check for overlapping pointers

1 files changed, 2 insertions, 0 deletions

diff --git a/src/stdio/rename.c b/src/stdio/rename.c
index 84d0df35..9a701a1d 100644
--- a/src/stdio/rename.c
+++ b/src/stdio/rename.c
@@ -1,5 +1,6 @@
 #include <errno.h>
 #include <stdio.h>
+#include <string.h>
 #include "_stdio.h"
 #include "_syscall.h"
 
@@ -8,6 +9,7 @@
 int rename(const char *old, const char *new)
 {
 	SIGNAL_SAFE(0);
+	ASSERT_NOOVERLAP(old, strlen(old), new, strlen(new));
 	SYSCALL(rename, int, -1, old, new, 0, 0, 0, 0);
 }