diff options
| -rw-r--r-- | drivers/iommu/iommufd/selftest.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 04293b20e20c..c5c14bbf723c 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -1343,7 +1343,7 @@ static int iommufd_test_dirty(struct iommufd_ucmd *ucmd, unsigned int mockpt_id, unsigned long page_size, void __user *uptr, u32 flags) { - unsigned long bitmap_size, i, max; + unsigned long i, max; struct iommu_test_cmd *cmd = ucmd->cmd; struct iommufd_hw_pagetable *hwpt; struct mock_iommu_domain *mock; @@ -1364,15 +1364,14 @@ static int iommufd_test_dirty(struct iommufd_ucmd *ucmd, unsigned int mockpt_id, } max = length / page_size; - bitmap_size = DIV_ROUND_UP(max, BITS_PER_BYTE); - - tmp = kvzalloc(bitmap_size, GFP_KERNEL_ACCOUNT); + tmp = kvzalloc(DIV_ROUND_UP(max, BITS_PER_LONG) * sizeof(unsigned long), + GFP_KERNEL_ACCOUNT); if (!tmp) { rc = -ENOMEM; goto out_put; } - if (copy_from_user(tmp, uptr, bitmap_size)) { + if (copy_from_user(tmp, uptr,DIV_ROUND_UP(max, BITS_PER_BYTE))) { rc = -EFAULT; goto out_free; } |