From: "H. Peter Anvin" <hpa@zytor.com>
To: 7eggert@gmx.de
Cc: Andi Kleen <ak@suse.de>, Alon Bar-Lev <alon.barlev@gmail.com>,
Matt Domsch <Matt_Domsch@dell.com>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, johninsd@san.rr.com
Subject: Re: [PATCH] THE LINUX/I386 BOOT PROTOCOL - Breaking the 256 limit (ping)
Date: Thu, 31 Aug 2006 10:40:56 -0700 [thread overview]
Message-ID: <44F71F28.9040108@zytor.com> (raw)
In-Reply-To: <E1GIqPE-00010E-P2@be1.lrz>
Bodo Eggert wrote:
> Andi Kleen <ak@suse.de> wrote:
>> On Wednesday 30 August 2006 20:59, H. Peter Anvin wrote:
>>> Alon Bar-Lev wrote:
>
>>>> This is not entirely true...
>>>> All architectures sets saved_command_line variable...
>>>> So I can add __init to the saved_command_line and
>>>> copy its contents into kmalloced persistence_command_line at
>>>> main.c.
>>>>
>>> My opinion is that you should change saved_command_line (which already
>>> implies a copy) to be the kmalloc'd version and call the fixed-sized
>>> buffer something else.
>> It might be safer to rename everything. Then all users could be caught
>> and audited. This would ensure saved_command_line is not accessed
>> before the kmalloc'ed copy exists.
>
> If you set the new *saved_cmdline=saved_cmdline_init, the users don't need
> to be adjusted at all, and you won't have trouble with code that may be
> run before or after kmallocking (if it exists).
True for C code, but not for assembly.
-hpa
next prev parent reply other threads:[~2006-08-31 17:41 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6OyEf-3Zm-5@gated-at.bofh.it>
[not found] ` <6PCwg-3mz-43@gated-at.bofh.it>
[not found] ` <6PDBU-5Qb-25@gated-at.bofh.it>
[not found] ` <6PDBU-5Qb-23@gated-at.bofh.it>
2006-08-31 17:32 ` [PATCH] THE LINUX/I386 BOOT PROTOCOL - Breaking the 256 limit (ping) Bodo Eggert
2006-08-31 17:40 ` H. Peter Anvin [this message]
2006-05-05 13:37 [PATCH][TAKE 4] THE LINUX/I386 BOOT PROTOCOL - Breaking the 256 limit Alon Bar-Lev
2006-05-05 21:57 ` H. Peter Anvin
2006-05-06 3:57 ` John Coffman
2006-05-06 5:11 ` H. Peter Anvin
[not found] ` <44AD583B.5040007@gmail.com>
[not found] ` <44AD5BB4.9090005@zytor.com>
[not found] ` <44AD5D47.8010307@gmail.com>
[not found] ` <44AD5FD8.6010307@zytor.com>
[not found] ` <9e0cf0bf0608031436x19262ab0rb2271b52ce75639d@mail.gmail.com>
[not found] ` <44D278D6.2070106@zytor.com>
[not found] ` <9e0cf0bf0608031542q2da20037h828f4b8f0d01c4d5@mail.gmail.com>
[not found] ` <44D27F22.4080205@zytor.com>
2006-08-25 23:57 ` [PATCH] THE LINUX/I386 BOOT PROTOCOL - Breaking the 256 limit (ping) Alon Bar-Lev
2006-08-27 18:28 ` Andi Kleen
2006-08-27 18:50 ` H. Peter Anvin
2006-08-27 19:16 ` Andi Kleen
2006-08-27 19:32 ` H. Peter Anvin
2006-08-27 20:54 ` Andi Kleen
2006-08-27 21:39 ` H. Peter Anvin
2006-08-28 3:28 ` John Coffman
2006-08-28 6:02 ` Alon Bar-Lev
2006-08-28 6:41 ` Alon Bar-Lev
2006-08-28 7:31 ` H. Peter Anvin
2006-08-28 12:19 ` Alon Bar-Lev
2006-08-28 18:28 ` H. Peter Anvin
2006-08-28 18:46 ` Matt Domsch
2006-08-28 19:00 ` H. Peter Anvin
2006-08-28 20:12 ` Matt Domsch
2006-08-28 20:29 ` Alon Bar-Lev
2006-08-28 20:33 ` H. Peter Anvin
2006-08-28 20:43 ` H. Peter Anvin
2006-08-30 16:49 ` Alon Bar-Lev
2006-08-30 16:56 ` Andi Kleen
2006-08-30 17:06 ` Alon Bar-Lev
2006-08-30 17:31 ` Andi Kleen
2006-08-30 17:51 ` Alon Bar-Lev
2006-08-30 18:59 ` H. Peter Anvin
2006-08-30 19:06 ` Andi Kleen
2006-08-30 19:07 ` H. Peter Anvin
2006-08-30 19:23 ` Alon Bar-Lev
2006-08-30 19:33 ` H. Peter Anvin
2006-08-30 18:58 ` H. Peter Anvin
2006-08-28 19:24 ` Alon Bar-Lev
2006-08-28 20:32 ` H. Peter Anvin
2006-08-27 19:59 ` Alon Bar-Lev
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