drm/amdgpu: check alignment on CPU page for bo map

The page table of AMDGPU requires an alignment to CPU page so we should
check ioctl parameters for it.  Return -EINVAL if some parameter is
unaligned to CPU page, instead of corrupt the page table sliently.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Xi Ruoyao <xry111@mengyan1223.wang>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 10de2cf..7d2c8b1 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2197,8 +2197,8 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
        uint64_t eaddr;
 
        /* validate the parameters */
-       if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK ||
-           size == 0 || size & AMDGPU_GPU_PAGE_MASK)
+       if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
+           size == 0 || size & ~PAGE_MASK)
                return -EINVAL;
 
        /* make sure object fit at this offset */
@@ -2263,8 +2263,8 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
        int r;
 
        /* validate the parameters */
-       if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK ||
-           size == 0 || size & AMDGPU_GPU_PAGE_MASK)
+       if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
+           size == 0 || size & ~PAGE_MASK)
                return -EINVAL;
 
        /* make sure object fit at this offset */