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From: Tejun Heo <tj@kernel.org>
To: Aristeu Rozanski <aris@redhat.com>
Cc: linux-kernel@vger.kernel.org, Li Zefan <lizefan@huawei.com>,
	Hugh Dickins <hughd@google.com>, Hillf Danton <dhillf@gmail.com>
Subject: Re: [PATCH v3 0/3] cgroup: add xattr support
Date: Tue, 17 Jul 2012 13:41:26 -0700	[thread overview]
Message-ID: <20120717204126.GE24336@google.com> (raw)
In-Reply-To: <20120702142925.795007114@napanee.usersys.redhat.com>

Hello,

On Mon, Jul 02, 2012 at 10:29:25AM -0400, Aristeu Rozanski wrote:
> This series are a refreshed version of a patchset submitted by Li Zefan back
> in march:
> 	https://lkml.org/lkml/2012/3/1/13
> 
> With Li's permission, I refreshed the patches to apply over the latest upstream
> and added the modifications suggested by others in the thread:
> - using a mount option instead of config option to enable the xattr support
> - reinitialize the list in kmem_xattrs_free()
> - renamed functions to simple_xattr_*()
> 
> Signed-off-by: Li Zefan <lizefan@huawei.com>
> Signed-off-by: Aristeu Rozanski <aris@redhat.com>

I raised this point before but I'm worried about directly exposing
kernel memory through xattr interface to userland.  Maybe it's okay as
long as !root users are kept from creating them.  I don't know.  I
really hope it used anonymous page cache instead of kmem tho.  Hugh,
would something like that be difficult?

Thanks.

-- 
tejun

  parent reply	other threads:[~2012-07-17 20:41 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-02 14:29 [PATCH v3 0/3] cgroup: add xattr support Aristeu Rozanski
2012-07-02 14:29 ` [PATCH v3 1/3] xattr: extract simple_xattr code from tmpfs Aristeu Rozanski
2012-07-03 16:53   ` [PATCH v4 " Aristeu Rozanski
2012-07-02 14:29 ` [PATCH v3 2/3] cgroup: revise how we re-populate root directory Aristeu Rozanski
2012-07-09 17:17   ` Tejun Heo
2012-07-09 17:22     ` Tejun Heo
2012-07-09 17:28       ` Tejun Heo
2012-07-10 19:27         ` Aristeu Rozanski
2012-07-17 13:56           ` Aristeu Rozanski
2012-07-17 18:38           ` Tejun Heo
2012-07-17 21:29             ` Aristeu Rozanski
2012-07-17 21:40               ` Tejun Heo
2012-07-18 14:16                 ` Aristeu Rozanski
2012-07-18 16:32                   ` Tejun Heo
2012-07-02 14:29 ` [PATCH v3 3/3] cgroup: add xattr support Aristeu Rozanski
2012-07-17 20:41 ` Tejun Heo [this message]
2012-07-18 20:02   ` [PATCH v3 0/3] " Hugh Dickins
2012-07-18 22:10     ` Tejun Heo
2012-07-19  1:11       ` Hugh Dickins
2012-07-20 17:59         ` Aristeu Rozanski
2012-07-20 18:04           ` Tejun Heo
2012-08-07 15:22             ` Aristeu Rozanski
2012-07-22 19:12           ` Hugh Dickins
2012-07-23 18:12             ` Aristeu Rozanski
2012-07-24 18:28               ` Tejun Heo
2012-07-24 21:44                 ` Aristeu Rozanski
2012-07-20 18:10         ` Tejun Heo

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