A potential race in drivers/staging/speakup/speakup.ko

[Pavel Andrianov]

Hi!

There is a potential race in drivers/staging/speakup/speakup.ko.
All operations with global pointers buff_in and buff_out are performed 
without any locks. Thus, a simultaneous write (via synth_buffer_clear or 
synth_buffer_add) to the pointers may lead to inconsistent data.

Should a local lock be used here?

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