linux-kernel - Re: [PATCH] gpiolib: fix a NULL-pointer dereference when setting direction

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Message-ID: <172979664791.66034.4461804157130165429.b4-ty@linaro.org>
Date: Thu, 24 Oct 2024 21:04:14 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>,
	Kent Gibson <warthog618@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Klara Modin <klarasmodin@...il.com>,
	Bartosz Golaszewski <brgl@...ev.pl>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpiolib: fix a NULL-pointer dereference when setting direction

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


On Thu, 24 Oct 2024 15:38:34 +0200, Bartosz Golaszewski wrote:
> For optional GPIOs we may pass NULL to gpiod_direction_(input|output)().
> With the call to the notifier chain added by commit 07c61d4da43f
> ("gpiolib: notify user-space about in-kernel line state changes") we
> will now dereference a NULL pointer in this case. The reason for that is
> the fact that the expansion of the VALIDATE_DESC() macro (which returns
> 0 for NULL descriptors) was moved into the nonotify variants of the
> direction setters.
> 
> [...]

Applied, thanks!

[1/1] gpiolib: fix a NULL-pointer dereference when setting direction
      commit: 1f4a640e9ac7f450752365541ad9c064b13ef8bf

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