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    SubjectRe: [PATCH 1/4] mm: Fix invalid page pointer returned with FOLL_PIN gups
    On Sun, Jan 30, 2022 at 09:17:49PM -0800, John Hubbard wrote:
    > From: Peter Xu <peterx@redhat.com>
    >
    > Alex reported invalid page pointer returned with pin_user_pages_remote() from
    > vfio after upstream commit 4b6c33b32296 ("vfio/type1: Prepare for batched
    > pinning with struct vfio_batch"). This problem breaks NVIDIA vfio mdev.

    I haven't actually seen any nvidia mdev module in the tree.

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