From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: pageexec@freemail.hu
Cc: "Larry H." <research@subreption.com>, Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>,
linux-mm@kvack.org, Ingo Molnar <mingo@redhat.com>,
linux-crypto@vger.kernel.org,
Pekka Enberg <penberg@cs.helsinki.fi>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [patch 5/5] Apply the PG_sensitive flag to the CryptoAPI subsystem
Date: Sun, 31 May 2009 11:34:04 +0100 [thread overview]
Message-ID: <20090531113404.5051114d@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <4A225887.21178.1C8AE762@pageexec.freemail.hu>
> > Also, there's no discussion about long-lived threads keeping
> > sensitive information in there kernel stack indefinitely.
>
> kernel stack clearing isn't hard to do, just do it on every syscall exit
> and in the infinite loop for kernel threads.
Actually that is probably not as important. In most cases you would be
leaking data between syscalls made by the same thread.
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prev parent reply other threads:[~2009-05-31 10:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-20 19:05 Larry H.
2009-05-30 18:05 ` Ingo Molnar
2009-05-31 10:14 ` pageexec
2009-05-31 10:34 ` Alan Cox [this message]
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