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([2001:41d0:303:db6b::]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e3ecdfb8esm33716448f8f.54.2026.10.29.04.08.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2026 04:08:34 -0700 (PDT) From: Tristan Madani To: Jonathan Cameron Cc: Kevin Tsai , Lars-Peter Clausen , David Lechner , Nuno Sa , Andy Shevchenko , Hans de Goede , Jean-Baptiste Maneyrol , Srinivas Pandruvada , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tristan Madani Subject: [PATCH v3 2/2] iio: imu: inv_mpu6050: validate ACPI object types in asus_acpi_get_sensor_info() Date: Thu, 29 Oct 2026 11:08:29 +0000 Message-ID: <20261029110829.1086835-3-tristmd@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261026142040.62383-1-tristmd@gmail.com> References: <20261029110829.1086835-1-tristmd@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tristan Madani asus_acpi_get_sensor_info() iterates through a nested ACPI package structure without checking types at either level. The outer object returned by acpi_evaluate_object() and each inner element must be validated as ACPI_TYPE_PACKAGE before accessing their package.count and package.elements members. Use acpi_evaluate_object_typed() to validate the outer object type at evaluation time. Add a type check for each inner element before accessing its package contents. Also replace kfree() with ACPI_FREE() for the ACPI-allocated buffer. Fixes: a35c5d1aa96a ("iio: imu: inv_mpu6050: Create mux clients for ACPI") Cc: stable@vger.kernel.org Signed-off-by: Tristan Madani --- drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c index f7bce428d9eb4..e6a4de4fbffd2 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c @@ -50,7 +50,8 @@ static int asus_acpi_get_sensor_info(struct acpi_device *adev, union acpi_object *cpm; int ret; - status = acpi_evaluate_object(adev->handle, "CNF0", NULL, &buffer); + status = acpi_evaluate_object_typed(adev->handle, "CNF0", NULL, + &buffer, ACPI_TYPE_PACKAGE); if (ACPI_FAILURE(status)) return -ENODEV; @@ -60,6 +61,8 @@ static int asus_acpi_get_sensor_info(struct acpi_device *adev, int j; elem = &cpm->package.elements[i]; + if (elem->type != ACPI_TYPE_PACKAGE) + continue; for (j = 0; j < elem->package.count; ++j) { union acpi_object *sub_elem; @@ -76,7 +79,7 @@ static int asus_acpi_get_sensor_info(struct acpi_device *adev, } } ret = cpm->package.count; - kfree(buffer.pointer); + ACPI_FREE(buffer.pointer); return ret; } -- 2.47.3