From: Cyrill Gorcunov <gorcunov@openvz.org>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>,
Pavel Emelyanov <xemul@parallels.com>,
Oleg Nesterov <oleg@redhat.com>, Tejun Heo <tj@kernel.org>,
Matt Helsley <matthltc@us.ibm.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH mm RESEND] c/r: prctl: update prctl_set_mm_exe_file() after mm->num_exe_file_vmas removal
Date: Wed, 11 Apr 2012 02:59:57 +0400 [thread overview]
Message-ID: <20120410225957.GP24857@moon> (raw)
In-Reply-To: <20120407190801.10294.76053.stgit@zurg>
On Sat, Apr 07, 2012 at 11:08:02PM +0400, Konstantin Khlebnikov wrote:
> [ fix for "c-r-prctl-add-ability-to-set-new-mm_struct-exe_file-v2" from mm tree ]
>
> After removing mm->num_exe_file_vmas kernel keeps mm->exe_file until final mmput(),
> it never becomes NULL while task is alive.
>
> We can check for other mapped files in mm instead of checking mm->num_exe_file_vmas,
> and mark mm with flag MMF_EXE_FILE_CHANGED in order to forbid second changing of mm->exe_file.
>
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Hi Konstantin, really sorry for delay. This should do trick for us.
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
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WARNING: multiple messages have this Message-ID (diff)
From: Cyrill Gorcunov <gorcunov@openvz.org>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>,
Pavel Emelyanov <xemul@parallels.com>,
Oleg Nesterov <oleg@redhat.com>, Tejun Heo <tj@kernel.org>,
Matt Helsley <matthltc@us.ibm.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH mm RESEND] c/r: prctl: update prctl_set_mm_exe_file() after mm->num_exe_file_vmas removal
Date: Wed, 11 Apr 2012 02:59:57 +0400 [thread overview]
Message-ID: <20120410225957.GP24857@moon> (raw)
In-Reply-To: <20120407190801.10294.76053.stgit@zurg>
On Sat, Apr 07, 2012 at 11:08:02PM +0400, Konstantin Khlebnikov wrote:
> [ fix for "c-r-prctl-add-ability-to-set-new-mm_struct-exe_file-v2" from mm tree ]
>
> After removing mm->num_exe_file_vmas kernel keeps mm->exe_file until final mmput(),
> it never becomes NULL while task is alive.
>
> We can check for other mapped files in mm instead of checking mm->num_exe_file_vmas,
> and mark mm with flag MMF_EXE_FILE_CHANGED in order to forbid second changing of mm->exe_file.
>
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Hi Konstantin, really sorry for delay. This should do trick for us.
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
next prev parent reply other threads:[~2012-04-10 23:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-07 19:08 [PATCH mm RESEND] c/r: prctl: update prctl_set_mm_exe_file() after mm->num_exe_file_vmas removal Konstantin Khlebnikov
2012-04-07 19:08 ` Konstantin Khlebnikov
2012-04-10 22:59 ` Cyrill Gorcunov [this message]
2012-04-10 22:59 ` Cyrill Gorcunov
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