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: NVlad Tsyrklevich <vlad@tsyrklevich.net>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org