linux-kernel - Re: [PATCH v2] modsign: use shred to overwrite the private key before deleting it

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Message-ID: <54C4F3BE.60600@ahsoftware.de>
Date:	Sun, 25 Jan 2015 14:46:38 +0100
From:	Alexander Holler <holler@...oftware.de>
To:	Richard Weinberger <richard.weinberger@...il.com>
CC:	Pádraig Brady <P@...igbrady.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	Michal Marek <mmarek@...e.cz>,
	David Howells <dhowells@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v2] modsign: use shred to overwrite the private key before
 deleting it

Am 25.01.2015 um 13:36 schrieb Alexander Holler:
> Am 25.01.2015 um 13:24 schrieb Alexander Holler:
>> Am 25.01.2015 um 13:08 schrieb Richard Weinberger:
>>>
>>> Or add support for the "s" chattr to major filesystems.

(...)

>> So maybe shred should first set the 's' attribute before calling unlink
>> on that file (if it doesn't already do it). I will look at it and send a
>> patch if necessary. It's at least a small bit where I can help. ;)

(...)

That currently looks like a total waste of time. Grepping the kernel for 
SECRM_FL looks like this flags isn't supported (used) by any fs.

Regards,

Alexander Holler
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