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    SubjectRe: [PATCH 2/2] mm: fix NULL ptr dereference in move_pages
    On Fri, 13 Apr 2012, Sasha Levin wrote:

    > Commit 3268c63 ("mm: fix move/migrate_pages() race on task struct") has added
    > an odd construct where 'mm' is checked for being NULL, and if it is, it would
    > get dereferenced anyways by mput()ing it.

    Acked-by: Christoph Lameter <cl@linux.com>



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