This is a note to let you know that I've just added the patch titled
hwmon: (asus_atk0110) fix uninitialized data access
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: hwmon-asus_atk0110-fix-uninitialized-data-access.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Thu Dec 21 09:02:40 CET 2017
From: Arnd Bergmann arnd@arndb.de Date: Thu, 23 Mar 2017 16:03:11 +0100 Subject: hwmon: (asus_atk0110) fix uninitialized data access
From: Arnd Bergmann arnd@arndb.de
[ Upstream commit a2125d02443e9a4e68bcfd9f8004fa23239e8329 ]
The latest gcc-7 snapshot adds a warning to point out that when atk_read_value_old or atk_read_value_new fails, we copy uninitialized data into sensor->cached_value:
drivers/hwmon/asus_atk0110.c: In function 'atk_input_show': drivers/hwmon/asus_atk0110.c:651:26: error: 'value' may be used uninitialized in this function [-Werror=maybe-uninitialized]
Adding an error check avoids this. All versions of the driver are affected.
Fixes: 2c03d07ad54d ("hwmon: Add Asus ATK0110 support") Signed-off-by: Arnd Bergmann arnd@arndb.de Reviewed-by: Luca Tettamanti kronos.it@gmail.com Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hwmon/asus_atk0110.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/hwmon/asus_atk0110.c +++ b/drivers/hwmon/asus_atk0110.c @@ -646,6 +646,9 @@ static int atk_read_value(struct atk_sen else err = atk_read_value_new(sensor, value);
+ if (err) + return err; + sensor->is_valid = true; sensor->last_updated = jiffies; sensor->cached_value = *value;
Patches currently in stable-queue which might be from arnd@arndb.de are
queue-4.9/hwmon-asus_atk0110-fix-uninitialized-data-access.patch queue-4.9/bna-avoid-writing-uninitialized-data-into-hw-registers.patch queue-4.9/virtio-balloon-use-actual-number-of-stats-for-stats-queue-buffers.patch queue-4.9/virtio_balloon-prevent-uninitialized-variable-use.patch queue-4.9/isdn-kcapi-avoid-uninitialized-data.patch