Am 10.03.25 um 18:08 schrieb Natalie Vock:
> PRT BOs may not have any backing store, so bo->tbo.resource will be
> NULL. Check for that before dereferencing.
>
> Fixes: 0cce5f285d9ae8 ("drm/amdkfd: Check correct memory types for is_system variable")
> Signed-off-by: Natalie Vock <natalie.vock@xxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
> index ea7c32d8380ba..bf8d01da88154 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
> @@ -528,8 +528,9 @@ static void gmc_v12_0_get_vm_pte(struct amdgpu_device *adev,
>
> bo_adev = amdgpu_ttm_adev(bo->tbo.bdev);
> coherent = bo->flags & AMDGPU_GEM_CREATE_COHERENT;
> - is_system = (bo->tbo.resource->mem_type == TTM_PL_TT) ||
> - (bo->tbo.resource->mem_type == AMDGPU_PL_PREEMPT);
> + is_system = bo->tbo.resource &&
> + (bo->tbo.resource->mem_type == TTM_PL_TT ||
> + bo->tbo.resource->mem_type == AMDGPU_PL_PREEMPT);
>
> if (bo && bo->flags & AMDGPU_GEM_CREATE_GFX12_DCC)
> *flags |= AMDGPU_PTE_DCC;
> --
> 2.48.1
>
