plan9port

commit 154140a22b1c697f6a3edb3e5913efded1be082a
parent 8cb7308f3a24249ed091c7decf22005c64099783
Author: Russ Cox <rsc@swtch.com>
Date:   Sun, 17 May 2020 20:06:31 -0400

mk: replace overlapping strcpy with memmove

Found by ASAN.

Diffstat:
M
src/cmd/mk/env.c
 | 
3
++-

1 file changed, 2 insertions(+), 1 deletion(-)
diff --git 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;