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/setvbuf.c | 1 +
 1 file changed, 1 insertion(+)

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

diff --git a/src/stdio/setvbuf.c b/src/stdio/setvbuf.c
index a6f37fb0..b400b266 100644
--- a/src/stdio/setvbuf.c
+++ b/src/stdio/setvbuf.c
@@ -8,6 +8,7 @@
 int setvbuf(FILE *stream, char *buf, int mode, size_t size)
 {
 	SIGNAL_SAFE(0);
+	ASSERT_NOOVERLAP(stream, sizeof(*stream), buf, size);
 
 	flockfile(stream);
 
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