Hi, Just a note that only patch 2 changed from v1 to v2 of this series. This series contains some improvements that Daniel Vetter proposed following a discussion on a recent series: https://lore.kernel.org/lkml/20210712043508.11584-1-desmondcheongzx@xxxxxxxxx/ While preparing these patches, I also noticed some unprotected uses of drm_master in the vmwgfx driver that can be addressed by new functions from the previous series. This series is thus broken up into three patches: 1. Switch from the outer drm_device.master_mutex to the inner drm_file.master_lookup_lock in drm_is_current_master. 2. Update the kerneldoc for drm leases to clarify usage and lifetime/locking rules. 3. Prevent potential use-after-free bugs by replacing calls to drm_master_get with drm_file_get_master in vmwgfx_surface.c. v1 -> v2: Changes to patch 2: - Clarified description of lease fields in drm_master with suggestions from Daniel Vetter. - Added an overview DOC: section for drm leases in drm-uapi.rst. - Cleaned up function documentation in drm_lease.c to use kernel-doc formatting. Best wishes, Desmond Desmond Cheong Zhi Xi (3): drm: use the lookup lock in drm_is_current_master drm: clarify usage of drm leases drm/vmwgfx: fix potential UAF in vmwgfx_surface.c Documentation/gpu/drm-uapi.rst | 15 ++ drivers/gpu/drm/drm_auth.c | 9 +- drivers/gpu/drm/drm_lease.c | 182 ++++++++++++++---------- drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 4 +- include/drm/drm_auth.h | 67 +++++++-- 5 files changed, 187 insertions(+), 90 deletions(-) -- 2.25.1
