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* [Intel-gfx] [PATCH 0/3] drm, drm/vmwgfx: fixes and updates related to drm_master
@ 2021-07-22  9:29 Desmond Cheong Zhi Xi
  2021-07-22  9:29 ` [Intel-gfx] [PATCH 1/3] drm: use the lookup lock in drm_is_current_master Desmond Cheong Zhi Xi
                   ` (5 more replies)
  0 siblings, 6 replies; 21+ messages in thread
From: Desmond Cheong Zhi Xi @ 2021-07-22  9:29 UTC (permalink / raw)
  To: linux-graphics-maintainer, zackr, airlied, daniel,
	maarten.lankhorst, mripard, tzimmermann
  Cc: gregkh, intel-gfx, linux-kernel, dri-devel, skhan,
	Desmond Cheong Zhi Xi, linux-kernel-mentees

Hi,

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@gmail.com/

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 lease fields in drm_master to clarify 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.

Best wishes,
Desmond

Desmond Cheong Zhi Xi (3):
  drm: use the lookup lock in drm_is_current_master
  drm: clarify lifetime/locking for drm_master's lease fields
  drm/vmwgfx: fix potential UAF in vmwgfx_surface.c

 drivers/gpu/drm/drm_auth.c              |  9 ++--
 drivers/gpu/drm/vmwgfx/vmwgfx_surface.c |  4 +-
 include/drm/drm_auth.h                  | 62 ++++++++++++++++++++-----
 3 files changed, 58 insertions(+), 17 deletions(-)

-- 
2.25.1

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^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2021-07-29 14:58 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-22  9:29 [Intel-gfx] [PATCH 0/3] drm, drm/vmwgfx: fixes and updates related to drm_master Desmond Cheong Zhi Xi
2021-07-22  9:29 ` [Intel-gfx] [PATCH 1/3] drm: use the lookup lock in drm_is_current_master Desmond Cheong Zhi Xi
2021-07-22 10:38   ` Daniel Vetter
2021-07-22 15:04     ` Boqun Feng
2021-07-22 19:02       ` Daniel Vetter
2021-07-23  7:16         ` Boqun Feng
2021-07-27 14:37     ` Peter Zijlstra
2021-07-29  7:00       ` Daniel Vetter
2021-07-29 14:32         ` Desmond Cheong Zhi Xi
2021-07-29 14:45           ` Peter Zijlstra
2021-07-22  9:29 ` [Intel-gfx] [PATCH 2/3] drm: clarify lifetime/locking for drm_master's lease fields Desmond Cheong Zhi Xi
2021-07-22 10:35   ` Daniel Vetter
2021-07-22 13:02     ` Desmond Cheong Zhi Xi
2021-07-22 14:17       ` Daniel Vetter
2021-07-22  9:29 ` [Intel-gfx] [PATCH 3/3] drm/vmwgfx: fix potential UAF in vmwgfx_surface.c Desmond Cheong Zhi Xi
2021-07-22 10:39   ` Daniel Vetter
2021-07-22 19:17   ` Zack Rusin
2021-07-23  6:44     ` Desmond Cheong Zhi Xi
2021-07-22 14:05 ` [Intel-gfx] ✗ Fi.CI.SPARSE: warning for drm, drm/vmwgfx: fixes and updates related to drm_master Patchwork
2021-07-22 14:34 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2021-07-27 17:42 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for drm, drm/vmwgfx: fixes and updates related to drm_master (rev2) Patchwork

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