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    SubjectRe: [PATCH mm] fix i386 get_gate_vma oops
    Hugh Dickins wrote:
    > Fix oops from i386-make-compat_vdso-runtime-selectable.patch.
    >
    > Even mingetty at system startup finds it easy to trigger an oops
    > while reading /proc/PID/maps: though it has a good hold on the mm
    > itself, that cannot stop exit_mm() from resetting tsk->mm to NULL.
    >
    > (It is usually show_map()'s call to get_gate_vma() which oopses,
    > and I expect we could change that to check priv->tail_vma instead;
    > but no matter, even m_start()'s call just after get_task_mm() is racy.)
    >
    > Signed-off-by: Hugh Dickins <hugh@veritas.com>
    >
    Hm, OK.

    Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>

    J
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