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: andria...@ispras.ru