@ -16,7 +16,7 @@ void *setbrk(intptr_t incr)
 {
 	uint8_t *a = sbrk(incr);
 	brkend = a + incr;
-	if (a != (uint8_t *)-1)
+	if (a != (uint8_t *)-1 && incr > 0)
 		memset(a, 0, incr);
 	return a;
 }
-- 
2.34.1