This is a note to let you know that I've just added the patch titled
iio: adxl367: Fix unsafe buffer attributes
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-adxl367-fix-unsafe-buffer-attributes.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5e23b33d1e84f04c80da6f1d89cbb3d3a3f81e01 Mon Sep 17 00:00:00 2001
From: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Date: Mon, 3 Oct 2022 11:10:29 +0300
Subject: iio: adxl367: Fix unsafe buffer attributes
From: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
commit 5e23b33d1e84f04c80da6f1d89cbb3d3a3f81e01 upstream.
The devm_iio_kfifo_buffer_setup_ext() was changed by
commit 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr")
to silently expect that all attributes given in buffer_attrs array are
device-attributes. This expectation was not forced by the API - and some
drivers did 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 location.
Change the IIO_CONST_ATTRs from the driver to IIO_DEVICE_ATTR in order
to prevent the invalid memory access.
Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Fixes: 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr")
Cc: <Stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/2e2d9ec34fb1df8ab8e2749199822db8cc91d302.1664782676.git.mazziesaccount@xxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/accel/adxl367.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
--- a/drivers/iio/accel/adxl367.c
+++ b/drivers/iio/accel/adxl367.c
@@ -1185,17 +1185,30 @@ static ssize_t adxl367_get_fifo_watermar
return sysfs_emit(buf, "%d\n", fifo_watermark);
}
-static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
-static IIO_CONST_ATTR(hwfifo_watermark_max,
- __stringify(ADXL367_FIFO_MAX_WATERMARK));
+static ssize_t hwfifo_watermark_min_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sysfs_emit(buf, "%s\n", "1");
+}
+
+static ssize_t hwfifo_watermark_max_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sysfs_emit(buf, "%s\n", __stringify(ADXL367_FIFO_MAX_WATERMARK));
+}
+
+static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0);
+static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
adxl367_get_fifo_watermark, NULL, 0);
static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
adxl367_get_fifo_enabled, NULL, 0);
static const struct attribute *adxl367_fifo_attributes[] = {
- &iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
- &iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+ &iio_dev_attr_hwfifo_watermark_min.dev_attr.attr,
+ &iio_dev_attr_hwfifo_watermark_max.dev_attr.attr,
&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
NULL,
Patches currently in stable-queue which might be from mazziesaccount@xxxxxxxxx are
queue-6.0/iio-adxl367-fix-unsafe-buffer-attributes.patch
queue-6.0/iio-adxl372-fix-unsafe-buffer-attributes.patch
queue-6.0/tools-iio-iio_utils-fix-digit-calculation.patch
