From 9a299b68f0037d21c730e56057f5393c12d32388 Mon Sep 17 00:00:00 2001
From: Chen Chengjun <chenchengjun.ccj@antgroup.com>
Date: Wed, 31 Jul 2024 15:36:35 +0800
Subject: [PATCH] Make the behavior of sys_execve be consistent with Linux

---
 kernel/aster-nix/src/syscall/execve.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/aster-nix/src/syscall/execve.rs b/kernel/aster-nix/src/syscall/execve.rs
index 3365ad1ec..5eecab1c8 100644
--- a/kernel/aster-nix/src/syscall/execve.rs
+++ b/kernel/aster-nix/src/syscall/execve.rs
@@ -159,6 +159,10 @@ fn read_cstring_vec(
     max_string_len: usize,
 ) -> Result<Vec<CString>> {
     let mut res = Vec::new();
+    // On Linux, argv pointer and envp pointer can be specified as NULL.
+    if array_ptr == 0 {
+        return Ok(res);
+    }
     let mut read_addr = array_ptr;
     let mut find_null = false;
     for _ in 0..max_string_number {