From: Anusha Srivatsa <asrivats@redhat.com>
To: Neil Armstrong <neil.armstrong@linaro.org>,
Jessica Zhang <quic_jesszhan@quicinc.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>
Cc: Luca Ceresoli <luca.ceresoli@bootlin.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Anusha Srivatsa <asrivats@redhat.com>
Subject: [PATCH RFC 0/2] drm/panel: Refcounted panel allocation
Date: Wed, 12 Mar 2025 20:54:41 -0400 [thread overview]
Message-ID: <20250312-drm-panel-v1-0-e99cd69f6136@redhat.com> (raw)
Primary motivation is to avoid havig a dangling pointer with panels.
In a scenario where panel device no longer exists, the DRM driver
has no idea of it. It can continue to try and access a panel leading
to use-after-free situations.
This is the initial draft more for feedback only. Once the path
forward is clear, further drivers will be converted to using the API.
Suggested-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>
---
Anusha Srivatsa (2):
drm/panel: Add new helpers for refcounted panel allocatons
drm/panel/panel-simple: Use the new allocation in place of devm_kzalloc()
drivers/gpu/drm/drm_panel.c | 50 +++++++++++++++++++++++++++++++
drivers/gpu/drm/panel/panel-simple.c | 4 +--
include/drm/drm_panel.h | 58 ++++++++++++++++++++++++++++++++++++
3 files changed, 109 insertions(+), 3 deletions(-)
---
base-commit: 3282422bf251db541fe07c548ca304130d37d754
change-id: 20250311-drm-panel-c327992e932e
Best regards,
--
Anusha Srivatsa <asrivats@redhat.com>
next reply other threads:[~2025-03-13 0:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-13 0:54 Anusha Srivatsa [this message]
2025-03-13 0:54 ` [PATCH RFC 1/2] drm/panel: Add new helpers for refcounted panel allocatons Anusha Srivatsa
2025-03-13 10:09 ` Luca Ceresoli
2025-03-13 14:34 ` Maxime Ripard
[not found] ` <CAN9Xe3TeKTZtcMPtae7h33H=B-veGW93z8nMpHK+pEuNdh4=2A@mail.gmail.com>
2025-03-14 12:27 ` Luca Ceresoli
2025-03-13 14:42 ` Maxime Ripard
2025-03-13 0:54 ` [PATCH RFC 2/2] drm/panel/panel-simple: Use the new allocation in place of devm_kzalloc() Anusha Srivatsa
2025-03-17 10:12 ` Neil Armstrong
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