6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Natalie Vock <natalie.vock@xxxxxx>
commit 6cc30748e17ea2a64051ceaf83a8372484e597f1 upstream.
PRT BOs may not have any backing store, so bo->tbo.resource will be
NULL. Check for that before dereferencing.
Fixes: 0cce5f285d9a ("drm/amdkfd: Check correct memory types for is_system variable")
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Natalie Vock <natalie.vock@xxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
(cherry picked from commit 3e3fcd29b505cebed659311337ea03b7698767fc)
Cc: stable@xxxxxxxxxxxxxxx # 6.12.x
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
@@ -525,8 +525,9 @@ static void gmc_v12_0_get_vm_pte(struct
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;
