Dear, Thank you very much for your support. And will you assign a CVE-ID for the issue?
Best regards, Huawei PSIRT -----邮件原件----- 发件人: P J P [mailto:ppan...@redhat.com] 发送时间: 2016年10月12日 0:28 收件人: Qemu Developers 抄送: Michael S. Tsirkin; Paolo Bonzini; Huawei PSIRT; Prasad J Pandit 主题: [PATCH] char: serial: check divider value against baud base From: Prasad J Pandit <p...@fedoraproject.org> 16550A UART device uses an oscillator to generate frequencies (baud base), which decide communication speed. This speed could be changed by dividing it by a divider. If the divider is greater than the baud base, speed is set to zero, leading to a divide by zero error. Add check to avoid it. Reported-by: Huawei PSIRT <ps...@huawei.com> Signed-off-by: Prasad J Pandit <p...@fedoraproject.org> --- hw/char/serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/char/serial.c b/hw/char/serial.c index 3442f47..f659bbd 100644 --- a/hw/char/serial.c +++ b/hw/char/serial.c @@ -153,7 +153,7 @@ static void serial_update_parameters(SerialState *s) int speed, parity, data_bits, stop_bits, frame_size; QEMUSerialSetParams ssp; - if (s->divider == 0) + if (s->divider == 0 || s->divider > s->baudbase) return; /* Start bit. */ -- 2.5.5
