Require CLONE_VM for CLONE_SIGHAND and CLONE_SIGHAND for CLONE_THREAD

kenardi · Jan 22, 2018 · d6a44b6 · d6a44b6
1 parent 56f7d13
commit d6a44b6
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/kernel/fork.c b/kernel/fork.c
@@ -121,6 +121,11 @@ dword_t sys_clone(dword_t flags, addr_t stack, addr_t ptid, addr_t tls, addr_t c
     if (stack != 0)
         TODO("clone with nonzero stack");
         // stack = current->cpu.esp;
+
+    if (flags & CLONE_SIGHAND_ && !(flags & CLONE_VM_))
+        return _EINVAL;
+    if (flags & CLONE_THREAD_ && !(flags & CLONE_SIGHAND_))
+        return _EINVAL;
 
     struct task *task = task_create(current);
     if (task == NULL)