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Thu, 24 Jul 2025 02:25:03 -0700 (PDT) Received: from [127.0.1.1] ([2a01:cb1d:dc:7e00:f44c:20db:7ada:b556]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b76fc72548sm1600833f8f.30.2025.07.24.02.25.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Jul 2025 02:25:02 -0700 (PDT) From: Bartosz Golaszewski Date: Thu, 24 Jul 2025 11:24:43 +0200 Subject: [PATCH v3 15/15] pinctrl: qcom: make the pinmuxing strict MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250724-pinctrl-gpio-pinfuncs-v3-15-af4db9302de4@linaro.org> References: <20250724-pinctrl-gpio-pinfuncs-v3-0-af4db9302de4@linaro.org> In-Reply-To: <20250724-pinctrl-gpio-pinfuncs-v3-0-af4db9302de4@linaro.org> To: Linus Walleij , Bjorn Andersson , Konrad Dybcio , Alexey Klimov , Lorenzo Bianconi , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno , Paul Cercueil , Kees Cook , Andy Shevchenko , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Dong Aisheng , Fabio Estevam , Shawn Guo , Jacky Bai , Pengutronix Kernel Team , NXP S32 Linux Team , Sascha Hauer , Tony Lindgren , Haojian Zhuang , Geert Uytterhoeven Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, imx@lists.linux.dev, linux-omap@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Bartosz Golaszewski , Konrad Dybcio X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1142; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=M36QPREHYk2Y1Ol3wL/sT7z2U9JVD+MimNp7WJSOHU0=; b=owEBbQKS/ZANAwAKARGnLqAUcddyAcsmYgBogfvUuNqnvhBaTQ7E02dLbZ93XPdMix/+wojXR G62efWlN2eJAjMEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCaIH71AAKCRARpy6gFHHX csIEEACcYzcalCunEHwwLc8fC351P1QZ0/EviGqXfAPEAKDWr3P+rwFdN2Ta12zzVjBkLzjyQ91 Zv3Pyd8ByzwdIUsKqqnTCqQXU561HpvlpivEPwqQfk2Fv1/z8zXTLdhqLYeWc2DtYwXVL47+ep1 hvPNS0sKjxZZSbhD2Cv0so7lDbU9TIvO8FfROCo+OUmJ+fNRIHwJdm3DZ3UCBbKrfqj0JKqwStC SmdBFpZg+RC6pqBdqVp2puRBkrX4kkPXma3WhGUgbQa/jdRrzeKTzhOecZSN78aF+JYuAOuEWas 9ZYmbC12bDFImUccK4LcZfdm6UKPE66KoyCTfbJSdLsUaafuNUop1v3HMU+T1Qr/Xjdxcfc1d72 xDxNII3sKlNkkl6WGjDNi7bqM437VkY4D3MqKo2PdUpL8pWVacs90dpKk/TeHcMZqMlSPpWf6Ir w0BoC8kdAtDjE9Xmx8h4NgBJrMuqyRB+w2H/MkSVj85rAH3A8nrxlRd/vqL77bGkehXfVeY7coP hWnYxxxDdbXZTNWgEpW4pWcbFrtw2pyKmva81FwQzEbINBVc2nQJQb2Qpd68J7/3170a6GFWyeN MElcFiUfHMZhzI5U6MPEUSceL4b9e10SrngoFXdrORgydvHqnRID4/lq5Qv8dryavy2pK7C0AN1 RovE1kMQsSfBwRA== X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Rspamd-Queue-Id: 942E010000A X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: j91hzdsjx9wjpz1onc3nofurboqgxwus X-HE-Tag: 1753349104-749101 X-HE-Meta: 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 XmvMQan0 A6TQiirnmGqBxtzLgFfbT3oO3zb57DXEUznr+ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Bartosz Golaszewski The strict flag in struct pinmux_ops disallows the usage of the same pin as a GPIO and for another function. Without it, a rouge user-space process with enough privileges (or even a buggy driver) can request a used pin as GPIO and drive it, potentially confusing devices or even crashing the system. Set it globally for all pinctrl-msm users. Reviewed-by: Konrad Dybcio Signed-off-by: Bartosz Golaszewski --- drivers/pinctrl/qcom/pinctrl-msm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index 7010be8d1ace062fcf7743e539d2065d4aed856b..ad572c923e2ab8caed134207ec02c4107d4dc2bd 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -268,6 +268,7 @@ static const struct pinmux_ops msm_pinmux_ops = { .function_is_gpio = pinmux_generic_function_is_gpio, .gpio_request_enable = msm_pinmux_request_gpio, .set_mux = msm_pinmux_set_mux, + .strict = true, }; static int msm_config_reg(struct msm_pinctrl *pctrl, -- 2.48.1