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From d20340405f39f0139c4cd420ce993a09822d9a98 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Wed, 5 Sep 2018 17:04:44 +0200
Subject: [PATCH 0237/2940] drm/amdgpu: set bulk_moveable to false when a per
VM is released
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Otherwise we might run into a use after free during bulk move.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 1a8a299f552e..f12c050aaae3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2466,8 +2466,12 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
struct amdgpu_bo_va *bo_va)
{
struct amdgpu_bo_va_mapping *mapping, *next;
+ struct amdgpu_bo *bo = bo_va->base.bo;
struct amdgpu_vm *vm = bo_va->base.vm;
+ if (bo && bo->tbo.resv == vm->root.base.bo->tbo.resv)
+ vm->bulk_moveable = false;
+
list_del(&bo_va->base.bo_list);
spin_lock(&vm->moved_lock);
--
2.17.1
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