linux-kernel - Re: (subset) [PATCH 0/8] gpiolib: sanitize return values of callbacks

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Message-ID: <173978946845.153202.10192575435977387116.b4-ty@linaro.org>
Date: Mon, 17 Feb 2025 11:51:37 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: (subset) [PATCH 0/8] gpiolib: sanitize return values of callbacks

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>


On Mon, 10 Feb 2025 11:51:54 +0100, Bartosz Golaszewski wrote:
> We've had instances of drivers returning invalid values from gpio_chip
> calbacks. In several cases these return values would be propagated to
> user-space and confuse programs that only expect 0 or negative errnos
> from ioctl()s. Let's sanitize the return values of callbacks and make
> sure we don't allow anyone see invalid ones.
> 
> The first patch checks the return values of get_direction() in kernel
> where needed and is a backportable fix.
> 
> [...]

Queued this one for fixes. The rest will be picked up next week once this
is upstream.

[1/8] gpiolib: check the return value of gpio_chip::get_direction()
      commit: 9d846b1aebbe488f245f1aa463802ff9c34cc078

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>