linux-hardening - Re: [PATCH] PM: hibernate: Don't ignore return from set_memory

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Date: Sun, 18 Feb 2024 01:06:58 -0800
From: Kees Cook <keescook@...omium.org>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	"linux-hardening @ vger . kernel . org" <linux-hardening@...r.kernel.org>
Subject: Re: [PATCH] PM: hibernate: Don't ignore return from set_memory_ro()

On Sun, Feb 18, 2024 at 09:40:58AM +0100, Christophe Leroy wrote:
> set_memory_ro() and set_memory_rw() can fail, leaving memory
> unprotected.
> 
> Take the returned value into account and abort in case of
> failure.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>

More set_memory* consumers! :) Error paths look good to me.

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook