From 08a806e75df88aa92244ac6dec5973a4f10e302a Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Mon, 5 Jun 2023 19:15:32 +0300
Subject: [PATCH] Kernel: verify that loaded elfs are executable

---
 kernel/kernel/Process.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index ebdba27d..8c0d6c63 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -53,6 +53,12 @@ namespace Kernel
 			delete elf;
 			return BAN::Error::from_errno(EINVAL);
 		}
+		if (elf->file_header_native().e_type != LibELF::ET_EXEC)
+		{
+			derrorln("Not an executable");
+			delete elf;
+			return BAN::Error::from_errno(EINVAL);
+		}
 
 		auto* process = create_process();
 		MUST(process->m_working_directory.push_back('/'));
@@ -212,6 +218,12 @@ namespace Kernel
 			delete elf;
 			return BAN::Error::from_errno(EINVAL);
 		}
+		if (elf->file_header_native().e_type != LibELF::ET_EXEC)
+		{
+			derrorln("Not an executable");
+			delete elf;
+			return BAN::Error::from_errno(EINVAL);
+		}
 
 		LockGuard lock_guard(m_lock);