linux-kernel - Re: [PATCH] PM / hibernate: Introduce snapshot test mode for hibernation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJZ5v0jfFFKs09sQC0Fq2iiL30tJxKtaie7tWCaczO+Dm3Aa+w@mail.gmail.com>
Date:	Wed, 13 Jul 2016 22:04:27 +0200
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Pavel Machek <pavel@....cz>
Cc:	Chen Yu <yu.c.chen@...el.com>, Linux PM <linux-pm@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <len.brown@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PM / hibernate: Introduce snapshot test mode for hibernation

On Wed, Jul 13, 2016 at 7:01 PM, Pavel Machek <pavel@....cz> wrote:
> Hi!
>
>> >>and then swapon the swap device, and do a testing. This should be safer?
>> >Yeah, that's the way. Read-only root is other option.
>> >
>> >>>I guess updating documentation would be welcome from my side,
>> >>>otherwise it should be ok.
>> >>OK, I'll  update the documents.
>> >Just add fat warning into the documentation.
>> OK.
>
> Actually... If you could add
>
> printk(KERN_ALERT "Hibernation image written. If you have any
> filesystems mounted read-write and attempt to resume, you'll corrupt
> your data. To prevent that, remove the hibernation image.\n")
>
> ...I guess that would save someone's filesystem. (Yes, very high
> loglevel. If you attempt to do this from anything else then singleuser
> or initrd, you are asking for problems, so... lets make sure user sees
> it.)

Please see the new version of this patch:
https://patchwork.kernel.org/patch/9226837/

Thanks,
Rafael