From: Alexey Dobriyan <adobriyan@gmail.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-crypto@vger.kernel.org, netdev@vger.kernel.org, ken@codelabs.ch
Subject: Re: sha512: make it work, undo percpu message schedule
Date: Fri, 13 Jan 2012 02:55:14 +0300 [thread overview]
Message-ID: <20120112235514.GA5065@p183.telecom.by> (raw)
In-Reply-To: <20120111003611.GA12257@gondor.apana.org.au>
On Wed, Jan 11, 2012 at 11:36:11AM +1100, Herbert Xu wrote:
> On Wed, Jan 11, 2012 at 03:00:40AM +0300, Alexey Dobriyan wrote:
> > commit f9e2bca6c22d75a289a349f869701214d63b5060
> > aka "crypto: sha512 - Move message schedule W[80] to static percpu area"
> > created global message schedule area.
> >
> > If sha512_update will ever be entered twice, hilarity ensures.
>
> Hmm, do you know why this happens? On the face of it this shouldn't
> be possible as preemption is disabled.
Herbert, I couldn't come up with a single scenario. :-(
But the bug is easy to reproduce.
next prev parent reply other threads:[~2012-01-12 23:55 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-11 0:00 sha512: make it work, undo percpu message schedule Alexey Dobriyan
2012-01-11 0:12 ` Alexey Dobriyan
2012-01-11 0:36 ` Herbert Xu
2012-01-12 23:55 ` Alexey Dobriyan [this message]
2012-01-13 0:19 ` Herbert Xu
2012-01-13 7:08 ` Herbert Xu
2012-01-13 10:35 ` Eric Dumazet
2012-01-13 10:41 ` Eric Dumazet
2012-01-13 10:57 ` Eric Dumazet
2012-01-13 11:33 ` Alexey Dobriyan
2012-01-13 12:34 ` Eric Dumazet
2012-01-14 18:20 ` Alexey Dobriyan
2012-01-14 18:27 ` [PATCH 1/3] " Alexey Dobriyan
2012-01-14 18:40 ` [PATCH 2/3] sha512: reduce stack usage to safe number Alexey Dobriyan
2012-01-14 19:08 ` Linus Torvalds
2012-01-14 20:41 ` Alexey Dobriyan
2012-01-14 21:14 ` Linus Torvalds
2012-01-16 9:56 ` David Laight
2012-01-16 10:20 ` Alexey Dobriyan
2012-01-16 10:23 ` Eric Dumazet
2012-01-16 11:37 ` David Laight
2012-01-17 12:03 ` Alexey Dobriyan
2012-01-18 18:02 ` [PATCH 4/3] sha512: reduce stack usage even on i386 Alexey Dobriyan
2012-01-26 2:35 ` Herbert Xu
2012-01-27 17:51 ` Alexey Dobriyan
2012-01-27 22:32 ` Herbert Xu
2012-01-30 11:10 ` Alexey Dobriyan
2012-02-03 3:34 ` Herbert Xu
2012-01-14 21:46 ` [PATCH 1/3] sha512: make it work, undo percpu message schedule Eric Dumazet
2012-01-14 21:52 ` Linus Torvalds
2012-01-14 22:00 ` Eric Dumazet
2012-01-15 1:43 ` Herbert Xu
2012-01-13 11:02 ` Steffen Klassert
2012-01-15 1:43 ` Herbert Xu
2012-01-13 11:45 ` David Laight
2012-01-13 12:35 ` Eric Dumazet
2012-01-13 6:22 ` Steffen Klassert
2012-01-13 6:46 ` Herbert Xu
2012-01-13 6:48 ` Eric Dumazet
2012-01-13 6:50 ` Herbert Xu
2012-01-13 9:45 ` David Laight
2012-01-11 1:12 ` Adrian-Ken Rueegsegger
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