Commit 30f939fe authored by Vlad Tsyrklevich's avatar Vlad Tsyrklevich Committed by Wolfram Sang

i2c: fix kernel memory disclosure in dev interface

i2c_smbus_xfer() does not always fill an entire block, allowing
kernel stack memory disclosure through the temp variable. Clear
it before it's read to.
Signed-off-by: default avatarVlad Tsyrklevich <vlad@tsyrklevich.net>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
parent a121103c
...@@ -331,7 +331,7 @@ static noinline int i2cdev_ioctl_smbus(struct i2c_client *client, ...@@ -331,7 +331,7 @@ static noinline int i2cdev_ioctl_smbus(struct i2c_client *client,
unsigned long arg) unsigned long arg)
{ {
struct i2c_smbus_ioctl_data data_arg; struct i2c_smbus_ioctl_data data_arg;
union i2c_smbus_data temp; union i2c_smbus_data temp = {};
int datasize, res; int datasize, res;
if (copy_from_user(&data_arg, if (copy_from_user(&data_arg,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment