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drm/amdgpu: Fix size validation for non-exclusive domains (v4) 

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@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: AMD Graphics <amd-gfx@lists.freedesktop.org>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Luben Tuikov 2022-12-10 02:51:19 -05:00 committed by Alex Deucher
parent 28afcb0ad5
commit 7554886daa
1 changed files with 8 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
View File

@ -448,27 +448,24 @@ 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)
WARN_ON_ONCE("GTT domain requested but GTT mem manager uninitialized");
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;