drm/nouveau: NULL pointer deref in drm_handle_vblank() on rebind

I can easily trigger a crash in nouveau interrupt handler by unbinding and rebinding the GPU. The command used: echo $pci_device > nouveau/unbind && \ sleep 5 && \ echo $pci_device > nouveau/bind Kernel is 3.4.0 with modular drm/nouveau. GPU is NVidia nForce IGP (NV11) Unbind

drm/nouveau: NULL pointer deref in drm_handle_vblank() on rebind

I can easily trigger a crash in nouveau interrupt handler by unbinding and rebinding the GPU. The command used: echo $pci_device > nouveau/unbind && \ sleep 5 && \ echo $pci_device > nouveau/bind Kernel is 3.4.0 with modular drm/nouveau. GPU is NVidia nForce IGP (NV11) Unbind