From 7a0fdd19a0caca23fc6f591339caea829785e7b4 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Fri, 7 Feb 2025 13:06:43 -0500
Subject: [PATCH] kernel/sem: Properly handle create_sem being called with a
 negative count.

It doesn't make much sense to do this, and the Be Book specifies that
doing so will return an error. A user on the mailing list tested
against BeOS and confirmed that it does reject this, so we should too.
---
 src/system/kernel/sem.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/system/kernel/sem.cpp b/src/system/kernel/sem.cpp
index 0755a4ee77..a1b1ab7d99 100644
--- a/src/system/kernel/sem.cpp
+++ b/src/system/kernel/sem.cpp
@@ -468,6 +468,8 @@ haiku_sem_init(kernel_args *args)
 sem_id
 create_sem_etc(int32 count, const char* name, team_id owner)
 {
+	if (count < 0)
+		return B_BAD_VALUE;
 	if (!sSemsActive || sUsedSems == sMaxSems)
 		return B_NO_MORE_SEMS;