From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH mm] fix i386 get_gate_vma oops
Date: Fri, 13 Apr 2007 10:21:17 -0700 [thread overview]
Message-ID: <461FBC0D.5060603@goop.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0704131714160.3687@blonde.wat.veritas.com>
Hugh Dickins wrote:
> Fix oops from i386-make-compat_vdso-runtime-selectable.patch.
>
> Even mingetty at system startup finds it easy to trigger an oops
> while reading /proc/PID/maps: though it has a good hold on the mm
> itself, that cannot stop exit_mm() from resetting tsk->mm to NULL.
>
> (It is usually show_map()'s call to get_gate_vma() which oopses,
> and I expect we could change that to check priv->tail_vma instead;
> but no matter, even m_start()'s call just after get_task_mm() is racy.)
>
> Signed-off-by: Hugh Dickins <hugh@veritas.com>
>
Hm, OK.
Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
J
prev parent reply other threads:[~2007-04-13 17:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-13 16:19 [PATCH mm] fix i386 get_gate_vma oops Hugh Dickins
2007-04-13 17:21 ` Jeremy Fitzhardinge [this message]
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