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3e977ac617
If the user has created a read-only object, they should not be allowed to circumvent the write protection by using a GGTT mmapping. Deny it. Also most machines do not support read-only GGTT PTEs, so again we have to reject attempted writes. Fortunately, this is known a priori, so we can at least reject in the call to create the mmap (with a sanity check in the fault handler). v2: Check the vma->vm_flags during mmap() to allow readonly access. v3: Remove VM_MAYWRITE to curtail mprotect() Testcase: igt/gem_userptr_blits/readonly_mmap* Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Jon Bloomfield <jon.bloomfield@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Auld <matthew.william.auld@gmail.com> Cc: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com> #v1 Reviewed-by: Jon Bloomfield <jon.bloomfield@intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180712185315.3288-4-chris@chris-wilson.co.uk |
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.. | ||
bridge | ||
i2c | ||
tinydrm | ||
ttm | ||
amd_asic_type.h | ||
ati_pcigart.h | ||
drm_agpsupport.h | ||
drm_atomic.h | ||
drm_atomic_helper.h | ||
drm_auth.h | ||
drm_blend.h | ||
drm_bridge.h | ||
drm_cache.h | ||
drm_color_mgmt.h | ||
drm_connector.h | ||
drm_crtc.h | ||
drm_crtc_helper.h | ||
drm_debugfs.h | ||
drm_debugfs_crc.h | ||
drm_device.h | ||
drm_displayid.h | ||
drm_dp_dual_mode_helper.h | ||
drm_dp_helper.h | ||
drm_dp_mst_helper.h | ||
drm_drv.h | ||
drm_edid.h | ||
drm_encoder.h | ||
drm_encoder_slave.h | ||
drm_fb_cma_helper.h | ||
drm_fb_helper.h | ||
drm_file.h | ||
drm_fixed.h | ||
drm_flip_work.h | ||
drm_fourcc.h | ||
drm_framebuffer.h | ||
drm_gem.h | ||
drm_gem_cma_helper.h | ||
drm_gem_framebuffer_helper.h | ||
drm_global.h | ||
drm_hashtab.h | ||
drm_hdcp.h | ||
drm_ioctl.h | ||
drm_irq.h | ||
drm_lease.h | ||
drm_legacy.h | ||
drm_mipi_dsi.h | ||
drm_mm.h | ||
drm_mode_config.h | ||
drm_mode_object.h | ||
drm_modes.h | ||
drm_modeset_helper.h | ||
drm_modeset_helper_vtables.h | ||
drm_modeset_lock.h | ||
drm_of.h | ||
drm_os_linux.h | ||
drm_panel.h | ||
drm_pci.h | ||
drm_pciids.h | ||
drm_plane.h | ||
drm_plane_helper.h | ||
drm_prime.h | ||
drm_print.h | ||
drm_property.h | ||
drm_rect.h | ||
drm_scdc_helper.h | ||
drm_simple_kms_helper.h | ||
drm_syncobj.h | ||
drm_sysfs.h | ||
drm_utils.h | ||
drm_vblank.h | ||
drm_vma_manager.h | ||
drmP.h | ||
gma_drm.h | ||
gpu_scheduler.h | ||
gpu_scheduler_trace.h | ||
i915_component.h | ||
i915_drm.h | ||
i915_pciids.h | ||
intel-gtt.h | ||
intel_lpe_audio.h | ||
spsc_queue.h |