linux-kernel - Re: (subset) [PATCH 00/23] gpiolib: Adopt revocable mechanism for UAF prevention

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Message-ID: <176883238369.34730.6318990234727983164.b4-ty@oss.qualcomm.com>
Date: Mon, 19 Jan 2026 15:21:30 +0100
From: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
To: Benson Leung <bleung@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Danilo Krummrich <dakr@...nel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>, Linus Walleij <linusw@...nel.org>,
        Tzung-Bi Shih <tzungbi@...nel.org>
Cc: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>,
        Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        chrome-platform@...ts.linux.dev, linux-kselftest@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Simona Vetter <simona.vetter@...ll.ch>,
        Dan Williams <dan.j.williams@...el.com>, linux-gpio@...r.kernel.org,
        Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: (subset) [PATCH 00/23] gpiolib: Adopt revocable mechanism for UAF prevention


On Fri, 16 Jan 2026 08:10:13 +0000, Tzung-Bi Shih wrote:
> This series transitions the UAF prevention logic within the GPIO core
> (gpiolib) to use the 'revocable' mechanism.
> 
> The existing code aims to prevent UAF issues when the underlying GPIO
> chip is removed.  This series replaces that custom logic with the
> generic 'revocable' API, which is designed to handle such lifecycle
> dependencies.  There should be no change in behavior.
> 
> [...]

Tzung-Bi: I queued these two for fixes. Please resend patch 04/23 separately
so that I can queue it for v6.19 as well. 01/23 and 03/23 risk impacting a
very fragile path in GPIOLIB so any changes to it will have to wait until
v7.0-rc1 to give it a lot of time in next.

[02/23] gpiolib: cdev: Fix resource leaks on errors in gpiolib_cdev_register()
        commit: be037ec1785d76351037103ce6baddd3299606ee
[05/23] gpiolib: cdev: Correct return code on memory allocation failure
        commit: c7843298bf973d4bc7f4346140661e117186decc

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>