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;a=summary
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@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Dec 21 09:02:40 CET 2017
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Thu, 23 Mar 2017 16:03:11 +0100
Subject: hwmon: (asus_atk0110) fix uninitialized data access
From: Arnd Bergmann <arnd@xxxxxxxx>
[ 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@xxxxxxxx>
Reviewed-by: Luca Tettamanti <kronos.it@xxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxx 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