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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2024-04-15 14:02:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-08 21:44:21 +0300 |
| commit | 008ab3c53bc4f0b2f20013c8f6c204a3203d0b8b (patch) | |
| tree | 0b3997b99341fe783a64a376586d65bc96cf0548 /drivers/accessibility | |
| parent | dd5a440a31fae6e459c0d6271dddd62825505361 (diff) | |
| download | linux-008ab3c53bc4f0b2f20013c8f6c204a3203d0b8b.tar.xz | |
speakup: Fix sizeof() vs ARRAY_SIZE() bug
The "buf" pointer is an array of u16 values. This code should be
using ARRAY_SIZE() (which is 256) instead of sizeof() (which is 512),
otherwise it can the still got out of bounds.
Fixes: c8d2f34ea96e ("speakup: Avoid crash on very long word")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/d16f67d2-fd0a-4d45-adac-75ddd11001aa@moroto.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/accessibility')
| -rw-r--r-- | drivers/accessibility/speakup/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/accessibility/speakup/main.c b/drivers/accessibility/speakup/main.c index 736c2eb8c0f3..f677ad2177c2 100644 --- a/drivers/accessibility/speakup/main.c +++ b/drivers/accessibility/speakup/main.c @@ -574,7 +574,7 @@ static u_long get_word(struct vc_data *vc) } attr_ch = get_char(vc, (u_short *)tmp_pos, &spk_attr); buf[cnt++] = attr_ch; - while (tmpx < vc->vc_cols - 1 && cnt < sizeof(buf) - 1) { + while (tmpx < vc->vc_cols - 1 && cnt < ARRAY_SIZE(buf) - 1) { tmp_pos += 2; tmpx++; ch = get_char(vc, (u_short *)tmp_pos, &temp); |