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From 113e58add269ef19e9994544a85bc4b34e809410 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Tue, 29 Aug 2017 16:07:31 +0200
Subject: [PATCH 0867/4131] drm/amdgpu: restrict userptr even more
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 00bc506..768de03 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -155,7 +155,13 @@ int amdgpu_gem_object_open(struct drm_gem_object *obj,
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;
--
2.7.4
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