On 8/26/2021 9:50 AM, Borislav Petkov wrote:

On Fri, Aug 20, 2021 at 11:11:54AM -0700, Yu-cheng Yu wrote:

quoted

diff --git a/arch/x86/kernel/shstk.c b/arch/x86/kernel/shstk.c
index 5993aa8db338..7c1ca2476a5e 100644
--- a/arch/x86/kernel/shstk.c
+++ b/arch/x86/kernel/shstk.c

@@ -75,6 +75,61 @@ int shstk_setup(void)
  	return err;
  }
  
+int shstk_alloc_thread_stack(struct task_struct *tsk, unsigned long clone_flags,
+			     unsigned long stack_size)
+{
+	struct thread_shstk *shstk = &tsk->thread.shstk;
+	struct cet_user_state *state;
+	unsigned long addr;
+
+	if (!shstk->size)
+		return 0;
+
+	/*
+	 * Earlier clone() does not pass stack_size.  Use RLIMIT_STACK and

What is "earlier clone()"? >

I will make it just "clone()".

Thanks,
Yu-cheng