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    SubjectRe: Q, slab, kmemleak_erase() and redzone?
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    Pekka Enberg:
    > No. The pointer returned by cpu_cache_get() is not changed by
    > cache_alloc_refill(). The contents of the array might change, yes. That
    > said, we should check if objp is NULL before calling kmemleak_erase().

    To test whether objp is NULL or not is another issue.
    'ac' is changed actually. You can confirm it by inserting
    WARN_ON_ONCE(ac != cpu_cache_get(cachep));
    after cache_alloc_refill() in ____cache_alloc().

    And do you think these comments/code in cache_alloc_refill() are wrong?
    {
    :::
    x = cache_grow(cachep, flags | GFP_THISNODE, node, NULL);

    /* cache_grow can reenable interrupts, then ac could change. */
    ac = cpu_cache_get(cachep);
    :::
    }


    J. R. Okajima


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