From 6eed92dfd4da1f9979831bec8e0dcdee33fb53b4 Mon Sep 17 00:00:00 2001
From: Jeremy Allison <jra@samba.org>
Date: Fri, 23 Mar 2007 17:00:00 +0000
Subject: [PATCH] r21947: Fix the equivalent of memcpy(x, x, 16). Found by
 valgrind on the build farm. Jeremy.

---
 source/libsmb/credentials.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/libsmb/credentials.c b/source/libsmb/credentials.c
index 76fc5fc0621..3243719d5c9 100644
--- a/source/libsmb/credentials.c
+++ b/source/libsmb/credentials.c
@@ -101,7 +101,9 @@ static void creds_init_64(struct dcinfo *dc,
 	unsigned char sum2[8];
 
 	/* Just in case this isn't already there */
-	memcpy(dc->mach_pw, mach_pw, 16);
+	if (dc->mach_pw != mach_pw) {
+		memcpy(dc->mach_pw, mach_pw, 16);
+	}
 
 	sum[0] = IVAL(clnt_chal_in->data, 0) + IVAL(srv_chal_in->data, 0);
 	sum[1] = IVAL(clnt_chal_in->data, 4) + IVAL(srv_chal_in->data, 4);