From: Prasad J Pandit <[email protected]> The ctz32() routine could return a value greater than TC6393XB_GPIOS=16, because the device has 24 GPIO level bits but we only implement 16 outgoing lines. This could lead to an OOB array access. Mask 'level' to avoid it.
Reported-by: Moguofang <[email protected]> Signed-off-by: Prasad J Pandit <[email protected]> Message-id: [email protected] Reviewed-by: Peter Maydell <[email protected]> Signed-off-by: Peter Maydell <[email protected]> --- hw/display/tc6393xb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/display/tc6393xb.c b/hw/display/tc6393xb.c index 74d10af..0ae6360 100644 --- a/hw/display/tc6393xb.c +++ b/hw/display/tc6393xb.c @@ -172,6 +172,7 @@ static void tc6393xb_gpio_handler_update(TC6393xbState *s) int bit; level = s->gpio_level & s->gpio_dir; + level &= MAKE_64BIT_MASK(0, TC6393XB_GPIOS); for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) { bit = ctz32(diff); -- 2.7.4
