linux-kernel - Re: [PATCH] PM: hibernate: use __get_safe_page() rather than touching the list.

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Message-ID: <2023092227-underline-gave-cbef@gregkh>
Date:   Fri, 22 Sep 2023 11:28:44 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Brian Geffon <bgeffon@...gle.com>
Cc:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias Kaehlcke <mka@...omium.org>, stable@...r.kernel.org
Subject: Re: [PATCH] PM: hibernate: use __get_safe_page() rather than
 touching the list.

On Thu, Sep 21, 2023 at 01:00:45PM -0400, Brian Geffon wrote:
> We found at least one situation where the safe pages list was empty and
> get_buffer() would gladly try to use a NULL pointer.
> 
> Signed-off-by: Brian Geffon <bgeffon@...gle.com>
> Fixes: 8357376 ("swsusp: Improve handling of highmem")
> Cc: stable@...r.kernel.org
> 
> Change-Id: Ibb43a9b4ac5ff2d7e3021fdacc08e116650231e9

Please always use checkpatch.pl so that maintainers don't have to ask
you to use checkpatch.pl :(