From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A10AC391512 for ; Wed, 20 May 2026 07:50:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779263404; cv=none; b=Un3ikoNGDEpRHDTAnQnbaCTVWPG2WPgskudZ+cv4QiPBU9Vpo4j3iRLGUQVSF5DoOraXdLkZaPdwSx4uIwjTC6Ae1Faps1fF5p/+5VwpuPpbrcBAl75lbZxfjdaL3vFFDi7fbt5YAGpJdIDuoTEptRYgTXlR6nzmPbx4uqatlWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779263404; c=relaxed/simple; bh=v8QO5wIg8fMTR7uQ8ckLfU5/0hxPkOwG5s8qbIzOad8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X1i9MGmxaBhjq8F9lLvnyp+L0pEXAdbB4g/KNIPDZMRqrqFP8oX3/BxYITNYWteglMafWJF/y27L2c9Q5w9Rz0B/u14/+AMa4Efy/gCTdC21zeyiGq+6yRl87C2sH/ibeb8miCguAo5XIoYM9I2kV8mLgl9WLS7GPPB+9eAy6lU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=MM/YiFnH; arc=none smtp.client-ip=209.85.128.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MM/YiFnH" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-48909558b3aso47869855e9.0 for ; Wed, 20 May 2026 00:50:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779263401; x=1779868201; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Thg0qkEsY0JjFZeY1AfIvrImoT1KU/tjOzYFDJJSqYU=; b=MM/YiFnHIBWAfXqauOYaU6lKNLzl7ah3KqyUBCiksDawFWQoIpv5anAvXv6w/RIZzk MGqxLq4ITMXP4dVbc3bO9Pim/NLPkFoFXP5Ei7C4L5wJWYfvJeAlyNeyk8gA845yIq6u OehCc0WzW0okoCl25J1LDgIr956hEipd7GhUlR3ektEcJUsrCfgoIPAqbanfEkVSdMfv P94GJNwaDuGDW3eg6LqYAnXHpUu+guAmxvf7rha40QeG6zdy9s7V04oOCsxbgdG7hX6j xxGB5w8kcle50Qk6g//NO6tb97KokLfH+6Vn7+CQfG3+hXdSOkqEyb6Lg8jelQMWYohM jUJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779263401; x=1779868201; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Thg0qkEsY0JjFZeY1AfIvrImoT1KU/tjOzYFDJJSqYU=; b=qOvPNjFdP4cmDjyiIvKrban1wUDNP1It6k9ZzGrTTXqT+srZS6PJ67ym+jw3+OwVWz px9oV+MpH8lL7Gunj43zX0yuVDCtNNY+HRhwSrroX9qpZfnTFqerbn/QWMues3oAr6YR CzIj4z4eyc3XTuZhNEzeWdxNxVICIHZzw+47q1y91jFqrbWnjic2QqbYUSFKBO5t4sx6 lRYmnyTTEKzl5gNs1NYLqEvci9MK7GJ6uAeo2HWt662XxRTmeZ6cIP4QwhdO2fnBajVh JbVgFdCIMwFB1ElEpkavy/F/NnVYXSS5yMkCpzx9NrqeB5rpVIHPZEbDkiLXYosBojHr YflQ== X-Forwarded-Encrypted: i=1; AFNElJ+NMxYoLqLc0PTYxTnY2pa/731MZuSjSvvIhGRJirJLrfcRcUsLeSfensQW500FsCvx3UzUcjKCYoN/@vger.kernel.org X-Gm-Message-State: AOJu0YxKTAIsOlt9G9YTL751RWJPQoysdhCtSwLsbu7Cchzko87VkpxX IxG/WBAY/EnGwZ+7yUdCxpYlSgirWQjaJdiuu18UKUZrlSz/qzTpJfFH X-Gm-Gg: Acq92OFyQWXs2RVVHtSaDg2T6e4GZ/n1mVETErMOYrzZxMICBi4+EvQtrx8SXbBkn6j go0MBunawmjzaHk3zsaWixli7e9wY/vSL9CXeH8QdmweQa6auWRbjD3TYaGxVTJYrlC+uW+fcIY FPuVrubo3O79jkKzO63eIbnhDAWlBF5XQXraK0nSPKRHE8woyVu80JzQn8leeD87OOHYygeWoKJ 2j7nnQSeGSy/VH7vbf58GanHiFbxDPCK8as2YFxUbmq4rOzgXhK+CCkSxUweDJMTJU3WhO8tKPv vQPqVD/0bbLrpb2XPAp5tgzN90QsEiNItPjIMYyQLNrVJlfNoUT913nK23NuTRXDt6VqT4Bx6AP cwzuJslT7diirc0BaRE/vvF4aA0xcf21RLsNqtDrBhMaIiE1PsYIBI5ffiuDOS01Xn/ccmd9XZb 6I06vr0CGolpS3xKDzOMy5iBTRGpQCLw== X-Received: by 2002:a05:600c:2ad3:b0:490:f32:3a07 with SMTP id 5b1f17b1804b1-4900f323a11mr124130385e9.30.1779263400772; Wed, 20 May 2026 00:50:00 -0700 (PDT) Received: from G614PR ([2a01:e11:202b:40:328e:213e:a3da:580f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48fffb9aac4sm496536215e9.9.2026.05.20.00.49.