diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 136b225b6bc8..520743fde103 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -7,6 +7,7 @@
 #include <linux/err.h>
 #include <linux/export.h>
 #include <linux/minmax.h>
+#include <linux/mm.h>
 #include <linux/mutex.h>
 #include <linux/property.h>
 #include <linux/slab.h>
@@ -989,6 +990,11 @@ ssize_t iio_read_channel_ext_info(struct iio_channel *chan,
 {
 	const struct iio_chan_spec_ext_info *ext_info;
 
+	if (!buf || offset_in_page(buf)) {
+		pr_err("iio: invalid ext_info read buffer\n");
+		return -EINVAL;
+	}
+
 	ext_info = iio_lookup_ext_info(chan, attr);
 	if (!ext_info)
 		return -EINVAL;
@@ -1014,6 +1020,11 @@ EXPORT_SYMBOL_GPL(iio_write_channel_ext_info);
 
 ssize_t iio_read_channel_label(struct iio_channel *chan, char *buf)
 {
+	if (!buf || offset_in_page(buf)) {
+		pr_err("iio: invalid label read buffer\n");
+		return -EINVAL;
+	}
+
 	return do_iio_read_channel_label(chan->indio_dev, chan->channel, buf);
 }
 EXPORT_SYMBOL_GPL(iio_read_channel_label);
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index 333d1d8ccb37..6a4479616479 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -418,7 +418,7 @@ unsigned int iio_get_channel_ext_info_count(struct iio_channel *chan);
  * @chan:		The channel being queried.
  * @attr:		The ext_info attribute to read.
  * @buf:		Where to store the attribute value. Assumed to hold
- *			at least PAGE_SIZE bytes.
+ *			at least PAGE_SIZE bytes and to be aligned at PAGE_SIZE.
  *
  * Returns the number of bytes written to buf (perhaps w/o zero termination;
  * it need not even be a string), or an error code.
@@ -445,7 +445,7 @@ ssize_t iio_write_channel_ext_info(struct iio_channel *chan, const char *attr,
  * iio_read_channel_label() - read label for a given channel
  * @chan:		The channel being queried.
  * @buf:		Where to store the attribute value. Assumed to hold
- *			at least PAGE_SIZE bytes.
+ *			at least PAGE_SIZE bytes and to be aligned at PAGE_SIZE.
  *
  * Returns the number of bytes written to buf, or an error code.
  */