From 518798f64e313a2d9067a52b6a3d5970c8208ae5 Mon Sep 17 00:00:00 2001
From: 4lDO2 <4lDO2@protonmail.com>
Date: Fri, 18 Jul 2025 21:50:01 +0200
Subject: [PATCH] Return EINVAL when killing with sig > 64.

---
 redox-rt/src/sys.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/redox-rt/src/sys.rs b/redox-rt/src/sys.rs
index 0d060262b9..14662331d7 100644
--- a/redox-rt/src/sys.rs
+++ b/redox-rt/src/sys.rs
@@ -50,6 +50,10 @@ pub fn posix_write(fd: usize, buf: &[u8]) -> Result<usize> {
 }
 #[inline]
 pub fn posix_kill(target: ProcKillTarget, sig: usize) -> Result<()> {
+    if sig > 64 {
+        return Err(Error::new(EINVAL));
+    }
+
     match wrapper(false, true, || {
         this_proc_call(
             &mut [],
@@ -195,6 +199,11 @@ pub fn sys_waitpid(target: WaitpidTarget, status: &mut usize, flags: WaitFlags)
     })
 }
 pub fn posix_kill_thread(thread_fd: usize, signal: u32) -> Result<()> {
+    // TODO: don't hardcode?
+    if signal > 64 {
+        return Err(Error::new(EINVAL));
+    }
+
     match wrapper(false, true, || {
         thread_call(
             thread_fd,