linux-kernel - Re: [PATCH] elf_core_dump: use rcu_read_lock() to access ->real

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Message-ID: <7146.1240998403@redhat.com>
Date:	Wed, 29 Apr 2009 10:46:43 +0100
From:	David Howells <dhowells@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	dhowells@...hat.com, kpm@...hat.com,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] elf_core_dump: use rcu_read_lock() to access ->real_parent

Oleg Nesterov <oleg@...hat.com> wrote:

> (on top of ptrace-s-parent-real_parent-in-binfmt_elf_fdpicc.patch)
> 
> In theory it is not safe to dereference ->parent/real_parent without
> tasklist or rcu lock, we can race with re-parenting.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Acked-by: David Howells <dhowells@...hat.com>
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