Fix amdgpu_bo_validate_size() to check whether the TTM domain manager for the
requested memory exists, else we get a kernel oops when dereferencing "man".
v2: Make the patch standalone, i.e. not dependent on local patches.
v3: Preserve old behaviour and just check that the manager pointer is not
NULL.
v4: Complain if GTT domain requested and it is uninitialized--most likely a
bug.
Cc: Alex Deucher <Alexander.Deucher@xxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: AMD Graphics <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Luben Tuikov <luben.tuikov@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index fd3ab4b5e5bb1f..983a12cac329a7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -448,27 +448,25 @@ static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
/*
* If GTT is part of requested domains the check must succeed to
- * allow fall back to GTT
+ * allow fall back to GTT.
*/
if (domain & AMDGPU_GEM_DOMAIN_GTT) {
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
- if (size < man->size)
+ if (man && size < man->size)
return true;
- else
- goto fail;
- }
-
- if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
+ else if (!man)
+ pr_err_ratelimited("GTT domain requested but GTT mem manager uninitialized, for size: %lu\n",
+ size);
+ goto fail;
+ } else if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
- if (size < man->size)
+ if (man && size < man->size)
return true;
- else
- goto fail;
+ goto fail;
}
-
/* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU */
return true;
base-commit: 84abaa3a855571ebd4e57a7249b867a2fa3763da
--
2.39.0
