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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-05 09:13:24 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-05 09:13:24 +0300 |
| commit | 9c2edd8b5bcb36ec6c890dd85f8fd13034aaa43e (patch) | |
| tree | 052b3c229e00462cd0c5773c8b6b9fe314e86f38 /drivers/gpu/drm/msm/msm_gem.c | |
| parent | aa652b1ccbd0d3a9cd4ecdec6d36935f78c838da (diff) | |
| parent | c6935931c1894ff857616ff8549b61236a19148f (diff) | |
| download | linux-9c2edd8b5bcb36ec6c890dd85f8fd13034aaa43e.tar.xz | |
Merge 4.8-rc5 into staging-next
We want the staging fixes in here as well to handle merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 6cd4af443139..85f3047e05ae 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -196,11 +196,20 @@ int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_gem_object *obj = vma->vm_private_data; struct drm_device *dev = obj->dev; + struct msm_drm_private *priv = dev->dev_private; struct page **pages; unsigned long pfn; pgoff_t pgoff; int ret; + /* This should only happen if userspace tries to pass a mmap'd + * but unfaulted gem bo vaddr into submit ioctl, triggering + * a page fault while struct_mutex is already held. This is + * not a valid use-case so just bail. + */ + if (priv->struct_mutex_task == current) + return VM_FAULT_SIGBUS; + /* Make sure we don't parallel update on a fault, nor move or remove * something from beneath our feet */ |