linux/drivers/accessibility
Samuel Thibault f0992098ca speakup: Reject setting the speakup line discipline outside of speakup
Speakup exposing a line discipline allows userland to try to use it,
while it is deemed to be useless, and thus uselessly exposes potential
bugs. One of them is simply that in such a case if the line sends data,
spk_ttyio_receive_buf2 is called and crashes since spk_ttyio_synth
is NULL.

This change restricts the use of the speakup line discipline to
speakup drivers, thus avoiding such kind of issues altogether.

Cc: stable@vger.kernel.org
Reported-by: Shisong Qin <qinshisong1205@gmail.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Tested-by: Shisong Qin <qinshisong1205@gmail.com>
Link: https://lore.kernel.org/r/20201129193523.hm3f6n5xrn6fiyyc@function
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-30 09:20:32 +01:00
..
braille treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
speakup speakup: Reject setting the speakup line discipline outside of speakup 2020-11-30 09:20:32 +01:00
Kconfig staging/speakup: Move out of staging 2020-07-29 14:02:41 +02:00
Makefile staging/speakup: Move out of staging 2020-07-29 14:02:41 +02:00