From 263832a455469405858797a0c0768590eed87afe Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Thu, 29 Sep 2022 08:33:35 +0200
Subject: [PATCH] std-aux: add nm_memcpy() helper for handling copy of zero
 bytes

---
 src/libnm-std-aux/nm-std-aux.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/libnm-std-aux/nm-std-aux.h b/src/libnm-std-aux/nm-std-aux.h
index 5cce1096f0..c11be14422 100644
--- a/src/libnm-std-aux/nm-std-aux.h
+++ b/src/libnm-std-aux/nm-std-aux.h
@@ -501,6 +501,17 @@ nm_memeq(const void *s1, const void *s2, size_t len)
     return nm_memcmp(s1, s2, len) == 0;
 }
 
+static inline void *
+nm_memcpy(void *restrict dest, const void *restrict src, size_t n)
+{
+    /* Workaround undefined behavior in memcpy() with NULL pointers. */
+    if (n == 0)
+        return dest;
+
+    nm_assert(src);
+    return memcpy(dest, src, n);
+}
+
 /*
  * Very similar to g_str_has_prefix() with the obvious meaning.
  * Differences: