--- src/egl/main/eglglobals.c	2026-07-31 12:37:10.386068628 +0000
+++ src/egl/main/eglglobals.c	2026-07-31 12:37:10.394068831 +0000
@@ -134,6 +134,17 @@
    if (p == NULL)
       return EGL_FALSE;
 
+   /* The zero page is never dereferenceable, and mincore() alone cannot
+    * be relied upon to say so: on Darwin, the __PAGEZERO segment is a
+    * genuine (PROT_NONE) mapping, so mincore() succeeds on it. Small
+    * integers - e.g. the wl_egl_window version field, which the Wayland
+    * platform probes with this function - must not be mistaken for
+    * dereferenceable pointers. The !HAVE_MINCORE branch below already
+    * applies this same assumption.
+    */
+   if (addr < page_size)
+      return EGL_FALSE;
+
    /* align addr to page_size */
    addr &= ~(page_size - 1);