Re: [PATCH v3 0/4] drm/panel: refcounting panel lookups and references
Neil Armstrong <[email protected]>
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| Message-ID | <178455228150.789946.15332957012612566281.b4-ty@b4> |
Hi,
On Fri, 17 Jul 2026 16:02:03 +0200, Albert Esteve wrote:
> The drm_panel subsystem provides kref-based reference counting [1]
> (drm_panel_get/put) but almost nothing in the tree actually uses it.
> This results in a systemic use-after-free pattern throughout the codebase.
>
> This series aims to close all those issues.
>
> Patches 1-2: fix the infrastructure. drm_panel_add/remove now keep
> a counted reference for the list entry. drm_panel_bridge_add_typed()
> now holds a counted reference for the lifetime of the panel_bridge.
>
> [...]
Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-next)
[1/4] drm/panel: have drm_panel_add/remove manage a list reference
https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/b619d9d2af33db01ea237e3546e9d55595e94ea0
[2/4] drm/bridge/panel: hold a reference to the wrapped panel
https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/34069e04d338a333561b64a2da055bd16bfba39b
[3/4] drm/panel: of_drm_find_panel() return a counted reference
https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/738ff709f7cf82a41cbd9f6b8f9b1f236ce26610
[4/4] drm/panel: find_panel_by_fwnode() return a counted reference
https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/d857b8ce04a7ed4b36a11db16968ab1652ed702a
--
Neil