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2026 00:50:00 -0700 (PDT) From: "Marco Scardovi (scardracs)" To: andriy.shevchenko@linux.intel.com Cc: brgl@kernel.org, linusw@kernel.org, linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, mika.westerberg@linux.intel.com, mscardovi95@gmail.com, westeri@kernel.org Subject: [PATCH v3 1/2] gpiolib: acpi: Add robust bounds-checking for GPIO pin resources Date: Wed, 20 May 2026 09:45:46 +0200 Message-ID: <20260520074955.55443-2-mscardovi95@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520074955.55443-1-mscardovi95@gmail.com> References: <20260520074955.55443-1-mscardovi95@gmail.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Ensure that the GPIO pin resource arrays are safely bounded before accessing indices. Add bounds checking in acpi_request_own_gpiod(), acpi_gpio_irq_is_wake(), and acpi_gpiochip_alloc_event() to prevent out-of-bounds array reads if the ACPI namespace provides malformed or empty pin tables. Assisted-by: Antigravity:gemini-3-flash Signed-off-by: Marco Scardovi --- drivers/gpio/gpiolib-acpi-core.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/gpio/gpiolib-acpi-core.c b/drivers/gpio/gpiolib-acpi-core.c index eb8a40cfb7a9..a6d78dad299e 100644 --- a/drivers/gpio/gpiolib-acpi-core.c +++ b/drivers/gpio/gpiolib-acpi-core.c @@ -320,10 +320,18 @@ static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip, unsigned int index, const char *label) { - int polarity = GPIO_ACTIVE_HIGH; - enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio, polarity); - unsigned int pin = agpio->pin_table[index]; struct gpio_desc *desc; + enum gpiod_flags flags; + unsigned int pin; + int polarity; + + polarity = GPIO_ACTIVE_HIGH; + flags = acpi_gpio_to_gpiod_flags(agpio, polarity); + + if (index >= agpio->pin_table_length) + return ERR_PTR(-EINVAL); + + pin = agpio->pin_table[index]; desc = gpiochip_request_own_desc(chip, pin, label, polarity, flags); if (IS_ERR(desc)) @@ -337,11 +345,16 @@ static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip, static bool acpi_gpio_irq_is_wake(struct device *parent, const struct acpi_resource_gpio *agpio) { - unsigned int pin = agpio->pin_table[0]; + unsigned int pin; if (agpio->wake_capable != ACPI_WAKE_CAPABLE) return false; + if (agpio->pin_table_length == 0) + return false; + + pin = agpio->pin_table[0]; + if (acpi_gpio_in_ignore_list(ACPI_GPIO_IGNORE_WAKE, dev_name(parent), pin)) { dev_info(parent, "Ignoring wakeup on pin %u\n", pin); return false; @@ -368,6 +381,9 @@ static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, return AE_OK; handle = ACPI_HANDLE(chip->parent); + if (agpio->pin_table_length == 0) + return AE_OK; + pin = agpio->pin_table[0]; if (pin <= 255) { -- 2.54.0