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speakup: Avoid crash on very long word 

In case a console is set up really large and contains a really long word
(> 256 characters), we have to stop before the length of the word buffer.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Fixes: c6e3fd22cd ("Staging: add speakup to the staging directory")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240323164843.1426997-1-samuel.thibault@ens-lyon.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Samuel Thibault 2024-03-23 17:48:43 +01:00 committed by Greg Kroah-Hartman
parent fec50db703
commit c8d2f34ea9
1 changed files with 1 additions and 1 deletions
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2
drivers/accessibility/speakup/main.c
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@ -574,7 +574,7 @@ static u_long get_word(struct vc_data *vc)
} }
attr_ch = get_char(vc, (u_short *)tmp_pos, &spk_attr); attr_ch = get_char(vc, (u_short *)tmp_pos, &spk_attr);
buf[cnt++] = attr_ch; buf[cnt++] = attr_ch;
while (tmpx < vc->vc_cols - 1) { while (tmpx < vc->vc_cols - 1 && cnt < sizeof(buf) - 1) {
tmp_pos += 2; tmp_pos += 2;
tmpx++; tmpx++;
ch = get_char(vc, (u_short *)tmp_pos, &temp); ch = get_char(vc, (u_short *)tmp_pos, &temp);