From 4b43b375b7abae22070cd86bfc26a8222233150e Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Wed, 31 Jan 2024 13:24:56 -0500
Subject: check for overlapping pointers

---
 src/stdio/setbuf.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/stdio/setbuf.c')

diff --git a/src/stdio/setbuf.c b/src/stdio/setbuf.c
index ddf38856..38072548 100644
--- a/src/stdio/setbuf.c
+++ b/src/stdio/setbuf.c
@@ -8,6 +8,7 @@ void setbuf(FILE * restrict stream, char * restrict buf)
 	SIGNAL_SAFE(0);
 
 	if (buf) {
+		ASSERT_NOOVERLAP(stream, sizeof(*stream), buf, BUFSIZ);
 		setvbuf(stream, buf, _IOFBF, BUFSIZ);
 	} else {
 		setvbuf(stream, NULL, _IONBF, 0);
-- 
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