From 42f70fd779b3cd70a784b27af491c99c6da91830 Mon Sep 17 00:00:00 2001
From: Yuke Peng <pykfirst@gmail.com>
Date: Fri, 23 Aug 2024 17:15:18 +0800
Subject: [PATCH] Fix reachable unwrap panic in `check_sem()`

---
 kernel/aster-nix/src/syscall/semget.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/aster-nix/src/syscall/semget.rs b/kernel/aster-nix/src/syscall/semget.rs
index 515a20262..9b5a99fa4 100644
--- a/kernel/aster-nix/src/syscall/semget.rs
+++ b/kernel/aster-nix/src/syscall/semget.rs
@@ -16,6 +16,9 @@ pub fn sys_semget(key: i32, nsems: i32, semflags: i32, ctx: &Context) -> Result<
     if nsems < 0 || nsems as usize > SEMMSL {
         return_errno!(Errno::EINVAL);
     }
+    if key < 0 {
+        return_errno!(Errno::EINVAL);
+    }
 
     let flags = IpcFlags::from_bits_truncate(semflags as u32);
     let mode: u16 = (semflags as u32 & 0x1FF) as u16;