Re: [PATCH] cgroups: fix possible use after free

[Paul Menage]

On Tue, Feb 10, 2009 at 1:31 AM, Li Zefan <lizf@xxxxxxxxxxxxxx> wrote:
> In cgroup_kill_sb(), root is freed before sb is detached from the list,
> so another sget() may find this sb and call cgroup_test_super(),
> which will access the root that has been freed.
>
> Reported-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>

Acked-by: Paul Menage <menage@xxxxxxxxxx>

Seems like the safest fix.

Paul
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