From c5fabf55a03cd573ca2bb50d65d404bcbeade31e Mon Sep 17 00:00:00 2001
From: "Zheng, Gen" <gen.zheng@intel.com>
Date: Thu, 12 Apr 2018 14:04:23 +0800
Subject: [PATCH] sprintf: bug fix in sprintf implemented code

In the case that the copy sz is 0, it is unnecessary to do copy.

Signed-off-by: Zheng, Gen <gen.zheng@intel.com>
Reviewed-by: Chen, Jason Cl <jason.cj.chen@intel.com>
Reviewed-by: Yakui, Zhao <yakui.zhao@intel.com>
---
 hypervisor/lib/sprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hypervisor/lib/sprintf.c b/hypervisor/lib/sprintf.c
index 1feb113ea..119129537 100644
--- a/hypervisor/lib/sprintf.c
+++ b/hypervisor/lib/sprintf.c
@@ -634,7 +634,7 @@ static int charmem(int cmd, const char *s, int sz, void *hnd)
 				n++;
 			}
 
-		} else {
+		} else if (sz > 0) {
 			while (*s && n < sz) {
 				if (n < param->sz - param->wrtn)
 					*p = *s;