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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
This commit is contained in:
Xℹ Ruoyao 2021-03-30 23:33:34 +08:00 committed by Alex Deucher
parent 566c6e25f9
commit e3512fb670
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -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 */