From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Tue, 29 Aug 2017 16:07:31 +0200
Subject: drm/amdgpu: restrict userptr even more
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Git-commit: 4f5839c56ec38e2f8fcc59ca0e01defa8702987b
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Don't allow them to be GEM imported into another process.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -112,7 +112,13 @@ int amdgpu_gem_object_open(struct drm_ge
struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
struct amdgpu_vm *vm = &fpriv->vm;
struct amdgpu_bo_va *bo_va;
+ struct mm_struct *mm;
int r;
+
+ mm = amdgpu_ttm_tt_get_usermm(abo->tbo.ttm);
+ if (mm && mm != current->mm)
+ return -EPERM;
+
r = amdgpu_bo_reserve(abo, false);
if (r)
return r;