Re: [PATCH v6 1/6] mm/memfd: add F_SEAL_EXEC

[Kees Cook]

On Wed, Dec 07, 2022 at 03:49:34PM +0000, jeffxu@xxxxxxxxxxxx wrote:
> From: Daniel Verkamp <dverkamp@xxxxxxxxxxxx>
> 
> The new F_SEAL_EXEC flag will prevent modification of the exec bits:
> written as traditional octal mask, 0111, or as named flags, S_IXUSR |
> S_IXGRP | S_IXOTH. Any chmod(2) or similar call that attempts to modify
> any of these bits after the seal is applied will fail with errno EPERM.
> 
> This will preserve the execute bits as they are at the time of sealing,
> so the memfd will become either permanently executable or permanently
> un-executable.
> 
> Signed-off-by: Daniel Verkamp <dverkamp@xxxxxxxxxxxx>
> Co-developed-by: Jeff Xu <jeffxu@xxxxxxxxxx>
> Signed-off-by: Jeff Xu <jeffxu@xxxxxxxxxx>

It looks like my Reviewed-by: tag was dropped?

https://lore.kernel.org/lkml/202212021443.0F684E33@keescook/

This patch is unchanged, so please carry forward any review/ack/tested
tags, etc.

But for the bots:

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook