linux-kernel - Re: [PATCH] cgroup: fix seq_show_option merge with legacy

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Message-ID: <CAGXu5jLtaEdTmX2QzgfrB=J=tWaoc3Bt_uAstep8UyKdh8v-OQ@mail.gmail.com>
Date:	Thu, 24 Sep 2015 11:35:00 -0700
From:	Kees Cook <keescook@...omium.org>
To:	Luis Henriques <luis.henriques@...onical.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Cgroups <cgroups@...r.kernel.org>,
	"# 3.4.x" <stable@...r.kernel.org>
Subject: Re: [PATCH] cgroup: fix seq_show_option merge with legacy_name

On Thu, Sep 24, 2015 at 11:33 AM, Luis Henriques
<luis.henriques@...onical.com> wrote:
> On Tue, Sep 08, 2015 at 11:30:43AM -0700, Kees Cook wrote:
>> When seq_show_option (068acf2ee776) was merged, it did not correctly
>> collide with cgroup's addition of legacy_name (3e1d2eed39d8) changes. This
>> fixes the reported name.
>>
>
> Since a068acf2ee77 ("fs: create and use seq_show_option for escaping")
> has been CC'ed to stable, shouldn't this be tagged to stable too?
>
> (This is upstream commit 61e57c0c3a37 "cgroup: fix seq_show_option
> merge with legacy_name".)

If the cgroup change when to stable also, then yes.

-Kees

>
> Cheers,
> --
> Luís
>
>> Signed-off-by: Kees Cook <keescook@...omium.org>
>> ---
>>  kernel/cgroup.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/kernel/cgroup.c b/kernel/cgroup.c
>> index a8538e443784..2cf0f79f1fc9 100644
>> --- a/kernel/cgroup.c
>> +++ b/kernel/cgroup.c
>> @@ -1342,7 +1342,7 @@ static int cgroup_show_options(struct seq_file *seq,
>>       if (root != &cgrp_dfl_root)
>>               for_each_subsys(ss, ssid)
>>                       if (root->subsys_mask & (1 << ssid))
>> -                             seq_show_option(seq, ss->name, NULL);
>> +                             seq_show_option(seq, ss->legacy_name, NULL);
>>       if (root->flags & CGRP_ROOT_NOPREFIX)
>>               seq_puts(seq, ",noprefix");
>>       if (root->flags & CGRP_ROOT_XATTR)
>> --
>> 1.9.1
>>
>>
>> --
>> Kees Cook
>> Chrome OS Security
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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-- 
Kees Cook
Chrome OS Security
--
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