linux-kernel - Re: [PATCH 1/3] ptrace: ptrace_reparented() should check same_thread

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Message-ID: <20110626210823.GC16293@redhat.com>
Date:	Sun, 26 Jun 2011 23:08:23 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	vda.linux@...glemail.com, jan.kratochvil@...hat.com,
	pedro@...esourcery.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] ptrace: ptrace_reparented() should check
	same_thread_group()

On 06/25, Tejun Heo wrote:
>
> This patch involves very subtle behavior change when the tracer is
> multi-threaded && real parent of the tracee.  Slightly worrisome

Agreed. That is why, despite the fact the change itself is trivial,
the changelog is so long.

I am almost sure nobody will ever notice this change, but still this
is the user-visible change.

> but
> it is a bug fix and extremely fringe, so...

Agreed. Even if very minor, this looks like a bug, imho makes sense
to fix.

>  Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

Oleg.

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