IIO The iio_triggered_buffer_setup_ext() has been changed to expect that all attributes given in buffer_attrs array are device-attributes. This expectation has not been forced by the API and not all existing users were checked. Some drivers do register attributes created by IIO_CONST_ATTR(). The added attribute "wrapping" does not copy the pointer to stored string constant and when the sysfs file is read the kernel will access to invalid address. This series aims to address both the drivers using IIO_CONST_ATTR() and the API. Use of IIO_CONST_ATTR() has been dropped from drivers for the triggered buffers and the iio_triggered_buffer_setup_ext() is changed to take an array of pointers to struct iio_dev_attr instead of an array of pointers to struct attribute. This should fix the existing users and also prevent similar problem to occur in the future. I am not super happy about the new macro IIO_STATIC_CONST_DEVICE_ATTR() which unconditionally creates a static function and a static struct iio_dev_attr. OTOH, I do believe static function + static struct iio_dev_attr should be the right thing to do for majority of use cases. I did also change the struct iio_buffer to have array of pointers to iio_dev_attr in order to avoid yet another copying in side the iio_triggered_buffer_setup_ext(). This change appeared to be somewhat intrusive - and as I lack the hardware to do thorough testing I added the request for testing tag here. Especially testing of adi-axi-adc would be highly appreciated as it is using the industrialio-buffer-dmaengine. Changelog v2: - fix also the cros_ec_sensors_core.c - fix also the industrialio-buffer-dmaengine.c - add RFT + this cover-letter. -- Matti Vaittinen (2): iio: Add IIO_STATIC_CONST_DEVICE_ATTR iio: Fix unsafe buffer attributes drivers/iio/accel/adxl367.c | 16 ++++++++-------- drivers/iio/accel/adxl372.c | 16 ++++++++-------- drivers/iio/accel/bmc150-accel-core.c | 18 +++++++++--------- drivers/iio/adc/at91-sama5d2_adc.c | 16 ++++++++-------- .../iio/buffer/industrialio-buffer-dmaengine.c | 4 ++-- .../iio/buffer/industrialio-triggered-buffer.c | 4 ++-- drivers/iio/buffer/kfifo_buf.c | 2 +- .../cros_ec_sensors/cros_ec_sensors_core.c | 6 +++--- .../common/hid-sensors/hid-sensor-trigger.c | 8 ++++---- drivers/iio/industrialio-buffer.c | 11 +++++++---- include/linux/iio/buffer_impl.h | 2 +- include/linux/iio/kfifo_buf.h | 3 ++- include/linux/iio/sysfs.h | 11 +++++++++++ include/linux/iio/triggered_buffer.h | 6 +++--- 14 files changed, 69 insertions(+), 54 deletions(-) base-commit: f76349cf41451c5c42a99f18a9163377e4b364ff -- 2.37.3 -- Matti Vaittinen, Linux device drivers ROHM Semiconductors, Finland SWDC Kiviharjunlenkki 1E 90220 OULU FINLAND ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~ Simon says - in Latin please. ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~ Thanks to Simon Glass for the translation =]
Attachment:
signature.asc
Description: PGP signature
