staging/speakup: fix get_word non-space look-ahead

get_char was erroneously given the address of the pointer to the text
instead of the address of the text, thus leading to random crashes when
the user requests speaking a word while the current position is on a space
character and say_word_ctl is not enabled.

Reported-on: https://github.com/bytefire/speakup/issues/1
Reported-by: Kirk Reiser <kirk@reisers.ca>
Reported-by: Janina Sajka <janina@rednote.net>
Reported-by: Alexandr Epaneshnikov <aarnaarn2@gmail.com>
Reported-by: Gregory Nowak <greg@gregn.net>
Reported-by: deedra waters <deedra@the-brannons.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Tested-by: Alexandr Epaneshnikov <aarnaarn2@gmail.com>
Tested-by: Gregory Nowak <greg@gregn.net>
Tested-by: Michael Taboada <michael@michaels.world>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200306003047.thijtmqrnayd3dmw@function
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/speakup/main.c b/drivers/staging/speakup/main.c
index 488f253..81ecfd1 100644 (file)
--- a/drivers/staging/speakup/main.c
+++ b/drivers/staging/speakup/main.c
@@ -561,7 +561,7 @@ static u_long get_word(struct vc_data *vc)
                return 0;
        } else if (tmpx < vc->vc_cols - 2 &&
                   (ch == SPACE || ch == 0 || (ch < 0x100 && IS_WDLM(ch))) &&
-                  get_char(vc, (u_short *)&tmp_pos + 1, &temp) > SPACE) {
+                  get_char(vc, (u_short *)tmp_pos + 1, &temp) > SPACE) {
                tmp_pos += 2;
                tmpx++;
        } else {