From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Pavel Emelyanov <xemul@parallels.com>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
david@lang.hm, Alexey Dobriyan <adobriyan@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrey Vagin <avagin@openvz.org>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
Glauber Costa <glommer@parallels.com>,
Andi Kleen <andi@firstfloor.org>, Tejun Heo <tj@kernel.org>,
Matt Helsley <matthltc@us.ibm.com>,
Pekka Enberg <penberg@kernel.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Vasiliy Kulikov <segoon@openwall.com>,
Andrew Morton <akpm@linux-foundation.org>,
Valdis.Kletnieks@vt.edu
Subject: Re: [RFC] syscalls, x86: Add __NR_kcmp syscall
Date: Fri, 20 Jan 2012 22:22:14 +0400 [thread overview]
Message-ID: <20120120182214.GI2786@moon> (raw)
In-Reply-To: <20120120181954.GQ1954@moon>
On Fri, Jan 20, 2012 at 10:19:54PM +0400, Cyrill Gorcunov wrote:
> On Fri, Jan 20, 2012 at 08:57:11AM -0800, H. Peter Anvin wrote:
> > On 01/20/2012 08:29 AM, Cyrill Gorcunov wrote:
> >
> > I would not worry about get_random_bytes() returning nothing... if
> > so, a lot of other places in the kernel would be broken.
> >
>
> Something like below?
>
> Cyrill
> ---
...
> +
> +static __init int kcmp_cookie_init(void)
> +{
> + int i, j;
> +
> + for (i = 0; i < KCMP_TYPES; i++) {
> + for (j = 0; j < 2; j++) {
> + get_random_bytes(&cookies[i][j],
> + sizeof(cookies[i][j]));
> + cookies[i][0] |= (~(~0UL >> 1) | 1);
Sigh, what a day. cookies[i][j]!
> + }
> + }
> +
> + return 0;
> +}
Cyrill
prev parent reply other threads:[~2012-01-20 18:22 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 14:27 [RFC] syscalls, x86: Add __NR_kcmp syscall Cyrill Gorcunov
2012-01-17 14:38 ` Alexey Dobriyan
2012-01-17 14:44 ` Cyrill Gorcunov
2012-01-17 18:47 ` H. Peter Anvin
2012-01-17 21:15 ` Cyrill Gorcunov
2012-01-17 21:40 ` Eric W. Biederman
2012-01-18 5:07 ` Pavel Emelyanov
2012-01-17 21:35 ` Eric W. Biederman
2012-01-18 8:01 ` Cyrill Gorcunov
2012-01-18 9:12 ` KOSAKI Motohiro
2012-01-18 9:19 ` Pavel Emelyanov
2012-01-18 9:23 ` KOSAKI Motohiro
2012-01-18 11:57 ` Cyrill Gorcunov
2012-01-18 16:46 ` KOSAKI Motohiro
2012-01-18 17:20 ` Cyrill Gorcunov
2012-01-18 22:05 ` david
2012-01-18 22:49 ` Cyrill Gorcunov
2012-01-18 23:29 ` Eric W. Biederman
2012-01-19 6:55 ` Cyrill Gorcunov
2012-01-20 3:16 ` Eric W. Biederman
2012-01-20 8:40 ` Cyrill Gorcunov
2012-01-20 9:02 ` Cyrill Gorcunov
2012-01-20 14:51 ` H. Peter Anvin
2012-01-20 16:29 ` Cyrill Gorcunov
2012-01-20 16:57 ` H. Peter Anvin
2012-01-20 18:19 ` Cyrill Gorcunov
2012-01-20 18:22 ` Cyrill Gorcunov [this message]
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