linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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, corbet@lwn.net
Cc: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	skhan@linuxfoundation.org, gregkh@linuxfoundation.org,
	linux-kernel-mentees@lists.linuxfoundation.org
Subject: [PATCH v2 0/3] drm, drm/vmwgfx: fixes and updates related to drm_master
Date: Sat, 24 Jul 2021 19:18:21 +0800	[thread overview]
Message-ID: <20210724111824.59266-1-desmondcheongzx@gmail.com> (raw)

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@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 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


             reply	other threads:[~2021-07-24 11:19 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-24 11:18 Desmond Cheong Zhi Xi [this message]
2021-07-24 11:18 ` [PATCH v2 1/3] drm: use the lookup lock in drm_is_current_master Desmond Cheong Zhi Xi
2021-07-27 13:04   ` Daniel Vetter
2021-07-24 11:18 ` [PATCH v2 2/3] drm: clarify usage of drm leases Desmond Cheong Zhi Xi
2021-07-27 13:04   ` Daniel Vetter
2021-07-28 10:01     ` Desmond Cheong Zhi Xi
2021-07-24 11:18 ` [PATCH v2 3/3] drm/vmwgfx: fix potential UAF in vmwgfx_surface.c Desmond Cheong Zhi Xi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210724111824.59266-1-desmondcheongzx@gmail.com \
    --to=desmondcheongzx@gmail.com \
    --cc=airlied@linux.ie \
    --cc=corbet@lwn.net \
    --cc=daniel@ffwll.ch \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-graphics-maintainer@vmware.com \
    --cc=linux-kernel-mentees@lists.linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=maarten.lankhorst@linux.intel.com \
    --cc=mripard@kernel.org \
    --cc=skhan@linuxfoundation.org \
    --cc=tzimmermann@suse.de \
    --cc=zackr@vmware.com \
    --subject='Re: [PATCH v2 0/3] drm, drm/vmwgfx: fixes and updates related to drm_master' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).