From 212440dbb11e32b6e9569235fac4b197bcd12feb Mon Sep 17 00:00:00 2001
From: Jianfeng Jiang <jiangjianfeng.jjf@antgroup.com>
Date: Fri, 16 Aug 2024 06:11:22 +0000
Subject: [PATCH] Fix: mmap len cannot be zero

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

diff --git a/kernel/src/syscall/mmap.rs b/kernel/src/syscall/mmap.rs
index 4838af5bd..5e2504188 100644
--- a/kernel/src/syscall/mmap.rs
+++ b/kernel/src/syscall/mmap.rs
@@ -54,6 +54,10 @@ fn do_sys_mmap(
 
     check_option(&option)?;
 
+    if len == 0 {
+        return_errno_with_message!(Errno::EINVAL, "mmap len cannot be zero");
+    }
+
     let len = len.align_up(PAGE_SIZE);
 
     if offset % PAGE_SIZE != 0 {