linux-kernel - Re: [PATCH] Simplify PTRACE_foo constants and PTRACE

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Date:	Thu, 8 Sep 2011 20:37:08 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Denys Vlasenko <vda.linux@...glemail.com>
Cc:	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Simplify PTRACE_foo constants and PTRACE_SETOPTIONS
	code

On 09/08, Denys Vlasenko wrote:
>
> On Thu, Sep 8, 2011 at 2:06 AM, Tejun Heo <tj@...nel.org> wrote:
> > And it would be great if it explains what the historical bug was and
> > what the intended behavior is.

ptrace_setoptions() always changes ->ptrace, even if it returns
-EINVAL later.

> I'd rather nuke the bug in a follow-up patch (by deleting this line).

Denys, I think it would be much better to send 1/2 which fixes this oddity.

And note that this patch is wrong, I'll comment v3.

Oleg.

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