From 154140a22b1c697f6a3edb3e5913efded1be082a Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Sun, 17 May 2020 20:06:31 -0400
Subject: mk: replace overlapping strcpy with memmove

Found by ASAN.
---
 src/cmd/mk/env.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/cmd')

diff --git a/src/cmd/mk/env.c b/src/cmd/mk/env.c
index d7c6481d..e01aa21a 100644
--- a/src/cmd/mk/env.c
+++ b/src/cmd/mk/env.c
@@ -123,7 +123,8 @@ buildenv(Job *j, int slot)
 			qp = strchr(cp+1, ')');
 			if(qp){
 				*qp = 0;
-				strcpy(w->s, cp+1);
+				/* strcpy, but might overlap */
+				memmove(w->s, cp+1, strlen(cp+1)+1);
 				l = &w->next;
 				w = w->next;
 				continue;
-- 
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