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From: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
To: linux-graphics-maintainer@vmware.com, zackr@vmware.com,
	airlied@linux.ie, daniel@ffwll.ch,
	maarten.lankhorst@linux.intel.com, mripard@kernel.org,
	tzimmermann@suse.de
Cc: gregkh@linuxfoundation.org, intel-gfx@lists.freedesktop.org,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	skhan@linuxfoundation.org,
	Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>,
	linux-kernel-mentees@lists.linuxfoundation.org
Subject: [Intel-gfx] [PATCH 0/3] drm, drm/vmwgfx: fixes and updates related to drm_master
Date: Thu, 22 Jul 2021 17:29:26 +0800	[thread overview]
Message-ID: <20210722092929.244629-1-desmondcheongzx@gmail.com> (raw)

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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             reply	other threads:[~2021-07-22 13:22 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-22  9:29 Desmond Cheong Zhi Xi [this message]
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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