linux-kernel - Re: [PATCH] lkdtm/bugs: In lkdtm_HUNG_TASK() use BUG(), not BUG

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Date: Fri, 26 Jan 2024 10:30:09 -0800
From: Kees Cook <keescook@...omium.org>
To: Douglas Anderson <dianders@...omium.org>
Cc: Kees Cook <keescook@...omium.org>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lkdtm/bugs: In lkdtm_HUNG_TASK() use BUG(), not BUG_ON(1)

On Fri, 26 Jan 2024 07:28:53 -0800, Douglas Anderson wrote:
> In commit edb6538da3df ("lkdtm/bugs: Adjust lkdtm_HUNG_TASK() to avoid
> tail call optimization") we marked lkdtm_HUNG_TASK() as
> __noreturn. The compiler gets unhappy if it thinks a __noreturn
> function might return, so there's a BUG_ON(1) at the end. Any human
> can see that the function won't return and the compiler can figure
> that out too. Except when it can't.
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] lkdtm/bugs: In lkdtm_HUNG_TASK() use BUG(), not BUG_ON(1)
      https://git.kernel.org/kees/c/34b82a2fb747

Take care,

-- 
Kees Cook