4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
commit c8d2f34ea96ea3bce6ba2535f867f0d4ee3b22e1 upstream.
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@xxxxxxxxxxxx>
Fixes: c6e3fd22cd538 ("Staging: add speakup to the staging directory")
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20240323164843.1426997-1-samuel.thibault@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/speakup/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/speakup/main.c
+++ b/drivers/staging/speakup/main.c
@@ -577,7 +577,7 @@ static u_long get_word(struct vc_data *v
}
attr_ch = get_char(vc, (u_short *)tmp_pos, &spk_attr);
buf[cnt++] = attr_ch;
- while (tmpx < vc->vc_cols - 1) {
+ while (tmpx < vc->vc_cols - 1 && cnt < sizeof(buf) - 1) {
tmp_pos += 2;
tmpx++;
ch = get_char(vc, (u_short *)tmp_pos, &temp);
