From b20fda2a4ada2a6462718dc661e139e6c7a29807 Mon Sep 17 00:00:00 2001
From: "Dongjia \"toka\" Zhang" <tokazerkje@outlook.com>
Date: Mon, 2 Oct 2023 06:08:29 +0200
Subject: [PATCH] Use /dev/urandom instead of /dev/null for probing valid
 memory (#1586)

---
 libafl_targets/src/cmplog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libafl_targets/src/cmplog.c b/libafl_targets/src/cmplog.c
index 7ae3a46164..fa82a4539a 100644
--- a/libafl_targets/src/cmplog.c
+++ b/libafl_targets/src/cmplog.c
@@ -60,7 +60,7 @@ static long area_is_valid(const void *ptr, size_t len) {
   valid_len = (long)len;
 #elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
   if (!dymmy_initialized) {
-    if ((dummy_fd[1] = open("/dev/null", O_WRONLY)) < 0) {
+    if ((dummy_fd[1] = open("/dev/urandom", O_WRONLY)) < 0) {
       if (pipe(dummy_fd) < 0) { dummy_fd[1] = 1; }
     }
     dymmy_initialized = 1;