patch "iio:imu:st_lsm6dsx: check st_lsm6dsx_shub_read_output return" added to staging-testing

This is a note to let you know that I've just added the patch titled

iio:imu:st_lsm6dsx: check st_lsm6dsx_shub_read_output return

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the staging-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From f71e41e23e129640f620b65fc362a6da02580310 Mon Sep 17 00:00:00 2001
From: Tom Rix <[email protected]>
Date: Sun, 9 Aug 2020 10:55:51 -0700
Subject: iio:imu:st_lsm6dsx: check st_lsm6dsx_shub_read_output return

Potential error return is not checked. This can lead to use of undefined data.

Detected by clang static analysis.

st_lsm6dsx_shub.c:540:8: warning: Assigned value is garbage or undefined

        *val = (s16)le16_to_cpu(*((__le16 *)data));
             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---
 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c | 2 ++
 1 file changed, 2 insertions(+)

index ed83471dc7dd..8c8d8870ca07 100644
@@ -313,6 +313,8 @@ st_lsm6dsx_shub_read(struct st_lsm6dsx_sensor *sensor, u8 addr,
 
 	err = st_lsm6dsx_shub_read_output(hw, data,
 					  len & ST_LS6DSX_READ_OP_MASK);
+	if (err < 0)
+		return err;
 
 	st_lsm6dsx_shub_master_enable(sensor, false);
 

2.28.0