From af0e52ca54959dc509c12343c7998f50082623f7 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sat, 13 Feb 2021 01:29:28 +0100
Subject: [PATCH] Kernel: Don't assert on sys$setsockopt() with unexpected
 level

Just error out with ENOPROTOOPT instead.

Found by fuzz-syscalls. :^)
---
 Kernel/Net/Socket.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Kernel/Net/Socket.cpp b/Kernel/Net/Socket.cpp
index dd581fe84f..9456a48807 100644
--- a/Kernel/Net/Socket.cpp
+++ b/Kernel/Net/Socket.cpp
@@ -99,6 +99,8 @@ KResult Socket::queue_connection_from(NonnullRefPtr<Socket> peer)
 
 KResult Socket::setsockopt(int level, int option, Userspace<const void*> user_value, socklen_t user_value_size)
 {
+    if (level != SOL_SOCKET)
+        return ENOPROTOOPT;
     ASSERT(level == SOL_SOCKET);
     switch (option) {
     case SO_SNDTIMEO: