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author | David Herrmann <dh.herrmann@gmail.com> | 2013-08-25 16:28:59 (GMT) |
---|---|---|
committer | Dave Airlie <airlied@redhat.com> | 2013-08-27 01:54:58 (GMT) |
commit | acb4652703f0a452405a3ab9319594eddc41391b (patch) | |
tree | 588ca6991d01ce7e560f39cec65e4fc41b150dd6 /drivers | |
parent | ca481c9b2a3ae3598453535b8f0369f1f875d52f (diff) | |
download | linux-acb4652703f0a452405a3ab9319594eddc41391b.tar.xz |
drm: verify vma access in TTM+GEM drivers
GEM does already a good job in tracking access to gem buffers via handles
and drm_vma access management. However, TTM drivers currently do not
verify this during mmap().
TTM provides the verify_access() callback to test this. So fix all drivers
to actually call into gem+vma to verify access instead of always returning
0.
All drivers assume that user-space can only get access to TTM buffers via
GEM handles. So whenever the verify_access() callback is called from
ttm_bo_mmap(), the buffer must have a valid embedded gem object. This is
true for all TTM+GEM drivers. But that's why this patch doesn't touch pure
TTM drivers (ie, vmwgfx).
v2: Switch to drm_vma_node_verify_access() to correctly return -EACCES if
access was denied.
Cc: Dave Airlie <airlied@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/ast/ast_ttm.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/cirrus/cirrus_ttm.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_ttm.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_bo.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/qxl/qxl_ttm.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_ttm.c | 4 |
6 files changed, 18 insertions, 6 deletions
diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c index cf1c833..20fcf4e 100644 --- a/drivers/gpu/drm/ast/ast_ttm.c +++ b/drivers/gpu/drm/ast/ast_ttm.c @@ -148,7 +148,9 @@ ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp) { - return 0; + struct ast_bo *astbo = ast_bo(bo); + + return drm_vma_node_verify_access(&astbo->gem.vma_node, filp); } static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev, diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c index bf8a506..ae2385c 100644 --- a/drivers/gpu/drm/cirrus/cirrus_ttm.c +++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c @@ -148,7 +148,9 @@ cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp) { - return 0; + struct cirrus_bo *cirrusbo = cirrus_bo(bo); + + return drm_vma_node_verify_access(&cirrusbo->gem.vma_node, filp); } static int cirrus_ttm_io_mem_reserve(struct ttm_bo_device *bdev, diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c index 6cf3fa0..fd4539d 100644 --- a/drivers/gpu/drm/mgag200/mgag200_ttm.c +++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c @@ -148,7 +148,9 @@ mgag200_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) static int mgag200_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp) { - return 0; + struct mgag200_bo *mgabo = mgag200_bo(bo); + + return drm_vma_node_verify_access(&mgabo->gem.vma_node, filp); } static int mgag200_ttm_io_mem_reserve(struct ttm_bo_device *bdev, diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 4e7ee5f..e4444ba 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -1260,7 +1260,9 @@ out: static int nouveau_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp) { - return 0; + struct nouveau_bo *nvbo = nouveau_bo(bo); + + return drm_vma_node_verify_access(&nvbo->gem->vma_node, filp); } static int diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c index 1dfd84c..037786d 100644 --- a/drivers/gpu/drm/qxl/qxl_ttm.c +++ b/drivers/gpu/drm/qxl/qxl_ttm.c @@ -212,7 +212,9 @@ static void qxl_evict_flags(struct ttm_buffer_object *bo, static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) { - return 0; + struct qxl_bo *qbo = to_qxl_bo(bo); + + return drm_vma_node_verify_access(&qbo->gem_base.vma_node, filp); } static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 6c0ce89..71245d6 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -203,7 +203,9 @@ static void radeon_evict_flags(struct ttm_buffer_object *bo, static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp) { - return 0; + struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo); + + return drm_vma_node_verify_access(&rbo->gem_base.vma_node, filp); } static void radeon_move_null(struct ttm_buffer_object *bo, |