From: Prasad J Pandit <p...@fedoraproject.org> The ctz32() routine could return value greater than TC6393XB_GPIOS=16. This could lead to an OOB array access. Add check to avoid it.
Reported-by: Moguofang <moguof...@huawei.com> Signed-off-by: Prasad J Pandit <p...@fedoraproject.org> --- hw/display/tc6393xb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/display/tc6393xb.c b/hw/display/tc6393xb.c index 74d10af3d4..78292cb847 100644 --- a/hw/display/tc6393xb.c +++ b/hw/display/tc6393xb.c @@ -175,6 +175,10 @@ static void tc6393xb_gpio_handler_update(TC6393xbState *s) for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) { bit = ctz32(diff); + if (bit >= TC6393XB_GPIOS) { + fprintf(stderr, "TC6393xb: no GPIO pin %d\n", bit); + return; + } qemu_set_irq(s->handler[bit], (level >> bit) & 1); } -- 2.13.6