diff options
| author | Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> | 2019-01-30 02:53:21 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-02-15 11:15:37 -0500 |
| commit | 021830d24ba55a578f602979274965344c8e6284 (patch) | |
| tree | 5fe70a4455cea94a2b5b2385bb04cfc523a864d9 /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | 2a84e48e9712ea8591a10dd59d59ccab3d54efd6 (diff) | |
drm/amdgpu: Check if fd really is an amdgpu fd.
Otherwise we interpret the file private data as drm & amdgpu data
while it might not be, possibly allowing one to get memory corruption.
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 7f3aa7b7e1d8..637f927e3675 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1178,6 +1178,22 @@ static const struct file_operations amdgpu_driver_kms_fops = { #endif }; +int amdgpu_file_to_fpriv(struct file *filp, struct amdgpu_fpriv **fpriv) +{ + struct drm_file *file; + + if (!filp) + return -EINVAL; + + if (filp->f_op != &amdgpu_driver_kms_fops) { + return -EINVAL; + } + + file = filp->private_data; + *fpriv = file->driver_priv; + return 0; +} + static bool amdgpu_get_crtc_scanout_position(struct drm_device *dev, unsigned int pipe, bool in_vblank_irq, int *vpos, int *hpos, |