A potential race in drivers/iio/adc/vf610_adc.ko

[Pavel Andrianov]

Hi!

There is a potential race in drivers/iio/adc/vf610_adc.ko.
Handlers vf610_set_conversion_mode and vf610_write_raw are called via 
device_attibute interface, but they are related to different attributes, 
so may be executed in parallel. vf610_set_conversion_mode acquires the 
mutex indio_dev->mlock, and vf610_write_raw does not. Thus updating the 
structure 'info' may be performed simultaneously.

Should vf610_write_raw also acquire the same mutex indio_dev->mlock?

--
Pavel Andrianov
Linux Verification Center, ISPRAS
web: http://linuxtesting.org
e-mail: andrianov@xxxxxxxxx