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    Subject[PATCH AUTOSEL for 4.9 155/219] vfio/spapr_tce: Check kzalloc() return when preregistering memory
    Date
    From: Alexey Kardashevskiy <aik@ozlabs.ru>

    [ Upstream commit 3393af24b665cb0aea7353b05e522b03ab1e7d73 ]

    This adds missing checking for kzalloc() return value.

    Fixes: 4b6fad7097f8 ("powerpc/mm/iommu, vfio/spapr: Put pages on VFIO container shutdown")
    Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
    Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
    Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    ---
    drivers/vfio/vfio_iommu_spapr_tce.c | 5 +++++
    1 file changed, 5 insertions(+)

    diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
    index 87ad0d72d8a9..70c748a5fbcc 100644
    --- a/drivers/vfio/vfio_iommu_spapr_tce.c
    +++ b/drivers/vfio/vfio_iommu_spapr_tce.c
    @@ -195,6 +195,11 @@ static long tce_iommu_register_pages(struct tce_container *container,
    return ret;

    tcemem = kzalloc(sizeof(*tcemem), GFP_KERNEL);
    + if (!tcemem) {
    + mm_iommu_put(container->mm, mem);
    + return -ENOMEM;
    + }
    +
    tcemem->mem = mem;
    list_add(&tcemem->next, &container->prereg_list);

    --
    2.14.1
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