# Re: \[PATCH v19 1/7\] x86/cet/ibt: Update Kconfig for user-mode Indirect Branch Tracking

- From: Kees Cook \<hidden\>
- Date: 2021-02-04 19:51:44 
- List: linux-doc
- Page: https://ratatoskr.run/linux-doc/2021/02/6259089
- Thread: https://ratatoskr.run/linux-doc/2021/02/6257808/t.md

```text
On Wed, Feb 03, 2021 at 02:58:56PM -0800, Yu-cheng Yu wrote:
> Indirect branch tracking is a hardware security feature that verifies near
> indirect call/jump instructions arrive at intended targets, which are
> labeled by the compiler with ENDBR opcodes.  If such instructions reach
> unlabeled locations, the processor raises control-protection faults.
> 
> Check the compiler is up-to-date at config time.
> 
> Signed-off-by: Yu-cheng Yu <redacted>

Reviewed-by: Kees Cook <redacted>

-- 
Kees Cook
```