This is a note to let you know that I've just added the patch titled
iio:imu:mpu6050: Fixed segfault in Invensens MPU driver due to null dereference
to the 3.14-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-imu-mpu6050-fixed-segfault-in-invensens-mpu-driver-due-to-null-dereference.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b9b3a41893c3f1be67b5aacfa525969914bea0e9 Mon Sep 17 00:00:00 2001
From: Atilla Filiz <atilla.filiz@xxxxxxxxxxxxx>
Date: Fri, 11 Apr 2014 16:51:23 +0200
Subject: iio:imu:mpu6050: Fixed segfault in Invensens MPU driver due to null dereference
From: Atilla Filiz <atilla.filiz@xxxxxxxxxxxxx>
commit b9b3a41893c3f1be67b5aacfa525969914bea0e9 upstream.
The driver segfaults when the kernel boots with device tree as the
platform data is then not present and the pointer is deferenced without
checking it is not null. This patch introduces such a check avoiding the
crash.
Signed-off-by: Atilla Filiz <atilla.filiz@xxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -661,6 +661,7 @@ static int inv_mpu_probe(struct i2c_clie
{
struct inv_mpu6050_state *st;
struct iio_dev *indio_dev;
+ struct inv_mpu6050_platform_data *pdata;
int result;
if (!i2c_check_functionality(client->adapter,
@@ -673,8 +674,10 @@ static int inv_mpu_probe(struct i2c_clie
st = iio_priv(indio_dev);
st->client = client;
- st->plat_data = *(struct inv_mpu6050_platform_data
- *)dev_get_platdata(&client->dev);
+ pdata = (struct inv_mpu6050_platform_data
+ *)dev_get_platdata(&client->dev);
+ if (pdata)
+ st->plat_data = *pdata;
/* power is turned on inside check chip type*/
result = inv_check_and_setup_chip(st, id);
if (result)
Patches currently in stable-queue which might be from atilla.filiz@xxxxxxxxxxxxx are
queue-3.14/iio-imu-mpu6050-fixed-segfault-in-invensens-mpu-driver-due-to-null-dereference.patch
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