Serge E. Hallyn wrote:
> In do_exit(), the exit_task_namespaces() was placed after
> exit_notify() because exit_notify ends up using the pid
> namespace both to access the reaper, and for detaching the
> pid. However, this placement allows an nfs server to reap
> the task before exit_task_namespaces() completes.
>
> This patch moves the exit_task_namespaces() into release_task,
> below release_thread() which puts the pids(), and just above
> the call_rcu(delayed_put_task_struct). I believe this should
> solve both problems.
>
> Signed-off-by: Serge E. Hallyn <[email protected]>
I've run some tests on x86 and x86_64: mounted a NFS share after
having unshare(CLONE_NEWNS) and I didn't reproduce the bug Daniel
had found.
it looks safe.
C.
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